1001 - Document - Cover Page link:presentationLink link:definitionLink link:calculationLink 1002 - Statement - Consolidated Balance Sheets link:presentationLink link:definitionLink link:calculationLink 1003 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:definitionLink link:calculationLink 1004 - Statement - Consolidated Statements Of Comprehensive Income link:presentationLink link:definitionLink link:calculationLink 1005 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:definitionLink link:calculationLink 1006 - Statement - Consolidated Statements of Cash Flows (Parenthetical) link:presentationLink link:definitionLink link:calculationLink 1007 - Statement - Consolidated Statements Of Shareholders' Equity link:presentationLink link:definitionLink link:calculationLink 999001 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure link:presentationLink link:definitionLink link:calculationLink 999002 - Disclosure - Organization and Basis of Presentation link:presentationLink link:definitionLink link:calculationLink 999003 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:definitionLink link:calculationLink 999004 - Disclosure - Business Combinations link:presentationLink link:definitionLink link:calculationLink 999005 - Disclosure - Investments link:presentationLink link:definitionLink link:calculationLink 999006 - Disclosure - Long-Term Time Deposits and Held-to-Maturity Investments link:presentationLink link:definitionLink link:calculationLink 999007 - Disclosure - Licensed Copyrights, Net link:presentationLink link:definitionLink link:calculationLink 999008 - Disclosure - Produced Content, Net link:presentationLink link:definitionLink link:calculationLink 999009 - Disclosure - Accounts Receivable link:presentationLink link:definitionLink link:calculationLink 999010 - Disclosure - Other Assets link:presentationLink link:definitionLink link:calculationLink 999011 - Disclosure - Fixed Assets link:presentationLink link:definitionLink link:calculationLink 999012 - Disclosure - Goodwill and Intangible Assets link:presentationLink link:definitionLink link:calculationLink 999013 - Disclosure - Accounts Payable and Accrued Liabilities link:presentationLink link:definitionLink link:calculationLink 999014 - Disclosure - Loans Payable link:presentationLink link:definitionLink link:calculationLink 999015 - Disclosure - Notes Payable link:presentationLink link:definitionLink link:calculationLink 999016 - Disclosure - Convertible Senior Notes link:presentationLink link:definitionLink link:calculationLink 999017 - Disclosure - Leases link:presentationLink link:definitionLink link:calculationLink 999018 - Disclosure - Income Taxes link:presentationLink link:definitionLink link:calculationLink 999019 - Disclosure - Employee Defined Contribution Plan link:presentationLink link:definitionLink link:calculationLink 999020 - Disclosure - Commitments and Contingencies link:presentationLink link:definitionLink link:calculationLink 999021 - Disclosure - Redeemable Noncontrolling Interests link:presentationLink link:definitionLink link:calculationLink 999022 - Disclosure - Shareholders' Equity link:presentationLink link:definitionLink link:calculationLink 999023 - Disclosure - Earnings Per Share link:presentationLink link:definitionLink link:calculationLink 999024 - Disclosure - Share-Based Awards Plan link:presentationLink link:definitionLink link:calculationLink 999025 - Disclosure - Related Party Transactions link:presentationLink link:definitionLink link:calculationLink 999026 - Disclosure - Segment Reporting link:presentationLink link:definitionLink link:calculationLink 999027 - Disclosure - Fair Value Measurements link:presentationLink link:definitionLink link:calculationLink 999028 - Disclosure - Significant Accounting Policies (Policies) link:presentationLink link:definitionLink link:calculationLink 999029 - Disclosure - Organization and Basis of Presentation (Tables) link:presentationLink link:definitionLink link:calculationLink 999030 - Disclosure - Summary of Significant Accounting Policies (Tables) link:presentationLink link:definitionLink link:calculationLink 999031 - Disclosure - Business Combinations (Tables) link:presentationLink link:definitionLink link:calculationLink 999032 - Disclosure - Investments (Tables) link:presentationLink link:definitionLink link:calculationLink 999033 - Disclosure - Long-Term Time Deposits and Held-to-Maturity Investments (Tables) link:presentationLink link:definitionLink link:calculationLink 999034 - Disclosure - Licensed Copyrights, Net (Tables) link:presentationLink link:definitionLink link:calculationLink 999035 - Disclosure - Produced Content, Net (Tables) link:presentationLink link:definitionLink link:calculationLink 999036 - Disclosure - Accounts Receivable (Tables) link:presentationLink link:definitionLink link:calculationLink 999037 - Disclosure - Other Assets (Tables) link:presentationLink link:definitionLink link:calculationLink 999038 - Disclosure - Fixed Assets (Tables) link:presentationLink link:definitionLink link:calculationLink 999039 - Disclosure - Goodwill and Intangible Assets (Tables) link:presentationLink link:definitionLink link:calculationLink 999040 - Disclosure - Accounts Payable and Accrued Liabilities (Tables) link:presentationLink link:definitionLink link:calculationLink 999041 - Disclosure - Notes Payable (Tables) link:presentationLink link:definitionLink link:calculationLink 999042 - Disclosure - Convertible Senior Notes (Tables) link:presentationLink link:definitionLink link:calculationLink 999043 - Disclosure - Leases (Tables) link:presentationLink link:definitionLink link:calculationLink 999044 - Disclosure - Income Taxes (Tables) link:presentationLink link:definitionLink link:calculationLink 999045 - Disclosure - Commitments and Contingencies (Tables) link:presentationLink link:definitionLink link:calculationLink 999046 - Disclosure - Redeemable Noncontrolling Interests (Tables) link:presentationLink link:definitionLink link:calculationLink 999047 - Disclosure - Shareholders' Equity (Tables) link:presentationLink link:definitionLink link:calculationLink 999048 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:definitionLink link:calculationLink 999049 - Disclosure - Share-Based Awards Plan (Tables) link:presentationLink link:definitionLink link:calculationLink 999050 - Disclosure - Related Party Transactions (Tables) link:presentationLink link:definitionLink link:calculationLink 999051 - Disclosure - Segment Reporting (Tables) link:presentationLink link:definitionLink link:calculationLink 999052 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:definitionLink link:calculationLink 999053 - Disclosure - Organization and Basis of Presentation - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999054 - Disclosure - Financial Statement Balances and Amounts of VIEs and Subsidiaries Included in Consolidating Financial Statements After Elimination of Intercompany Balances and Transactions Among VIEs and Subsidiaries within Group (Detail) link:presentationLink link:definitionLink link:calculationLink 999055 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999056 - Disclosure - Estimated Useful Lives of Fixed Assets (Detail) link:presentationLink link:definitionLink link:calculationLink 999057 - Disclosure - Weighted Average Useful Lives from Date of Purchase of Intangible Assets (Detail) link:presentationLink link:definitionLink link:calculationLink 999058 - Disclosure - Summary of Estimated Fair Value of Asset Acquired and Liabilities Assumed (Detail) link:presentationLink link:definitionLink link:calculationLink 999059 - Disclosure - Business Combinations - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999060 - Disclosure - Investments - Short-term Investments - Additional information (Detail) link:presentationLink link:definitionLink link:calculationLink 999061 - Disclosure - Investments - Schedule of Short-term Investments at Amortized Cost and Fair Value (Detail) link:presentationLink link:definitionLink link:calculationLink 999062 - Disclosure - Investments - Long-term Investments - Additional information (Detail) link:presentationLink link:definitionLink link:calculationLink 999063 - Disclosure - Investments - Summary of Breakdown of Long-term Investments (Detail) link:presentationLink link:definitionLink link:calculationLink 999064 - Disclosure - Schedule of Unrealized and Realized Gains and Losses of Equity Securities Without Readily Determinable Fair Values (Detail) link:presentationLink link:definitionLink link:calculationLink 999065 - Disclosure - Summarized Financial Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999066 - Disclosure - Investments - Summary of Fair Value of Available-For-Sale Debt Investments (Detail) link:presentationLink link:definitionLink link:calculationLink 999067 - Disclosure - Summary of Estimated Fair Value of Available-For-Sale Debt Investments, Classified by the Contractual Maturity Date (Detail) link:presentationLink link:definitionLink link:calculationLink 999068 - Disclosure - Long-Term Time Deposits and Held-to-Maturity Investments - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999069 - Disclosure - Long-Term Time Deposits and Held-to-Maturity Investments - Summary of Classification of Long Term Time Deposits and Held-to-Maturity Investments (Detail) link:presentationLink link:definitionLink link:calculationLink 999070 - Disclosure - Long-Term Time Deposits and Held-to-Maturity Investments - Summary of Estimated Amortized Cost of Long Term Time Deposits and Held-to-Maturity Investments (Detail) link:presentationLink link:definitionLink link:calculationLink 999071 - Disclosure - Licensed Copyrights, Net - Disclosure of Licensed Copyrights (Detail) link:presentationLink link:definitionLink link:calculationLink 999072 - Disclosure - Licensed Copyrights, Net - Schedule of Estimated Future Amortisation Expenses For Licensed Copyrights (Detail) link:presentationLink link:definitionLink link:calculationLink 999073 - Disclosure - Licensed Copyrights, Net - Additional information (Detail) link:presentationLink link:definitionLink link:calculationLink 999074 - Disclosure - Produced Content, Net - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999075 - Disclosure - Produced Content, Net - Summary of Released, Less Amortization And Impairment (Detail) link:presentationLink link:definitionLink link:calculationLink 999076 - Disclosure - Produced Content, Net - Summary of Estimated Future Amortization Expenses For Product Content (Detail) link:presentationLink link:definitionLink link:calculationLink 999077 - Disclosure - Accounts Receivable (Detail) link:presentationLink link:definitionLink link:calculationLink 999078 - Disclosure - Movement in Allowance for credit losses (Detail) link:presentationLink link:definitionLink link:calculationLink 999079 - Disclosure - Other Assets (Detail) link:presentationLink link:definitionLink link:calculationLink 999080 - Disclosure - Other Assets (Parenthetical) (Detail) link:presentationLink link:definitionLink link:calculationLink 999081 - Disclosure - Fixed Assets (Detail) link:presentationLink link:definitionLink link:calculationLink 999082 - Disclosure - Fixed Assets - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999083 - Disclosure - Goodwill and Intangible Assets - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999084 - Disclosure - Changes in the Carrying Amount of Goodwill (Detail) link:presentationLink link:definitionLink link:calculationLink 999085 - Disclosure - Finite-Lived Intangible Assets (Detail) link:presentationLink link:definitionLink link:calculationLink 999086 - Disclosure - Estimated Amortization Expense Relating to Existing Intangible Assets with Finite Lives (Detail) link:presentationLink link:definitionLink link:calculationLink 999087 - Disclosure - Accounts Payable and Accrued Liabilities (Detail) link:presentationLink link:definitionLink link:calculationLink 999088 - Disclosure - Loans Payable - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999089 - Disclosure - Notes Payable - Summary of Company Issued and Publicly Sold Unsecured Senior Notes (Detail) link:presentationLink link:definitionLink link:calculationLink 999090 - Disclosure - Notes Payable - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999091 - Disclosure - Principal Amount and Unamortized Discount and Debt Issuance Costs (Detail) link:presentationLink link:definitionLink link:calculationLink 999092 - Disclosure - Repayment of Principal Amount of Long Term Debts (Detail) link:presentationLink link:definitionLink link:calculationLink 999093 - Disclosure - Convertible Senior Notes - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999094 - Disclosure - Convertible Senior Notes - Summary of Carying Amount of the Convertible Notes (Detail) link:presentationLink link:definitionLink link:calculationLink 999095 - Disclosure - Convertible Senior Notes - Summary of Debt Instruments Interest Cost Recognized (Detail) link:presentationLink link:definitionLink link:calculationLink 999096 - Disclosure - Leases -Summary of Supplemental cash flow information (Detail) link:presentationLink link:definitionLink link:calculationLink 999097 - Disclosure - Leases -Summary of Future lease payments (Detail) link:presentationLink link:definitionLink link:calculationLink 999098 - Disclosure - Leases - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999099 - Disclosure - Income Taxes - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999100 - Disclosure - Income (Loss) Before Income Taxes (Detail) link:presentationLink link:definitionLink link:calculationLink 999101 - Disclosure - Components of Income Tax (Detail) link:presentationLink link:definitionLink link:calculationLink 999102 - Disclosure - Reconciliation of Effective Income Tax Provision of Tax Computed By Applying Statutory Income Tax Rate to Pre-Tax Income (Detail) link:presentationLink link:definitionLink link:calculationLink 999103 - Disclosure - Tax Effects of Temporary Differences that Gave Rise to Deferred Tax Assets and Liabilities (Detail) link:presentationLink link:definitionLink link:calculationLink 999104 - Disclosure - Employee Defined Combination Plan - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999105 - Disclosure - Commitment and Contingencies - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999106 - Disclosure - Future Minimum Payments Under Non-cancelable Leases with Initial Terms of One-Year or More (Detail) link:presentationLink link:definitionLink link:calculationLink 999107 - Disclosure - Future Minimum Lease Payments For Non-Cancelable Agreements For Licensed Copyrights and Produced Content (Detail) link:presentationLink link:definitionLink link:calculationLink 999108 - Disclosure - Summary of Redeemable Noncontrolling Interest (Detail) link:presentationLink link:definitionLink link:calculationLink 999109 - Disclosure - Redeemable Noncontrolling Interests - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999110 - Disclosure - Shareholder's Equity - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999111 - Disclosure - Shareholders' Equity (Detail) link:presentationLink link:definitionLink link:calculationLink 999112 - Disclosure - Changes in Accumulated Other Comprehensive Income (Loss) by Component, Net of Tax (Detail) link:presentationLink link:definitionLink link:calculationLink 999113 - Disclosure - Tax Benefit (expense) Allocated to each Component of Other Comprehensive Income (loss) (Detail) link:presentationLink link:definitionLink link:calculationLink 999114 - Disclosure - Reconciliation of Net Income to Numerator for Computation of Basic and Diluted earnings Per Share (Detail) link:presentationLink link:definitionLink link:calculationLink 999115 - Disclosure - Computation of Basic and Diluted Earnings Per Class A and Class B Ordinary Share (Detail) link:presentationLink link:definitionLink link:calculationLink 999116 - Disclosure - Share-Based Awards Plan - Additional Information of Baidu, Inc. (Detail) link:presentationLink link:definitionLink link:calculationLink 999117 - Disclosure - Option Activity Baidu. Inc (Detail) link:presentationLink link:definitionLink link:calculationLink 999118 - Disclosure - Assumptions Used to Estimate Fair Values of Share Options Granted - Baidu, Inc. (Detail) link:presentationLink link:definitionLink link:calculationLink 999119 - Disclosure - Restricted Shares Activity (Detail) link:presentationLink link:definitionLink link:calculationLink 999120 - Disclosure - Share-Based Awards Plan - Option Activity (Detail) link:presentationLink link:definitionLink link:calculationLink 999121 - Disclosure - Total Share-Based Compensation Cost Recognized (Detail) link:presentationLink link:definitionLink link:calculationLink 999122 - Disclosure - Related Party Transactions - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999123 - Disclosure - Related Party Transactions - Revenue Recognized From Related Party Transactions With Investees (Detail) link:presentationLink link:definitionLink link:calculationLink 999124 - Disclosure - Related Party Transactions (Detail) link:presentationLink link:definitionLink link:calculationLink 999125 - Disclosure - Segment Reporting - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999126 - Disclosure - Segment Reporting - Summary of Group's Operating Segment Results (Detail) link:presentationLink link:definitionLink link:calculationLink 999127 - Disclosure - Segment Reporting - Summary of Revenue Disaggregated by Revenue (Detail) link:presentationLink link:definitionLink link:calculationLink 999128 - Disclosure - Fair Value Measurements - Schedule of Assets and liabilities Measured on a Recurring Basis (Detail) link:presentationLink link:definitionLink link:calculationLink 999129 - Disclosure - Fair Value Measurements - Schedule of Investments accounted at Fair Value (Detail) link:presentationLink link:definitionLink link:calculationLink 999130 - Disclosure - Fair Value Measurements - Schedule of Available-for-sale debt investments (Detail) link:presentationLink link:definitionLink link:calculationLink 999131 - Disclosure - Fair Value Measurements - Summary of Assets Measured at Fair Value on a Non-Recurring Basis (Detail) link:presentationLink link:definitionLink link:calculationLink Cover [Abstract] Document Information [Table] Document Information [Line Items] Document Type Amendment Flag Document Period End Date Document Fiscal Year Focus Document Fiscal Period Focus Trading Symbol Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Filer Category Entity Emerging Growth Company Entity Shell Company Entity Common Stock, Shares Outstanding Security Exchange Name Title of 12(b) Security Document Transition Report Document Annual Report Entity Current Reporting Status Entity Voluntary Filers Entity Interactive Data Current Entity File Number Entity Incorporation, State or Country Code Entity Address, Address Line One Entity Address, Postal Zip Code Entity Address, Country Entity Address, Address Line Two Local Phone Number City Area Code Entity Address, City or Town Document Registration Statement Contact Personnel Name Contact Personnel Fax Number Contact Personnel Email Address Document Shell Company Report No Trading Symbol Flag ICFR Auditor Attestation Flag Auditor Name Auditor Firm ID Auditor Location Document Accounting Standard Document Financial Statement Error Correction [Flag] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common Class A [Member] Class A Ordinary Shares Class A Ordinary Shares Common Class B [Member] Class B Ordinary Shares Class B Ordinary Shares ADR [Member] American Depositary Shares ADR Entity Addresses, Address Type [Axis] Address Type [Domain] Business Contact [Member] Business Contact Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Cash and cash equivalents Restricted Cash and Cash Equivalents, Current Restricted cash Short-term Investments Short-term investments, net Short-term investments, net Accounts Receivable, Net, Current Accounts receivable, net of allowance of RMB3,517 and RMB5,001 (US$715) as of December 31, 2024 and 2025, respectively Accounts receivable, net Amounts Due From Related Parties Current Amounts due from related parties Amounts due from related parties, current Amounts due from related parties current. Other Assets, Current Other current assets, net Total other current assets Assets, Current Total current assets Current assets Assets, Noncurrent [Abstract] Non-current assets: Property, Plant and Equipment, Net Fixed assets, net Fixed assets, net Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Goodwill Goodwill Goodwill Beginning Balance Ending Balance Long-Term Investments Long-term investments, net Long-term investments, net Total long-term investments Deferred Income Tax Assets, Net Deferred tax assets, net Amounts Due From Related Parties Non Current Amounts due from related parties Amounts due from related parties, non-current Amounts due from related parties non current. Other Assets, Noncurrent Other non-current assets Total other non-current assets Assets, Noncurrent Total non-current assets Total non-current assets Non-current assets Operating Lease, Right-of-Use Asset Operating lease right-of-use assets Licensed Copyrights Asset Net Licensed copyrights, net Licensed copyrights asset, net. Film, Capitalized Cost Produced content, net Total Receivables Related To Proposed Acquisition Net Non Current Receivables related to the proposed acquisition of YY Live, net Receivables related to proposed acquisition net non current. Long Term Time Deposits And Held To Maturity Investments Long-term time deposits and held-to-maturity investments Long-term time deposits and held-to-maturity investments. Assets Total assets Total Liabilities and Equity [Abstract] LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY Liabilities, Current [Abstract] Current liabilities (including amounts of the consolidated VIEs without recourse to the primary beneficiaries of RMB39,711 and RMB37,165 (US$5,315) as of December 31, 2024 and 2025, respectively): Short-term Debt Short-term loans Accounts Payable and Accrued Liabilities, Current Accounts payable and accrued liabilities Total accounts payable and accrued liabilities Deferred Income, Current Deferred income Loans Payable to Bank, Current Long-term loans, current portion Senior Notes, Current Notes payable, current portion Amounts Due To Related Parties Current Amounts due to related parties Amounts due to related parties, current Amounts​ due to related ​parties current. Liabilities, Current Total current liabilities Total current liabilities Total current third-party liabilities Current liabilities Customer Deposits And Deferred Revenue Customer deposits and deferred revenue Customer deposits and deferred revenue. Operating Lease, Liability, Current Operating lease liabilities Convertible Debt, Current Convertible senior notes, current portion Liabilities, Noncurrent [Abstract] Non-current liabilities (including amounts of the consolidated VIEs without recourse to the primary beneficiaries of RMB7,352 and RMB8,242 (US$1,179) as of December 31, 2024 and 2025, respectively): Liabilities, Noncurrent Total non-current liabilities Total non-current liabilities Total non-current third-party liabilities Non-current liabilities Contract with Customer, Liability, Noncurrent Deferred revenue Deferred Income, Noncurrent Deferred income Loans Payable to Bank, Noncurrent Long-term loans Senior Notes, Noncurrent Notes payable Convertible Debt, Noncurrent Convertible senior notes Convertible notes Deferred Income Tax Liabilities, Net Deferred tax liabilities Other Liabilities, Noncurrent Other non-current liabilities Operating Lease, Liability, Noncurrent Operating lease liabilities Amounts Due To Related Parties Non Current Amounts due to related parties Amounts due to related parties, non-current Amounts ​due to related​ parties non current. Liabilities Total liabilities Redeemable Noncontrolling Interest, Equity, Carrying Amount Redeemable noncontrolling interests Balance as of January 1 Balance as of December 31 Liabilities and Equity Total liabilities, redeemable noncontrolling interests and equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Equity Common Stock, Value, Issued Ordinary shares, value Additional Paid in Capital Additional paid-in capital Retained Earnings (Accumulated Deficit) Retained earnings Total retained earnings Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Stockholders' Equity Attributable to Parent Total Baidu, Inc. shareholders' equity Stockholders' Equity Attributable to Noncontrolling Interest Noncontrolling interests Equity, Including Portion Attributable to Noncontrolling Interest Total equity Balances Balances Treasury Stock, Value Treasury stock Commitments and Contingencies Commitments and contingencies Related Party Transaction [Axis] Related Party Transaction [Domain] Allowance for Doubtful Accounts Receivable, Current Allowance for doubtful accounts receivable Allowance for credit losses Balance as of January 1 Balance as of December 31 Common Stock, Par or Stated Value Per Share Common stock, par value per share Par value per share (US$) Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Common stock, shares outstanding Balances (in shares) Balances (in shares) Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Variable Interest Entity, Not Primary Beneficiary [Member] Variable Interest Entity, Not Primary Beneficiary Variable Interest Entity Income Statement [Abstract] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Common Class A and Class B [Member] Common Class A and Class B Common Class A and Class B [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] American Depositary Share [Member] American Depositary Shares American Depositary Share [Member] Costs and Expenses [Abstract] Costs and expenses: Cost of Goods and Services Sold Cost of revenue Cost of revenue Selling, General and Administrative Expense Selling, general and administrative Research and Development Expense Research and development Costs and Expenses Total costs and expenses Total costs and expenses Operating Income (Loss) Operating income (loss) Operating income (loss) Impairment, Long-Lived Asset, Held-for-Use Impairment of long-lived assets Earnings Per Share [Abstract] Earnings per shares: Earnings Per Share, Basic Basic Earnings per share - basic Earnings Per Share, Diluted Diluted Earnings per share - diluted Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Weighted average number of Class A and Class B ordinary shares outstanding Weighted Average Number of Shares Outstanding, Basic Basic Weighted average ordinary shares outstanding Denominator used for basic EPS Weighted Average Number of Shares Outstanding, Diluted Diluted Denominator used for diluted EPS Nonoperating Income (Expense) [Abstract] Other income: Investment Income, Interest Interest income Investment interest income Interest Expense, Debt Interest expense Contractual interest expense Foreign Currency Transaction Gain (Loss), before Tax Foreign exchange gain (loss), net Income (Loss) from Equity Method Investments Share of earnings (losses) from equity method investments Share of losses (earnings) from equity method investments Other Nonoperating Income (Expense) Others, net Nonoperating Income (Expense) Total other income, net Total other income (loss), net Other Comprehensive Income (Loss), Net of Tax [Abstract] Other comprehensive income (loss): Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign currency translation adjustments OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Unrealized gains (losses) on available-for-sale investments, net of reclassification Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss), net of tax Net current-period other comprehensive income (loss) Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), after Adjustments and Tax Unrealized losses on derivatives Revenues [Abstract] Revenue Revenue from Contract with Customer, Excluding Assessed Tax Revenue Revenue Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income before income taxes Income (loss) before income taxes Income Tax Expense (Benefit) Income tax expense Taxation for the year Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Net income Net income (loss) Net Income (Loss) Attributable to Noncontrolling Interest Less: net income (loss) attributable to noncontrolling interests Less: net income (loss) attributable to noncontrolling interests Net income attributable to Baidu, Inc. Net income attributable to Baidu, Inc. Net income (loss) attributable to Baidu, Inc. Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Less: comprehensive income (loss) attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income attributable to Baidu, Inc. Statement of Cash Flows [Abstract] Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Proceeds from Short-term Debt Proceeds from short-term loans Repayments of Short-term Debt Repayments of short-term loans Repayments of Long-term Lines of Credit Repayments of long-term loans Proceeds From Convertible Debt Net Of Issuance Cost Proceeds from issuance of convertible senior notes, net of issuance costs Proceeds from convertible debt net of issuance cost. Proceeds from Noncontrolling Interests Proceeds from issuance of subsidiaries' shares Proceeds from Stock Options Exercised Proceeds from exercise of share options Net Cash Provided by (Used in) Financing Activities Net cash provided by/ (used in) financing activities Net cash provided by/(used in) financing activities Repayments of Related Party Debt Repayment of loans borrowed from related parties Proceeds from Issuance of Redeemable Preferred Stock Proceeds from issuance of redeemable noncontrolling interests Acquisition Of Redeemable Non Controlling Interests And Non Controlling Interests In A Subsidiary Acquisition of redeemable noncontrolling interests and noncontrolling interests in subsidiaries The cash outflow associated with the acquisition of redeemable non controlling interests and non controlling interests in a subsidiary. Proceeds from Long-Term Lines of Credit Proceeds from long-term loans Repayments of Long Term Notes Repayments of long-term notes Repayments of long-term notes. Proceeds From Long Term Notes Net Of Issuance Cost Proceeds from issuance of long-term notes, net of issuance costs Proceeds from long term notes net of issuance cost. Repayments Of Other Financing Activities Repayments of other financing activities Repayments of other financing activities. Proceeds From Other Financing Activities Proceeds from other financing activities Proceeds from other financing activities. Repayments or Redemption of Convertible Senior Notes Repayments or redemption of convertible senior notes Repayments or redemption of convertible senior notes. Payments for Repurchase of Common Stock Repurchase of ordinary shares Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Payments to Acquire Property, Plant, and Equipment Acquisition of fixed assets Payments to Acquire Businesses, Net of Cash Acquired Acquisition of businesses, net of cash acquired Payments To Acquire Short Term And long Term Held To Maturity Securities Purchases of time deposits and held-to-maturity investments Amount of cash outflow through purchase of short-term and long-term held-to-maturity securities. Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities Maturities of time deposits and held-to-maturity investments Payments to Acquire Debt Securities, Available-for-sale Purchases of available-for-sale debt investments Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Sales and maturities of available-for-sale debt investments Loans Provided To Third Parties Loans provided to third parties The cash outflow associated with providing loans to third parties. Proceeds from Collection of Long-term Loans to Related Parties Repayment from loans provided to related parties Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net cash used in investing activities Payments for (Proceeds from) Other Investing Activities Other investing activities Payments to Acquire Intangible Assets Acquisition of intangible assets Payments to Acquire Other Investments Purchases of equity investments Proceeds from Sale of Long-term Investments Proceeds from disposal of equity investments Repayment From Loans Provided To Third Parties Repayment from loans provided to third parties Repayment from loans provided to third parties. Proceeds from (Payments for) Trading Securities, Short-Term Purchases of trading investments Return Of Equity Method Investments Return of equity method investments Return of equity method investments. Loans Provided To Related Parties Loans provided to related parties Loans provided to related parties. Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by/ (used in) operating activities: Depreciation Depreciation of fixed assets and computer parts Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Gain on disposal of fixed assets Deferred Income Tax Expense (Benefit) Deferred income tax, net Share-based Compensation Share-based compensation Provision for Doubtful Accounts Allowance for credit losses Gain (Loss) on Investments Investment and interest income Amortization And Impairment Of Produced Content Amortization and impairment of produced content Amortization and impairment of produced content. Gain (Loss) on Disposition of Stock in Subsidiary Loss (gain) on disposal of subsidiaries or business Nonmonetary Transaction, Gross Operating Revenue Recognized Barter transaction revenue Other Noncash Income (Expense) Other non-cash expenses (income) Asset Impairment Charges Excluding Long Lived Assets Impairment of long-term investments and other assets excluding long-lived assets Asset impairment charges excluding long lived assets. Amortization of Licensed Copyrights Amortization of licensed copyrights Amortization of licensed copyrights. Accretion Expense Accretion on convertible senior notes and others Amortization And Impairment Of Intangible Assets Amortization and impairment of intangible assets Amortization and impairment of intangible assets. Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities, net of effects of acquisitions and disposals: Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Due from Related Parties Amounts due from related parties Increase (Decrease) in Prepaid Expense and Other Assets Other assets Increase Decrease Of Customer Deposits And Deferred Revenue Customer deposits and deferred revenue Increase decrease of customer deposits and deferred revenue. Increase (Decrease) in Deferred Income Deferred income The increase (decrease) during the reporting period in the liability reflecting subsidy or other income yet to be realized for which cash was received. Increase (Decrease) in Due to Related Parties Amounts due to related parties Increase Decrease In Licensed Copyrights Asset Licensed copyrights Increase (Decrease) in Licensed copyrights asset. Increase Decrease In Produced Content Asset Produced content Increase (Decrease) in Produced content asset. Increase Decrease In Accounts Payable And Accrued Liabilities And Other Non Current Liabilities Accounts payable and accrued liabilities and other non-current liabilities Increase decrease in accounts payable and accrued liabilities and other non current liabilities. Net Cash Provided by (Used in) Operating Activities Net cash provided by/ (used in) operating activities Net cash provided by/(used in) operating activities Noncash Investing and Financing Items [Abstract] Non-cash investing and financing activities: Noncash or Part Noncash Acquisition, Fixed Assets Acquired Acquisition of fixed assets included in accounts payable and accrued liabilities Supplemental Cash Flow Information [Abstract] Supplemental disclosures: Interest Paid, Excluding Capitalized Interest, Operating Activities Interest paid Income Taxes Paid, Net Income taxes paid Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Effect of exchange rate changes on cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net decrease in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash at the beginning of the year Cash, cash equivalents and restricted cash at the end of the year Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] Reconciliation of cash, cash equivalents and restricted cash: Restricted Cash and Cash Equivalents Restricted cash Restricted Cash, Noncurrent Long-term restricted cash Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Domain] Jurisdictions Outside Chinese Mainland [Member] Jurisdictions Outside Chinese Mainland [Member] Jurisdictions Outside Chinese Mainland. Chinese Mainland Jurisdictions [Member] Statement of Stockholders' Equity [Abstract] Common Stock [Member] Ordinary Shares Additional Paid-in Capital [Member] Additional Paid-in Capital Retained Earnings [Member] Retained Earnings AOCI Attributable to Parent [Member] Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income Noncontrolling Interest [Member] Noncontrolling interests Treasury Stock, Common [Member] Treasury Stock Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest Net income (loss) Stockholders Equity Increase From Subsidiary Equity Issuance Issuance of shares by the Company's subsidiaries to noncontrolling interests Amount of increase in Stockholders' equity from subsidiary issuance of equity interests. Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Exercise of share-based awards (in shares) Stock Issued During Period Value Share based Compensation Net of Forfeitures Exercise of share-based awards Stock issued during period, value, share-based compensation, net of forfeitures. Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Share-based compensation Temporary Equity Dividends And Accretion To Redemption Value Adjustment Accretion of redeemable noncontrolling interests Temporary Equity Dividends And Accretion To Redemption Value Adjustment Stockholders' Equity, Other Others Stockholders' Equity, Other Shares Others (in shares) Other Comprehensive Loss Net Of Tax Including Portion Attributable To Nonredeemable Noncontrolling Interest Other comprehensive loss Amount after tax and reclassification adjustments of other comprehensive loss, including the portion attributable to nonredeemable noncontrolling interest. Excludes the portion attributable to redeemable noncontrolling interest recognized as temporary equity. Minority Interest Decrease From Paid and Payable Of Dividends To Noncontrolling Interest Holders Dividends paid and payable by the Company's subsidiaries Minority interest decrease from Paid and payable of dividends to noncontrolling interest holders. Minority Interest Decrease From Redemptions of redeemable noncontrolling interests and noncontrolling interests Acquisition of noncontrolling interests Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders and redeemable noncontrolling interests, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests and redeemable noncontrolling interests). Stock Repurchased And Has Not Been Retired During Period Value Repurchase of ordinary shares Equity impact of the value of stock that has been repurchased during the period and has not been retired and is held in treasury. Stock Repurchased And Have Not Been retired During Period Shares Repurchase of ordinary shares (in shares) Number of shares that have been repurchased during the period and have not been retired and are held in treasury. Stock Repurchase And Retirement During Period Value Repurchase and retirement of ordinary shares Aggregate purchase price Stock repurchase and retirement during period value. Stock Repurchase And Retirement During Period Shares Repurchase and retirement of ordinary shares (in shares) Stock repurchase and retirement during period shares. Treasury Stock, Common, Shares Balances (in shares) Balances (in shares) Other Comprehensive Income Loss Net Of Tax Including Portion Attributable To Nonredeemable Noncontrolling Interest Other comprehensive income (loss) Amount after tax and reclassification adjustments of other comprehensive income (loss), including the portion attributable to nonredeemable noncontrolling interest. Excludes the portion attributable to redeemable noncontrolling interest recognized as temporary equity. Temporary Equity Dividends And Accretion To Redemption Shares Adjustment Accretion of redeemable noncontrolling interests (in shares) Temporary equity dividends and accretion to redemption shares adjustment. Minority Interest Decrease From Paid and Payable Of Dividends To Noncontrolling Interest Holders Shares Dividends paid and payable by the Company's subsidiaries (in shares) Minority interest decrease from paid and payable of dividends to noncontrolling interest holders shares. Adjustments To Additional Paid In Capital Share based Compensation Requisite Service Period Recognition Shares Share-based compensation (in shares) Adjustments to additional paid in capital share based compensation requisite service period recognition shares. Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Domain] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Organization and Basis of Presentation Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Business Combinations [Abstract] Business Combination Disclosure [Text Block] Business Combinations Schedule of Investments [Abstract] Investment [Text Block] Investments Investments and Other Noncurrent Assets [Text Block] Long-Term Time Deposits and Held-to-Maturity Investments Licensed Copyrights [Abstract] Licensed Copyrights Disclosure Of Licensed Copyrights [Text Block] Licensed Copyrights, Net Disclosure Of Licensed Copyrights Disclosure Of Produced Content Net [Abstract] Disclosure of produced content ,net. Film Costs [Text Block] Produced Content, Net Film costs. Receivables [Abstract] Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Accounts Receivable Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Other Current Assets [Text Block] Other Assets Property, Plant and Equipment [Abstract] Property, Plant and Equipment Disclosure [Text Block] Fixed Assets Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Intangible Assets Payables and Accruals [Abstract] Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accounts Payable and Accrued Liabilities Debt Disclosure [Abstract] Loans Payable Disclosure [Text Block] Loans Payable The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. Notes Payable Disclosure [Text Block] Notes Payable The entire disclosure for information about notes payable, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. Text Block [Abstract] Convertible Senior Notes [Text Block] Convertible Senior Notes Convertible Senior Notes [Text Block]. Leases [Abstract] Lessee, Operating Leases [Text Block] Leases Income Tax Disclosure [Abstract] Income Tax Disclosure [Text Block] Income Taxes Retirement Benefits [Abstract] Pension and Other Postretirement Benefits Disclosure [Text Block] Employee Defined Contribution Plan Commitments and Contingencies Disclosure [Abstract] Commitments Contingencies and Guarantees [Text Block] Commitments and Contingencies Temporary Equity Disclosure [Abstract] Temporary Equity Disclosure [Abstract] Redeemable Noncontrolling Interest Disclosure [Text Block] Redeemable Noncontrolling Interests Disclosure of redeemable noncontrolling interest (as defined) included in the statement of financial position as either a liability or temporary equity. As of the date of the statement of financial position, such redeemable noncontrolling interest is currently redeemable, as defined, for cash or other assets of the entity at (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the entity. Equity [Abstract] Stockholders' Equity Note Disclosure [Text Block] Shareholders' Equity Earnings Per Share [Text Block] Earnings Per Share Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Share-Based Awards Plan Related Party Transactions [Abstract] Related Party Transactions Disclosure [Text Block] Related Party Transactions Segment Reporting [Abstract] Segment Reporting Disclosure [Text Block] Segment Reporting Fair Value Disclosures [Abstract] Fair value disclosure Fair Value Disclosures [Text Block] Fair Value Measurements Summary Of Significant Accounting Policies [Table] Deferred revenue Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Consolidation, Policy [Policy Text Block] Principles of Consolidation Use of Estimates, Policy [Policy Text Block] Use of Estimates Foreign Currency Transactions and Translations Policy [Policy Text Block] Foreign Currency Segment Reporting, Policy [Policy Text Block] Segment Reporting Business Combinations and Other Purchase of Business Transactions, Policy [Policy Text Block] Business Combinations Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Cash, Cash Equivalents and Restricted Cash Investment, Policy [Policy Text Block] Investments Transfers and Servicing of Financial Assets, Transfers of Financial Assets, Policy [Policy Text Block] Transfers of Financial Assets Fair Value Measurement, Policy [Policy Text Block] Fair Value Measurements of Financial Instruments Property, Plant and Equipment, Policy [Policy Text Block] Fixed Assets Licensed Copyrights Policy [Policy Text Block] Licensed Copyrights, net Disclosure of accounting policy for licensed copyrights. This accounting policy also might address: (1) the measurement and classification of licensed copyrights; (2) the useful lives of licensed copyrights; and (3) how the entity assesses and measures impairment of licensed copyrights. Produced Content Policy [Text Block] Produced Content, net Produced Content Policy [Text Block] Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Impairment of Long-Lived Assets Other Than Goodwill Revenue Recognition, Policy [Policy Text Block] Revenue Recognition Cost of Sales, Policy [Policy Text Block] Cost of Revenue Advertising Costs, Policy [Policy Text Block] Advertising, Marketing and Promotional Expenses Government Assistance [Policy Text Block] Government Subsidies Lessee, Leases [Policy Text Block] Leases Income Tax, Policy [Policy Text Block] Income Taxes Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Share-based Compensation Earnings Per Share, Policy [Policy Text Block] Earnings Per Share ("EPS") Commitments and Contingencies, Policy [Policy Text Block] Contingencies Concentration Risk, Credit Risk, Policy [Policy Text Block] Concentration of Risks Derivatives, Policy [Policy Text Block] Derivative Instruments New Accounting Pronouncements, Policy [Policy Text Block] Recently Adopted Accounting Pronouncements Impairment Of Licensed Copyrights And Produced Contents [Policy Text Block] Impairment of Licensed Copyrights and Produced Content Disclosure of accounting policy for the impairment of licensed copyrights and produced contents. Recently Issued But Not Yet Adopted Accounting Pronouncements [Policy Text Block] Recent Accounting Pronouncements Recently issued but not yet adopted accounting pronouncements Accounts Receivable and Contracts Asset Net of Allowance [Policy Text Block] Accounts Receivable and Contract Assets, net Disclosure of accounting policy for accounts receivable and contract asset. Research and Development Expense, Policy [Policy Text Block] Research and Development Expenses Currency Translation For Financial Statements Presentation [Policy Text Block] Currency Translation For Financial Statements Presentation Disclosure of the exchange rate of currency translation for financial statements presentation from RMB into US dollar $ (USD) on December 29, 2023, the last business day in fiscal year 2023. Stockholders Equity Treasury Stock [Policy Text Block] Treasury Stock Disclosure of accounting policy for its treasury shares. Goodwill And Intangible Asset Goodwill [Policy Text Block] Goodwill and Intangible Assets Disclosure of accounting policy for goodwill and intangible assets. Comparative Information [Policy Text Block] Comparative Information Disclosure of accounting policy for comparative information adjusted in the financial information of the equity method investees, certain produced content related disclosures presented and certain iQIYI's segment revenue related disclosures presented to conform with the current year's presentation to facilitate comparison. Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Financial Statement Balances and Amounts of VIEs and Subsidiaries Included in Consolidating Financial Statements After Elimination of Intercompany Balances and Transactions Among VIEs and Subsidiaries within Group [Abstract] Variable interest entity consolidated balances [Abstract]. Disclosure In Tabular Form Of Summary Of Income Statement And Cash Flow Of Variable Interest Entity [Table Text Block] Summary of Income Statement and Cash Flow of Variable Interest Entity Disclosure in tabular form of summary of income statement and cash flow of variable interest entity. Disclosure In Tabular Form Of Summary Disclosure Of Balance Sheet Of Variable Interest Entity [Table Text Block] Summary of Balance Sheet of Variable Interest Entity Disclosure in tabular form of summary disclosure of balance sheet of variable interest entity. Schedule of Property, Plant and Equipment [Table Text Block] Estimated Useful lives of Fixed Assets Tabular disclosure of the estimated useful lives of property plant and equipment. Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] Intangible Assets, Weighted Average Economic Lives from Date of Purchase Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Line Items] Business Acquisition [Line Items] Schedule of Business Acquisitions, by Acquisition [Table Text Block] Summary of Estimated Fair Value of Asset Acquired and Liabilities Assumed Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Investment Type Name [Axis] Investment, Name [Axis] Investment Type Name Investment Type Name [Domain] Investment, Name [Domain] Investment Type Name Long Term Investments [Member] Long Term Investments Long Term Investments Trip Com [Member] Trip.com Group, Ltd Trip Com [Member] Equity Method Investments [Table Text Block] Equity Method Investments Debt Securities, Available-for-sale [Table Text Block] Summary of Fair Value of Available-For-Sale Debt Investments Investment [Table Text Block] Summary of Breakdown of Long-term Investments Equity Method Investments Excluding Trip [Table Text Block] Schedule of Equity Method Investments Excluding Trip Equity method investments excluding trip. Investments Classified by Contractual Maturity Date [Table Text Block] Summary of Estimated Fair Value of Available-For-Sale Debt Investments, Classified by the Contractual Maturity Date Carrying Amount of Equity Securities Without Readily Determinable Fair Values [Table Text Block] Schedule of the Carrying Amount of Equity Securities Without Readily Determinable Fair Values Carrying amount of equity securities without readily determinable fair values. Unrealized Gain Loss On Short Term Investments [Table Text Block] Schedule of Short-term Investments at Amortized Cost and Fair Value Tabular disclosure of unrealized gains and losses on short-term investments. Asset Class [Axis] Asset Class [Domain] Longterm Time Deposits and Heldtomaturity Investments [Table Text Block] Summary of Estimated Amortized Cost of Long Term Time Deposits and Held-to-Maturity Investments Tabular disclosure of information about long-term time deposits and held-to-maturity investments measured at amortized cost. Disclosure Of Licensed Copyrights [Table Text Block] Summary of Licensed Copyrights Disclosure Of Licensed Copyrights Schedule Of Estimated Future Amortisation Expenses For Licensed Copyrights [Table Text Block] Summary of Estimated Future Amortisation Expenses For Licensed Copyrights Schedule Of Estimated Future Amortisation Expenses For Licensed Copyrights. Summary Of Produced Content Net [Table Text Block] Components of Produced Content, Net Summary of produced content net. Estimated Amortization Expense Relating To Existing Produced Content [Table Text Block] Summary of estimated amortization expense relating to the existing produced content Estimated amortization expense relating to existing produced content. Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule of Accounts Receivable Allowance for Credit Losses on Financing Receivables [Table Text Block] Movements in Allowance for Credit Losses Schedule of Other Current Assets [Table Text Block] Other Assets Property, Plant and Equipment [Table Text Block] Fixed Assets Schedule of Goodwill [Table Text Block] Changes in the Carrying Amount of Goodwill Schedule of Finite-Lived Intangible Assets [Table Text Block] Intangible Assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Estimated Amortization Expense Relating to Existing Intangible Assets with Finite Lives Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Accounts Payable and Accrued Liabilities Schedule Of Issued And Publicly Sold Unsecured Senior Notes Table [Text Block] Summary of Company Issued and Publicly Sold Unsecured Senior Notes Schedule Of issued and publicly sold unsecured senior notes table [Text Block] Schedule of Long-term Debt Instruments [Table Text Block] Principal Amount and Unamortized Discount and Debt Issuance Costs Schedule of Maturities of Long-term Debt [Table Text Block] Long Term Loans Principal Repayments Convertible Debt [Table Text Block] Summary of Carying Amount of the Convertible Notes Schedule Of Debt Instruments Interest Cost Recognized [Table Text Block] Summary of Debt Instruments Interest Cost Recognized Schedule of debt instruments interest cost recognized. Operating Lease Expense And Schedule Of Supplemental Cash Flow Information Related To Operating Leases [Table Text Block] Operating lease expense and supplemental cash flow information related to operating leases Operating lease expense and Schedule of supplemental cash flow information related to operating leases Lessee, Operating Lease, Liability, Maturity [Table Text Block] Schedule of future lease payments under operating leases Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Income (Loss) Before Income Taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Components of Income Tax Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Reconciliation of Effective Income Tax Provision of Tax Computed By Applying Statutory Income Tax Rate to Pre-Tax Income Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Tax Effects of Temporary Differences that Gave Rise to Deferred Tax Assets and Liabilities Schedule Of Future Minimum Payments Under Noncancelable Agreements For Bandwidth And Property Management Fees [Table Text Block] Future Minimum Payments Under Non-cancelable Agreements with Initial Terms of One-Year or More Tabular disclosure of Future minimum payments under non-cancelable agreements for bandwidth and property management fees . Schedule Of Future Minimum Payments For Noncancelable Licensed Copyrights and Produced Content Fees [Table Text Block] Future Minimum Payments For Non-cancelable Agreements For Licensed Copyrights and Produced Content Tabular disclosure of future minimum payments for non cancelable Licensed Copyrights and Produced Content agreements. Redeemable Noncontrolling Interest [Table Text Block] Summary of Redeemable Noncontrolling Interest Retained Earnings Accumulated Deficit [Table Text Block] Retained Earning Tabular disclosure of the cumulative amount of the reporting entity's undistributed earnings or deficit which is classified into two parts: PRC statutory reserve funds and Unreserved retained earnings, the former of which are not allowed to be transferred to the Entity in terms of cash dividends, loans or advances, nor are they allowed for distribution except under liquidation. Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Changes in Accumulated Other Comprehensive Income (Loss) by Component, Net of Tax Schedule Of Tax Effects Allocated To Each Components Of Other Comprehensive Income Loss [Table Text Block] Tax Effect Allocated to Each Component of Other Comprehensive Loss Tabular disclosure of the tax effect allocated to the components of other comprehensive income (loss). Reconciliation Of Net Income To Numerator For Computation Of Basic And Diluted Net Income Per Share [Table TextBlock] Reconciliation of Net Income to Numerator for Computation of Basic and Diluted earnings Per Share Tabular disclosure of a reconciliation of net income attributable to Baidu, Inc. in the consolidated statements of comprehensive income to the numerator for the computation of basic and diluted net income attributable to Baidu, Inc. per share. Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Computation of Basic and Diluted Earnings Per Class A and Class B Ordinary Share iQIYI [Member] iQIYI iQIYI Member iQIYI [Member] Share Based Compensation By Entity [Axis] Share Based Compensation By Entity [Axis] Share Based Compensation By Entity [Axis] Share Based Compensation By Entity [Domain] Share Based Compensation By Entity [Domain] Share Based Compensation By Entity [Domain] Baidu [Member] Baidu Baidu [Member] Share-based Compensation, Stock Options, Activity [Table Text Block] Option Activity Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Assumptions Used to Estimate Fair Values of Share Options Granted Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Total Share-Based Compensation Cost Recognized Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Restricted Shares Activity Balances Of Due From Due To Related Parties [Table Text Block] Balances of due from due to related parties Balances of due from due to related parties. Revenue Recognized From Related Party Transactions With Investees [Table Text Block] Revenue recognized from related party transactions with Investees Revenue recognized from related party transactions with investees. Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segment Reporting Information [Line Items] Segment Reporting [Line Items] Segment Reporting Information [Line Items] Schedule of Segment Reporting Information, by Segment [Table Text Block] Summary of Group's Operating Segment Results Disaggregation of Revenue [Table Text Block] Summary of Revenues Disaggregated by Segment And By Types of Products or Services Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Financial Instruments [Domain] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Fair Value Disclosure and Measurement on Recurring Basis Schedule Of Rolling Forward Of Investments Accounted For At Fair Value Categorized Within Level 3 Under The Fair Value Hierarchy disclosure [Table Text Block] Schedule of rolling forward of Investments accounted for at fair value categorized within Level 3 under the fair value hierarchy Schedule Of Investments Accounted For Fair Value Disclosure" to "Schedule of rolling forward of Investments accounted for at fair value categorized within Level 3 under the fair value hierarchy. Schedule Of Rolling Forward Of Available for sale Debt Investments Categorized Within Level 3 Under The Fair Value Hierarchy Disclosure [Table Text Block] Schedule of rolling forward of available-for-sale debt investments categorized within Level 3 under the fair value hierarchy Schedule of rolling forward of available-for-sale debt investments categorized within Level 3 under the fair value hierarchy. Fair Value Measurements, Nonrecurring [Table Text Block] Summary of Assets Measured at Fair Value on a Non-Recurring Basis Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Beijing Perusal [Member] Beijing Perusal Beijing Perusal [Member] Baidu Netcom [Member] Baidu Netcom Baidu Netcom [Member] Organization [Line Items] Organization [Line Items] Organization. Interest Free Loans Provided By Subsidiary Of Entity To Shareholders Of Its Variable Interest Entities Interest-free loans provided by a subsidiary of the entity to the shareholders of its variable interest entities The amount of interest-free loans provided by a subsidiary of the entity to the shareholders of the variable interest entities controlled by the entity. Equity Pledge Agreement Expiration Period Equity pledge agreement expiration period The period after which the equity pledge agreement between the shareholders of the entity's VIE and the entity's subsidiary will expire after expiration of the term or the fulfillment by the entity's VIE and its shareholders of their respective obligations under the exclusive technology consulting and service agreement and the loan agreement. Net Assets Net assets of VIEs Non controlling Interest Increase From Subsidiary Equity Issuance Percentage Non controlling Interest Increase From Subsidiary Equity Issuance Percentage Non controlling interest increase from subsidiary equity issuance percentage. Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage Subsidiary, Ownership Percentage, Noncontrolling Owner Subsidiary, Ownership Percentage, Noncontrolling Owner Percentage Of Enlarged Registered Capital In IQIYI By Third Party Percentage of enlarged registered capital in iqiyi by third party. Value Of Investment In IQIYI ByThirdParty Value of investment in IQIYI By third party Value of investment in iqiyi by third party. Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Restatement [Axis] Restatement [Domain] Ownership [Axis] Ownership [Domain] Beijing iQIYI [Member] Beijing iQIYI Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Amounts Due To The Entities Within Baidu [Member] Amounts due to the entities within Baidu Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Variable Interest Entity Other Assets Current Others Current assets excluding cash and cash equivalents, short-term investments and accounts receivable. Variable Interest Entity Other Assets Noncurrent Others Noncurrent assets excluding fixed assets, intangible assets, licensed copyrights, Produced content, investments and operating lease right-of-use assets. Variable Interest Entity Other Liabilities Current Others Current liabilities excluding accounts payable and accrued liabilities, customer deposits and deferred revenue and operating lease liabilities. Liabilities Including Amounts Due To The Company And Its Non VIE Subsidiaries Net Total Liabilities including amounts due to the company and its non VIE subsidiaries net. Amounts Due To The Entities Within Baidu Amounts due to the other entities within Baidu Amounts due to the entities within baidu. Counterparty Name [Axis] Counterparty Name [Domain] Summary Of Significant Accounting Policies [Abstract] Summary Of Significant Accounting Policies [Abstract] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other Current Assets [Member] Other Current Assets, net Customer deposits and Deferred Revenue [Member] Customer deposits and deferred​ revenue​ Customer deposits and deferred​ revenue​. Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Financial Instruments [Member] Financial Instruments Financial instruments. Financial Institution One [Member] Financial Institution One Financial Institution One [Member] Financial Institution Two [Member] Financial Institution Two Financial Institution Two [Member] Financial Institution Three [Member] Financial Institution Three Financial Institution Three [Member] Sales Revenue, Net [Member] Sales Revenue, Net Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Credit Concentration Risk [Member] Credit Concentration Risk Customer Concentration Risk [Member] Customer Concentration Risk Entity by Location [Axis] Entity by Location [Axis] Location [Domain] Location [Domain] Onshore China [Member] Onshore China Financial institutions located in China. Offshore China [Member] Offshore China Financial institutions located out of China. Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Short-term Investments [Member] Short-term Investments Short-term Investments Cash and Cash Equivalents [Member] Cash and cash equivalents Nonmonetary Transaction Type [Axis] Nonmonetary Transaction Type [Axis] Nonmonetary Transaction Type [Domain] Nonmonetary Transaction Type [Domain] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment [Member] Office building and its related facility, machinery and equipment Office building related facility, machinery and equipment Range [Axis] Range [Axis] Range [Domain] Range [Domain] Maximum [Member] Maximum Number of Reportable Segments Number of reportable segments Maturity Period Used To Classify Cash And Cash Equivalents Maturity period used to classify cash and cash equivalents Maturity period used to classify cash and cash equivalents. Property, Plant and Equipment, Salvage Value, Percentage Property, plant and equipment, salvage value, percentage Number of Reporting Units Number of reporting units Net Value Of Contract Assets Net value of contract assets Net value of contract assets. Marketing and Advertising Expense Advertising, marketing and promotional expenses Concentration Risk, Percentage Concentration risk by percentage Number Of Customer Accounting For More Than Ten Percent Of Accounts Receivable Number of customers with receivable balance exceeding 10% Number Of Customer Accounting For More Than Ten Percent Of Accounts Receivable Number Of Customer Accounting For More Than Ten Percent Of Revenues Number of customer or any Baidu Union partner with revenue greater than 10% Number Of Customer Accounting For More Than Ten Percent Of Revenues Appreciation Or Depreciation Of Functional Currency Against Reporting Currency By Percentage Appreciation or depreciation of US$ against RMB, as a percentage Appreciation or depreciation of the functional currency against the reporting currency, as a percentage. Contract with Customer, Liability, Revenue Recognized Contract with Customer, Liability, Revenue Recognized Contract with Customer, Liability Contract liabilities Foreign Currency Exchange Rate, Translation Exchange rate used for conversion of financial statements from RMB to US dollar Maturity Period Used To Classify Shortterm Investments Maturity period used to classify short-term investments Maturity period used to classify short-term investments. Government Assistance, Asset, Decrease, Statement of Financial Position [Extensible Enumeration] Cash And Cash Equivalents Restricted Cash Short Term Investments Long Term Time Deposits and Held To Maturity Investments Cash and cash equivalents, restricted cash, short-term investments, long-term time deposits and held-to-maturity investments Cash and cash equivalents, restricted cash, short term investments, long term time deposits and held to maturity investments. Government Assistance, Asset, Decrease Government Assistance, Asset, Decrease Deposit Insurance System Amount Threshold Deposit insurance system amount Deposit insurance system amount. Government Assistance, Statement of Income or Comprehensive Income [Extensible Enumeration] Goodwill, Impairment Loss Impairment of goodwill Government Assistance, Amount Income from government subsidies Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Baidu General Business excluding Smart Living Group ("SLG"), SLG and iQIYI Baidu General Business excluding Smart Living Group ("SLG"), SLG and iQIYI Deferred Revenue [Member] Deferred Revenue Deferred Revenue [Member] Geographical [Axis] Geographical [Domain] State Administration of Taxation, China [Member] State Administration of Taxation, China PRC Inland Revenue, Hong Kong [Member] Inland Revenue, Hong Kong Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Building [Member] Office building Computer Equipment [Member] Computer equipment Office Equipment [Member] Office equipment Leasehold Improvements [Member] Leasehold improvements Vehicles and related machinery and equipment [Member] Vehicles and related machinery and equipment Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property Plant and Equipment Useful Life Description of Term Property, plant and equipment, useful life (description) Property plant and equipment useful life description of term. Property, Plant and Equipment, Useful Life Property, plant and equipment, useful life Minimum [Member] Minimum Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Trademarks [Member] Trademarks Other Intangible Assets [Member] Others Intellectual Property Right [Member] Intellectual property right Technology And Software [Member] Technology and software Technology and software. Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Finite-lived intangible asset weighted average economic life YY live [Member] Business Combination, Consideration Transferred Purchase consideration Business Acquisition Purchase Price Allocation Net Assets Acquired Excluding Intangible Assets And Related Deferred Tax Liabilities Net assets acquired, excluding intangible assets and the related deferred tax liabilities The amount of acquisition cost of a business combination allocated to assets acquired (excluding identifiable intangible assets and the related deferred tax liabilities) less liabilities assumed. Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill Intangible assets, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Deferred tax liabilities JOYY [Member] JOYY [Member] Business Combinations [Member] Business Combinations Business combinations. Restricted Cash, Current Restricted cash Payments for Previous Acquisition Additional cash payment to acquire business Payments to Acquire Businesses, Gross Total cash consideration Business Acquisition, Percentage of Voting Interests Acquired Percentage of voting equity interests acquired at the acquisition date Schedule of Investments [Table] Schedule of Investments [Table] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Investments, Debt and Equity Securities [Abstract] Schedule Of Amortized Cost Gain Loss And Fair Value On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Table] Schedule Of Amortized Cost Gain Loss And Fair Value On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Table] Schedule Of Amortized Cost Gain Loss And Fair Value On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items] Amortized cost, Gain (loss) and Fair value on Investments [Line Items] Schedule Of Amortized Cost Gain Loss And Fair Value On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items] Trading Debt Investments Trading Gains Trading debt investments, Trading gains Trading debt investments trading gains. Debt Securities, Trading Trading debt investments, Fair value Debt Securities, Trading, Amortized Cost Trading debt investments, Cost or amortized cost less allowance for credit losses Trading debt investments Debt Securities, Available-for-sale, Current Available-for-sale debt investments, fair value Available-for-sale debt investments Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Available-for-sale debt investments, gross unrealized gains Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss Held-to-maturity debt investments, Gross unrecognized holding losses Gross unrecognized holding losses Debt Securities, Available-for-Sale, Amortized Cost Available-for-sale debt investments, Cost or amortized cost less allowance for credit losses Debt Securities, Held-to-maturity, Fair Value Held-to-maturity debt investments, fair value Fair value Held-to-maturity debt investments Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain Held-to-maturity debt investments, gross unrecognized holding gains Gross unrecognized holding gains Debt Securities, Held-to-maturity, Current Held-to-maturity debt investments, Cost or amortized cost less allowance for credit losses Debt Security Category [Axis] Debt Security Category [Axis] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Corporate Debt Securities [Member] Corporate Debt Securities Investment [Axis] Investment Type [Axis] Investment [Domain] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] Equity Method Investments By Investee [Axis] Equity method investments by investee. Equity Method Investments By Investee [Domain] Equity method investments by investee. Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount Impairment charges recognized on equity investments measured at fair value using the measurement alternative Equity Method Investment, Ownership Percentage Percentage Of equity interest held by company Equity Method Investments, Fair Value Disclosure Fair value of equity investment Equity Method Investment, Realized Gain (Loss) on Disposal Gains on equity method investments Aggregate Number Of Shares Represented By Aggregate Ads Shares Equity method investment, disposal of ADS Aggregate number of shares represented by aggregate ads shares. Number of directors Number of directors. Title of Individual [Axis] Title of Individual [Axis] Title of Individual [Domain] Relationship to Entity [Domain] Active directors [Member] Active directors Active directors Investment Measurement Type [Axis] Measurement Basis [Axis] Investment measurement type. Investment Measurement Type [Domain] Fair Value Measurement [Domain] Investment measurement type. Class of Warrant or Right [Axis] Class of Warrant or Right [Domain] Components Of Equity Method Investments [Axis] Components of equity method investments. Components Of Equity Method Investments [Domain] Components of equity method investments. Long-term Investments [Abstract] Equity investments at fair value with readily determinable fair value Equity investments at fair value with readily determinable fair value Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as noncurrent. Debt Securities, Available-for-Sale, Noncurrent Available-for-sale debt investments Available-for-sale debt investments, fair value Equity Method Investments Equity method investments Investment Owned, at Fair Value Investments accounted for at fair value Investment Measured Using Measurement Alternative Amount Equity investments without readily determinable fair value using the measurement alternative Total carrying value Investment measured using measurement alternative amount. Investment Measured Using Nav Practical Expedient Amount Equity investments without readily determinable fair value using the NAV practical expedient Equity investments without readily determinable fair value using NAV practical expedient Investment measured using nav practical expedient amount. Equity Investments Without Readily Determinable Fair Value Using The Measurement Alternative [Abstract] Equity investments without readily determinable fair value using the measurement alternative [abstract] Equity investments without readily determinable fair value using the measurement alternative. Investment Measured Using Measurement Alternative Cost Initial cost basis Investment measured using measurement alternative cost. Cumulative Unrealized Gains Cumulative unrealized gains Cumulative unrealized gains. Cumulative Unrealized Losses Including impairment Cumulative unrealized losses (including impairment) Cumulative unrealized losses (including impairment). Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investments Excluding Trip [Member] Equity Method Investments excluding Trip Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Revenues Revenue Sales to related parties Revenue Gross Profit Gross profit Equity Method Investment Summarized Financial Information Income From Operations Income (loss) from operations Equity​ method investment​ summarized​ financial​ information​ income from operations. Equity Method Investment Summarized Net Income Loss Net income (loss) Equity method investment summarized net income loss. Equity Method Investment, Summarized Financial Information, Net Income (Loss) Attributable to Investees Net income (loss) attributable to the investees The amount of net income (loss) attributable to the investees reported by an equity method investment of the entity. Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Available-for-sale debt investments, gross unrealized losses Available For Sale Debt Investments [Member] Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Due in 1 year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value Due in 1 year through 5 years Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value Not due at a single maturity date Debt Securities, Available-for-sale Total Long Term Time Deposits And Held To Maturity Investments [Member] Long Term Time Deposits And Held To Maturity Investments [Member] Long ​term ​time ​deposits ​and ​held​ to maturity ​investments. Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract] Debt Securities, Held-to-Maturity [Table] Debt Securities, Held-to-maturity [Table] Schedule of Held-to-Maturity Securities [Line Items] Schedule of Held-to-maturity Securities [Line Items] Debt Securities, Held-to-maturity, Noncurrent Cost or amortized cost less allowance for credit losses Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Amortized Cost Total Held To Maturity Securities Debt Maturities After One Year Through Two Years Amortized Cost Basis Due in 1 year through 2 years Held to maturity securities debt maturities after one year through two years amortized cost basis. Held To Maturity Securities Debt Maturities After Two Years Through Three Years Amortized Cost Basis Due in 2 years through 3 years Held to maturity securities debt maturities after two years through three years amortized cost basis. Held To Maturity Securities Debt Maturities After Three Years Through Five Years Amortized Cost Basis Due in 3 years through 5 years Held to maturity securities debt maturities after three years through five years amortized cost basis. Disclosure Of Licensed Copyrights [Table] Licensed Copyrights By Type [Axis] Licensed Copy rights By Type [Domain] Broadcasting Rights [Member] Broadcasting Rights Broadcasting Rights Sublicensing Rights [Member] Sublicensing Rights Sublicensing Rights Disclosure of Licensed Copyrights [Line Items] Disclosure of Licensed Copyrights Licensed Copyrights Gross Carrying Value Licensed copyrights, gross carrying value Licensed Copyrights Gross Carrying Value. Licensed Copy Rights Accumulated Amortisation Licensed copyrights, accumulated amortisation Licensed Copy Rights Accumulated Amortisation Licensed Copyrights Accumulated Impairment Licensed copyrights, accumulated impairment Licensed Copyrights Accumulated Impairment Licensed Copy Rights Net Carrying Value Licensed copyrights, net carrying value Licensed Copy Rights Net Carrying Value Licensed Copyrights Gross Carrying Value Current Licensed copyrights, gross carrying value current Licensed Copyrights Gross Carrying Value Current Licensed Copy Rights Accumulated Amortisation Current Licensed copyrights, accumulated amortisation current Licensed Copy Rights Accumulated Amortisation Current Licensed Copyrights Accumulated Impairment Current Licensed copyrights, accumulated impairment current Licensed Copyrights Accumulated Impairment Current Licensed Copy Rights Net Carrying Value Current Licensed copyrights, net carrying value current Licensed Copy Rights Net Carrying Value Current Licensed Copyrights Gross Carrying Value Non Current Licensed copyrights, gross carrying value non current Licensed Copyrights Gross Carrying Value Non Current. Licensed Copy Rights Accumulated Amortisation Non Current Licensed copyrights, accumulated amortisation non current Licensed Copy Rights Accumulated Amortisation Non Current Licensed Copyrights Accumulated Impairment Non Current Licensed copyrights, accumulated impairment non current Licensed Copyrights Accumulated Impairment Non Current Licensed Copy Rights Net Carrying Value Non Current Licensed copyrights, net carrying value non current Licensed Copy Rights Net Carrying Value Non Current Licensed Copyrights Expected Amortisation Greater Than One Year And Less Than Two Years Between 1 and 2 years Licensed Copyrights Expected Amortisation Greater Than One Year And Less Than Two Years Licensed Copyrights Expected Amortisation Greater Than Two Years And Less Than Three Years Between 2 and 3 years Licensed Copyrights Expected Amortisation Greater Than Two Years And Less Than Three Years Licensed Copyrights Expected Amortisation Within One Year Within 1 year Licensed Copyrights Expected Amortisation Within One Year. Amortization of Intangible Assets Amortisation expenses of licensed copyrights Licensed Copyrights [Member] Licensed Copyrights Licensed Copyrights Disclosure Of Produced Content Net [Table] Disclosure of produced content net. Cost Of Revenue [Member] Cost of Revenue Cost of revenue. Disclosure Of Produced Content Net [Line Items] Disclosure of produced content net. Amortization expenses recognized as monetized in film group Amortization expense for produced content predominantly monetized with other content assets Film, Monetized on Its Own, Amortization Expense Amortization expense for produced content predominantly monetized on its own Film, Monetized in Film Group, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration] Film, Monetized on Its Own, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration] Produced Content Copyright Type [Axis] Produced content copyright type. Produced Content Copyright Type [Domain] Produced content copyright type. Released Less Amortization And Impairment [Member] Released, less amortization and impairment Released, less amortization and impairment. In Production Less Impairment [Member] In production, less impairment In production, less impairment. In Development Less Impairment [Member] In development, less impairment In development, less impairment. Film Monetized On Its Own And Film Monetized In Film Group Less Amortization Expense And Impairment Released Released, less amortization and impairment Film monetized on its own and film monetized in film group less amortization expense and impairment released. Film Monetized On Its Own And Film Monetized In Film Group Less Impairment Capitalized Cost Production In production, less impairment Film monetized on its own and film monetized In film group less impairment capitalized cost production. Film Monetized On Its Own And Film Monetized In Film Group Less Impairment Capitalized Cost Development In development, less impairment Film monetized on its own and film monetized in film group less impairment capitalized cost development. Film, Monetized in Film Group, Capitalized Cost, Released — Predominantly monetized with other contents Film, Monetized on Its Own, Capitalized Cost, Released —Predominantly monetized on its own Film, Monetized in Film Group, Capitalized Cost, Development and Preproduction — Predominantly monetized with other contents Film, Monetized in Film Group, Capitalized Cost, Production — Predominantly monetized with other contents Film, Monetized on Its Own, Capitalized Cost, Production —Predominantly monetized on its own Film, Monetized on Its Own, Capitalized Cost, Development and Preproduction — Predominantly monetized on its own Schedule Of Estimated Future Amortization Expenses For Licensed Copyrights [Abstract] Schedule of estimated future amortization expenses for licensed copyrights. Expected Amortization Existing Produced Content Anticipated To Be Amortized With In One Year Within 1 year Expected amortization existing produced content anticipated to be amortized with in one year. Expected Amortization Existing Produced Content Anticipated To Be Amortized Between One And Two Years Between 1 and 2 years Expected amortization existing produced content anticipated to be amortized between one and two years. Expected Amortization Existing Produced Content Anticipated To Be Amortized Between Two And Three Years Between 2 and 3 years Expected amortization existing produced content anticipated to be amortized between two and three years. Accounts Receivable, Gross, Current Accounts receivable Allowance for Doubtful Accounts Receivable [Roll Forward] Allowance for credit losses Allowance for Doubtful Accounts Receivable, Period Increase (Decrease) Amounts charged to expenses Allowance for Doubtful Accounts Receivable, Write-offs Amounts written off Prepaid Expense and Other Assets [Abstract] Prepaid Supplies Advances to suppliers Contract with Customer, Asset, Net, Current Contract assets, net Other Assets, Miscellaneous, Current Others VAT Prepayments VAT prepayments VAT prepayments. Other Assets, Miscellaneous, Noncurrent Others Inventories Inventories Amount of inventories expected to be sold, or consumed within one year or operating cycle, if longer. Prepaid Licensed Copyrights Non Current Prepaid licensed copyrights Prepaid licensed copyrights non current. Loan Due From PAG Non Current Loan due from PAG Loan due from pag non current. Supplies Non Current Long-term advances to suppliers Supplies non current. Receivables From Online Payment Agencies Receivables from online payment agencies Receivables from online payment agencies. Prepaid Expense And Other Assets [Table] Prepaid Expense And Other Assets [Table] Prepaid expense and other assets [Table]. Prepaid Expense And Other Assets [Line Items] Prepaid Expense And Other Assets [Line Items] Prepaid expense and other assets [Line Item]. Loan Due From PAG Non Currents Loan due from PAG non current Loan due from PAG non current. Loan Due From PAG Fixed Interest Rate Percentage Loan due from pag fixed interest rate percentage Loan due from pag fixed interest rate percentage. Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Office Building Related Facility Machinery And Equipment [Member] Office building related facility, machinery and equipment Construction in Progress [Member] Construction in Progress Property, Plant and Equipment, Gross Property, plant and equipment, gross Accumulated Depreciation And Impairment Property Plant And Equipment Accumulated depreciation and impairment Accumulated depreciation and impairment property plant and equipment. Depreciation, Depletion and Amortization Fixed assets, depreciation expense Amortization Of Intangible Assets Disclosure [Abstract] Amortization Of Intangible Assets Disclosure [Abstract] Amortization Of Intangible Assets Disclosure [Table] Amortization Of Intangible Assets Disclosure [Line Items] Number of Reporting Units Company Split Baidu Reporting Unit Into Number of reporting units the company The number of reporting units the company split Baidu reporting unit into. Amortization Expense Of Intangible Assets Amortization expense of intangible assets Amortization expense of intangible assets. Schedule of Goodwill [Table] Schedule of Goodwill [Table] Goodwill [Line Items] Goodwill [Line Items] Goodwill, Acquired During Period Goodwill acquired (Note 3) Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] SLG [Member] SLG SLG. Baidu General Business Excluding SLG [Member] Baidu General Business excluding SLG Technology-Based Intangible Assets [Member] Technology Finite-Lived Intangible Assets, Gross Finite-lived intangible assets, gross carrying value Finite-Lived Intangible Assets, Net Finite-lived intangible assets, net carrying value Finite Lived Intangible Assets Accumulated Amortization and Impairment Finite lived intangible assets accumulated amortization and impairment Finite lived intangible assets accumulated amortization and impairment. Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Estimated Amortization Expense [Abstract] Estimated amortization expense Estimated amortization expense. Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2026 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2027 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2028 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2029 Finite-Lived Intangible Assets, Amortization Expense, Year Five 2030 Employee-related Liabilities, Current Accrued payroll and welfare Taxes Payable, Current Tax payable Traffic Acquisition Costs, Current Traffic acquisition costs Carrying value as of the balance sheet date of obligations payable to the entity's union members for acquisition of traffic. The entity's union is the program through which the entity expands distribution of its customers sponsored links or advertisements by leveraging traffic of the entity's union members internet properties or distributing the entitys customers paid links through union members properties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Bandwidth Costs, Current Bandwidth costs Carrying value as of the balance sheet date of obligations incurred and payable to telecommunication operators for their telecommunication services and for hosting our servers at their Internet data centers. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Payable for Content Acquisition Content acquisition costs Carrying value as of the balance sheet date of obligations incurred and payable to video content provider/licensor and other content provider/licensor. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle, if longer). Accrued Liabilities, Current Accrued operating expenses Accounts Payable and Accrued Liabilities, Other, Current Others Aggregate carrying amount, as of the balance sheet date, of current accounts payable and accrued liabilities not separately disclosed in the balance sheet due to materiality considerations. Current accounts payable and accrued liabilities are expected to be paid within one year (or the normal operating cycle, if longer). Accrued Purchases Of Fixed Assets Current Accruals for purchases of fixed assets Accrued purchases of fixed assets current. Payables For Purchase Of Investments Payable for investments Payables for purchase of investments Payables For Purchasing Inventory Payables for purchasing inventory Payables for purchasing inventory. Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Factoring Arrangements [Member] Factoring Arrangements Factoring arrangements. A Group Of 22 Arrangers [Member] A Group Of 22 Arrangers A Group Of 22 Arrangers [Member] Factored Intercompany Accounts and Notes Receivables [Member] Factored Intercompany Accounts and Notes Receivables Factored Intercompany Accounts and Notes Receivables. Debt Instrument [Line Items] Debt Instrument [Line Items] Short-term Debt, Weighted Average Interest Rate, at Point in Time Weighted average interest rates for outstanding borrowings Line of Credit Facility, Remaining Borrowing Capacity Unused line of credit for short term loans Debt Instrument, Term Bank loan maturity period Debt Instrument, Interest Rate, Stated Percentage Interest rate Debt Instrument, Basis Spread on Variable Rate Debt instrument basis spread on variable rate Structured Payable Arrangements Amount Structured payable arrangement amount Structured payable arrangements amount. Debt Instrument, Face Amount Debt face amount Principal amount Principal Proceeds from Issuance of Debt Proceeds from Issuance of Debt Grosss Proceeds from issuance of debt Line of Credit Facility Unused Revolving Write off Line of credit facility unused revolving write off Line of credit facility unused revolving write off. Derivative, Notional Amount Gross notional amounts of derivatives Lender Name [Axis] Line of Credit Facility, Lender [Domain] Collateral [Axis] Collateral [Domain] Credit Facility [Axis] Credit Facility [Domain] Five Year Bullet Maturity Term Loan [Member] Five-year bullet maturity term loan Five-year bullet maturity term loan. Revolving Credit Facility [Member] Revolving Credit Facility Variable Rate [Axis] Variable Rate [Domain] London Interbank Offered Rate [Member] London Interbank Offered Rate London Interbank Offered Rate. Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate Derivative Instrument [Axis] Derivative Contract [Domain] Interest Rate Swap [Member] Interest Rate Swap Hedging Designation [Axis] Hedging Designation [Domain] Designated as Hedging Instrument [Member] Designated as Hedging Instrument Debt and Financial Instruments [Line Items] Debt and Financial Instruments [Line Items] Debt and Financial Instruments [Line Items] Debt Instrument, Issuance Date Issue date Debt Instrument, Maturity Date Mature date Debt, maturity date Debt Instrument, Interest Rate, Effective Percentage Effective interest rate Unsecured Senior Notes Due Two Thousand Twenty Seven Ten Year Notes [Member] 2027 Ten-year Notes Unsecured senior notes due two thousand twenty seven ten year notes. Unsecured Senior Notes Due Two Thousand Twenty Eight March [Member] 2028 March Notes Unsecured senior notes due 2028 march. Unsecured Senior Notes Due Two Thousand Twenty Eight November [Member] 2028 November Notes Unsecured senior notes due two thousand twenty eight november. Unsecured Senior Notes Due Two Thousand Twenty Five Ten Year Notes [Member] 2025 Ten-year Notes Unsecured senior notes due two thousand twenty five ten year notes. Unsecured Senior Notes Due Two Thousand Twenty Five Five Year Notes [Member] 2025 Five-year Notes Unsecured senior notes due two thousand twenty five five year notes. Unsecured Senior Notes Due Two Thousand Thirty April [Member] 2030 April Notes Unsecured senior notes due two thousand thirty april. Unsecured Senior Notes Due Two Thousand Twenty Six [Member] 2026 Notes Unsecured senior notes due two thousand twenty six notes. Unsecured Senior Notes Due Two Thousand Thirty October [Member] 2030 October Notes Unsecured senior notes due two thousand thirty october. Unsecured Senior Notes Due Two Thousand Thirty One [Member] 2031 Notes Unsecured Senior Notes Due Two Thousand Twenty Seven Five Year Notes [Member] 2027 Five-year Notes Unsecured Senior Notes Due Two Thousand Twenty Seven five year Notes. Unsecured Senior Notes Due Two Thousand Twenty Nine [Member] 2029 Notes Unsecured Senior Notes Due Two Thousand Twenty Nine Unsecured Senior Notes Due Two Thousand Thirty Five [Member] 2035 Notes Unsecured Senior Notes Due Two Thousand Thirty Five Unsecured Senior Notes Due Two Thousand Thirty Five Year Notes [Member] 2030 Five-year Notes Unsecured Senior Notes Due Two Thousand Thirty Five Year Notes Two Thousands Twenty Four Notes Issued On November 2018 [Member] 2024 Notes Issued On November 2018 2024 Notes Issued​ On November​ 2018 [Member]. Two Thousands Twenty Four Notes Issued On December 2018 [Member] 2024 Notes Issued​ On December​ 2018 2024 Notes Issued​ On December​ 2018 [Member] Outstanding Notes [Member] Outstanding Notes Two Thousand Thirty Two Exchangeable Bonds [Member] 2032 Exchangeable Bonds [Member] Two thousand thirty two exchangeable bonds. Debt Instrument, Frequency of Periodic Payment Payment frequency of debt interest Debt Instrument Frequency Of Periodic Interest Payment Debt Instrument, Redemption Price, Percentage Debt instrument redemption price percentage Debt Instrument, Unamortized Discount Discount on debt issued Debt Issuance Costs, Net Debt issuance cost Debt Instrument, Maturity Date Range, End Debt Instrument Convertible Conversion Ratio Basis Amount Debt Instrument Convertible Conversion Ratio Basis Amount US$1,000 Debt instrument convertible conversion ratio basis amount. Debt Instrument, Convertible, Conversion Ratio Conversion rate of convertible notes, ADS per US$1,000 Fair Value Gain Loss Recorded In Statement of Income or Comprehensive Income Fair value Fair value gain or loss recorded in statement of income or comprehensive income. Debt Instrument, Fair Value Disclosure Debt instrument, fair value Indentures [Axis] Indentures. Indentures [Domain] Indentures. Long-Term Debt, Gross Principal amount Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Unamortized discount and debt issuance costs Less: unamortized discount and debt issuance costs Long-term Debt Long-term Debt, Total Long Term Debt Maturities Repayments Of Principal [Table] Long Term Debt Maturities Repayments Of Principal [Table] Long Term Debt Maturities Repayments Of Principal [Table] Long-term Debt [Member] Long Term Debt Long Term Debt Maturities Repayments Of Principal [Line Items] Long Term Debt Maturities Repayments Of Principal [Line Items] Long Term Debt Maturities Repayments Of Principal [Line Items] Long-Term Debt, Fiscal Year Maturity [Abstract] For the years ending December 31 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2026 Long-term Debt, Maturities, Repayments of Principal in Year Two 2027 Long-term Debt, Maturities, Repayments of Principal in Year Three 2028 Long-term Debt, Maturities, Repayments of Principal in Year Four 2029 Long-term Debt, Maturities, Repayments of Principal in Year Five 2030 Long-term Debt, Maturities, Repayments of Principal after Year Five Thereafter Iqiyi Two Thousand Twenty Six Convertible Notes [Member] IQIYI 2026 Convertible Notes Iqiyi two thousand twenty six convertible notes. iQIYI Convertible Notes [Member] iQIYI Convertible Notes. Iqiyi Two Thousand Twenty Thirty Convertible Notes [Member] iQIYI 2030 Convertible Notes iQIYI Pag Convertible Notes [Member] iQIYI Pag Convertible Notes iQIYI pag convertible notes. iQIYI Two Thousand Twenty Eight Convertible Notes [Member] iQIYI 2028 Convertible Notes iQIYI PAG Convertible Senior Notes [Member] iQIYI PAG Convertible Senior Notes iQIYI PAG convertible senior notes. Debt Instrument Remaining Accretion Period Remaining Accretion Period Debt Instrument Remaining Accretion Period. Debt Instrument Accretion Of Principal Amount Over Remaining Period Principal amount of liability component Debt Instrument Accretion Of Principal Amount Over Remaining Period. Debt Instrument, Repurchase Date Debt, put date Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Percentage of principal amount of debt redeemed Debt Instrument, Convertible, Conversion Price Debt Instrument, convertible, conversion price Debt Instrument, Convertible, Threshold Trading Days Debt Instrument, convertible, threshold trading days Debt Instrument, Convertible, Threshold Consecutive Trading Days Debt instrument, convertible, threshold consecutive trading days Debt Instrument, Date of First Required Payment Debt instrument, date of first required payment Debt Instrument, Payment Terms Debt instrument, payment terms Proceeds from Debt, Net of Issuance Costs Proceeds from Debt, Net ofunderwriting discounts and offering expenses Payments of Financing Costs Payment of underwriting discounts and offering expenses Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Debt instrument convertible threshold percentage of stock price trigger Additional Debt Principal Amount Offered Additional Debt Principal Amount Offered Additional debt principal amount offered. Two Thousand Twenty Thirty Convertible Notes Maturities Repayments Debt maturities repayments in 2030 Two thousand twenty thirty convertible notes maturities repayments. Two Thousand Twenty Eight Convertible Notes Maturities Repayments Debt maturities repayments in 2028 Two thousand twenty eight convertible notes maturities repayments. Two Thousand Twenty Six Convertible Notes Maturities Repayments Debt maturities repayments in 2026 Two thousand twenty six convertible notes maturities repayments. Convertible Notes Payable Remained outstanding amount of convertible notes Debt Instrument, Repurchased Face Amount Aggregate principal amount of the 2026 notes outstanding Debt instrument repurchased face amount Interest Cost Recognized During The Period Interest cost recognized during the period Total Interest cost recognized during the period. Convertible Senior Notes Rate Stated Percentage Convertible senior notes rate stated percentage Convertible senior notes rate stated percentage. Debt instrument repurchase price rate Debt instrument repurchase price rate Debt instrument repurchase price rate. Option Indexed to Issuer's Equity, Type [Axis] Option Indexed to Issuer's Equity, Type [Axis] Option Indexed to Issuer's Equity, Type [Domain] Option Indexed to Issuer's Equity, Type [Domain] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Conversion Description [Axis] Debt Conversion, Name [Domain] Prior To June 15 2026 Debt Conversion Condition One [Member] Prior To June 15 2026 Debt Conversion Condition One Prior to june 15 2026 debt conversion condition one. Prior To June 15 2026 Debt Conversion Condition Two [Member] Prior To June 15 2026 Debt Conversion Condition Two Prior to june 15 2026 debt conversion condition two. Prior to On or after March 20, 2028 Debt Conversion Condition [Member] Prior to On or after March 20, 2028 Debt Conversion Condition [Member] Prior to September 15, 2029 Debt Conversion Condition Two [Member] Prior to September 15, 2029 Debt Conversion Condition Two [Member] Prior to September 15, 2029 Debt Conversion Condition One [Member] Prior to September 15, 2029 Debt Conversion Condition One [Member] Prior To September 15 2027 Debt Conversion Condition Two [Member] Prior To September 15 2027 Debt Conversion Condition Two Prior to On or after March 20 2026 Debt Conversion Condition One [Member] Prior to On or after March 20 2026 Debt Conversion Condition One Prior to On or after March 20 2026 Debt Conversion Condition [Member] Prior to On or after March 20 2026 Debt Conversion Condition Prior To September 15 2027 Debt Conversion Condition One [Member] Prior To September 15 2027 Debt Conversion Condition One Debt Instrument Debt Default Event Trigger [Axis] Debt Instrument Debt Default Event Trigger. Debt Instrument Debt Default Event Trigger [Domain] Debt Instrument Debt Default Event Trigger. Debt Instrument Debt Default Event [Axis] Debt Instrument Debt Default Event. Debt Instrument Debt Default Event [Domain] Debt Instrument Debt Default Event. Short-Term Debt, Type [Axis] Short-Term Debt, Type [Domain] Convertible Debt [Member] SRT Cumulative Effect Period of Adoption [Axis] SRT cumulative effect period of adoption. SRT Cumulative Effect Period of Adoption [Domain] SRT cumulative effect period of adoption. SRT Cumulative Effect Period Of Adoption Adjustment [Member] SRT Cumulative Effect Period Of Adoption Adjustment SRT cumulative effect period of adoption adjustment. Period [Axis] Period. Period [Member] Period. On Or After Fifth Anniversary [Member] On or After Fifth Anniversary On or after fifth anniversary. On Or After Third Anniversary [Member] On or After Third Anniversary On or after third anniversary. Cumulative Effect, Period of Adoption, Adjustment [Member] Cumulative Effect, Period of Adoption, Adjustment Convertible Notes Payable, Noncurrent Net carrying amount Amortization of Debt Issuance Costs and Discounts Amortization of the discount and issuance costs Senior Convertible Notes [Member] Senior Convertible Notes Senior convertible notes member. Operating Lease, Payments Cash payments for operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability ROU assets obtained in exchange for operating lease liabilities Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months 2026 Lessee, Operating Lease, Liability, Payments, Due Year Two 2027 Lessee, Operating Lease, Liability, Payments, Due Year Three 2028 Lessee, Operating Lease, Liability, Payments, Due Year Four 2029 Lessee, Operating Lease, Liability, Payments, Due Year Five 2030 Lessee, Operating Lease, Liability, Payments, Due after Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due Total future lease payments Lessee, Operating Lease, Liability, Undiscounted Excess Amount Less: Imputed interest Operating Lease, Liability Total lease liability balance Operating Lease, Weighted Average Remaining Lease Term Operating lease, weighted average remaining lease term Operating Lease, Weighted Average Discount Rate, Percent Operating lease, weighted average discount rate Short-term Lease, Cost Short-term lease cost Operating Lease, Cost Operating lease cost Income Taxes [Table] Income Taxes [Table] Income Taxes [Table] Expiration Dates [Axis] Expiration Dates [Axis] Expiration Dates [Axis] Expiration Date [Domain] Expiration Date [Domain] Expiration Date [Domain] Income Tax Authority, Name [Axis] Income Tax Authority, Name [Axis] Income Tax Authority, Name [Domain] Income Tax Authority, Name [Domain] Income Taxes [Line Items] Income Taxes [Line Items] Income Taxes [Line Items] Corporate Income Tax Rate Income tax rate Percentage of statutory corporate income tax rate applicable to pretax income (loss). Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Unified statutory income tax rate under current EIT law Expected taxation at PRC statutory tax rate, percent Income Tax Preferential Tax Rate A preferential enterprise income tax rate Represents the preferential tax rate applicable to entities entitled to the preferential tax treatment according to PRC government authorities. Statutory Withholding Tax Rate For Dividend PRC statutory withholding tax rate to which dividends paid by a FIE to any of its foreign non-resident enterprise investors The statutory withholding tax rate to which dividends paid by a foreign-invested enterprise onshore China to any of its foreign non-resident enterprise investors offshore are subject. Special Withholding Tax Rate For Dividend PRC special withholding tax rate to which dividends paid by a FIE to its foreign non-resident enterprise investors in Hong Kong The special withholding tax rate to which dividends paid by a foreign-invested enterprise onshore in China to any of its Hong Kong non-resident enterprise investors offshore are subject. These Hong Kong investors must meet the requirements stipulated by China's tax regulations. Statutory Withholding Tax Rate For Capital Gains Statutory withholding tax rate for capital gains Statutory Withholding Tax Rate For Capital Gains Operating Loss Carryforwards Net losses deriving from entities in the PRC and Hong Kong Net Operating Loss Carryforward Period Net operating loss carryforward period Net Operating Loss Carryforward Period Net Operating Loss Carryforwards Begins To Expire Net operating loss carryforwards begins to expire Net Operating Loss Carryforwards Begins To Expire Deferred Tax Liability Undistributed Foreign Earnings Accrued withholding tax The amount of deferred tax liability accrued in the current period which attributable to taxable temporary differences from undistributed earnings of subsidiaries and other recognized entities not within the country of domicile of the entity. Foreign Income Tax Expense (Benefit), Continuing Operations Unrecognized Tax Benefits Unrecognized tax benefits Baidu HK [Member] Baidu HK Baidu HK [Member] Certain PRC Subsidiaries and VIEs [Member] Certain PRC Subsidiaries and VIEs Certain PRC subsidiaries and VIEs. Preferential Tax Rate [Axis] Preferential Tax Rate [Axis] Preferential tax rate. Preferential Tax Rate [Domain] Preferential Tax Rate [Domain] Preferential Tax Rate [Domain] High And New Technology Enterprise [Member] High And New Technology Enterprise High And New Technology Enterprise [Member] Tax Period [Axis] Tax Period [Axis] Tax Period [Domain] Tax Period [Domain] Outside Chinese Mainland Jurisdictions [Member] Other Noncurrent Liabilities [Member] Other non-current liabilities Income Loss From Continuing Operations Before Income Taxes Minority Interest By Jurisdiction [Abstract] Income Loss From Continuing Operations Before Income Taxes Minority Interest By Jurisdiction [Abstract] Income (Loss) from Continuing Operations before Income Taxes, Domestic Chinese mainland Income (Loss) from Continuing Operations before Income Taxes, Foreign Non-Chinese mainland Current Income Tax Expense (Benefit) Current income tax Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability Adjustments of deferred tax assets due to change in tax rates Deferred Income Tax Expense (Benefit) Exclude Adjustments Due To Reduced Tax Rates Deferred income tax expense (benefit) Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations exclude adjustments of deferred tax assets due to reduced tax rates. Effective Income Tax Rate Reconciliation [Table] Foreign Tax Jurisdiction, Other [Member] CAYMAN ISLANDS HONG KONG Effective Income Tax Rate Reconciliation [Line Items] Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Expected taxation at PRC statutory tax rate Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Effect of differing tax rates in different jurisdictions Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount Non-taxable income Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount Non-deductible expenses Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Research and development super-deduction Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Effect of tax rate changes on deferred taxes Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount Reversal of prior year's income taxes Income Tax Reconciliation PRC Withholding Tax PRC withholding tax Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from the dividends from domestic entities to foreign entities. Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Change in valuation allowance Effective Income Tax Rate Reconciliation, Percent Income tax expense, percent Effect Of PRC Preferential Tax Rates And Tax Holiday Effect of PRC preferential tax rates and tax holiday Effect of PRC preferential tax rates and tax holiday. Effect Of Changes In Tax Laws Or Rates Enacted In The Current Year Effect of changes in tax laws or rates enacted in the current year Effect of changes in tax laws or rates enacted in the current year. Income Tax Reconciliation Non Deductible Expense Expected Credit Losses Expected credit losses Income tax reconciliation non deductible expense expected credit losses. Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount [Abstract] Other adjustments Effective Income Tax Rate Reconciliation Effect Of Tax Holidays Inside PRC Percent Effect of tax holidays inside PRC, percent Effective income tax rate reconciliation effect of tax holidays inside PRC percent. Effective Income Tax Rate Reconciliation, Other Reconciling Items, Percent Others, percent Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent Tax incentives relating to R&D expenditures, percent Effective Income Tax Reconciliation PRC Withholding Tax Withholding tax on PRC subsidiaries' undistributed earnings, percent Effective income tax reconciliation prc withholding tax. Effective Income Tax Rate Reconciliation Unrecognized Tax Benefits Changes in unrecognized tax benefits, percent Effective income tax rate reconciliation unrecognized tax benefits. Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount [Abstract] Nontaxable or nondeductible items Effective Income Tax Rate Reconciliation Non Deductible Expense Expected Credit Losses Expected credit losses, percent Effective income tax rate reconciliation non deductible expense expected credit losses. Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent Others, percent Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Percent Share-based compensation expenses, percent Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent Non-deductible expenses, percent Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent Non-taxable income, percent Income Tax Reconciliation Foreign Reconciling Items [Abstract] Effective Income Tax Rate Reconciliation Effect Of Tax Rate Change On Deferred Tax Effect of changes in tax laws or rates enacted in the current year, percent Effective income tax rate reconciliation effect of tax rate change on deferred tax. Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Change in valuation allowance, percent Effective Income Tax Rate Reconciliation, Cross-Border Tax Effect, Percent Effect of cross-border tax laws, percent Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Effect of tax rate changes on deferred taxes, percent Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Others, percent Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Statutory tax rate difference between PRC and other jurisdictions, percent Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Others Income Tax Reconciliation Unrecognized Tax Benefits Changes in unrecognized tax benefits Income tax reconciliation unrecognized tax benefits. Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Others Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount Share-based compensation expenses Effective Income Tax Rate Reconciliation, Cross-Border Tax Effect, Amount Effect of cross-border tax laws Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Others Components of Deferred Tax Assets and Liabilities [Abstract] Deferred Tax Assets, Net [Abstract] Deferred tax assets: Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts Allowance for credit losses Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other Accrued expenses, payroll and others Deferred Tax Assets, Operating Loss Carryforwards Net operating loss carry-forwards Deferred Tax Assets, Valuation Allowance Less: valuation allowance Deferred Tax Assets, Net of Valuation Allowance Deferred tax assets, net Deferred Tax Assets Operating Lease Liability Operating lease liabilities Deferred tax assets operating lease liability. Deferred Tax Assets Property Plant And Equipment And Intangible Assets Fixed assets depreciation and intangible assets amortization Deferred tax assets property, plant and equipment and intangible assets. Deferred Tax Liabilities, Net [Abstract] Deferred tax liabilities: Deferred Tax Liabilities, Undistributed Foreign Earnings PRC withholding tax Deferred Tax Liabilities, Tax Deferred Income Tax on capital gains Deferred Tax Liabilities, Other Others Deferred Tax Liabilities, Gross Deferred tax liabilities Deferred Tax Liabilities Operating Lease Right Of Use Asset Operating lease right-of-use asset Deferred tax liabilities operating lease right of use asset. Employee Defined Contribution Plan Amounts Expensed Amounts incurred for employee defined contribution plan Full time employees of the Group in the PRC participate in a government mandated multi-employer defined contribution plan pursuant to which certain pension benefits, medical care, unemployment insurance, employee housing fund and other welfare benefits are provided to employees.The line item represents the total amounts expensed as incurred for such employee defined contribution plan. Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Commitment And Contingencies [Axis] Commitment And Contingencies [Axis] Commitment And Contingencies [Axis] Commitment And Contingencies [Domain] Commitment And Contingencies [Domain] Commitment And Contingencies [Domain] Obligations [Member] Obligations related to the entity's directors and officers Commitments and Contingencies Disclosure [Line Items] Commitments and Contingencies Disclosure [Line Items] Commitments and Contingencies Disclosure [Line Items] Purchase Obligation Capital commitments contracted not yet reflected in financial statements Investment Commitments Investment commitments Investment commitments. Category of Item Purchased [Axis] Category of Item Purchased [Axis] Long-term Purchase Commitment, Category of Item Purchased [Domain] Long-term Purchase Commitment, Category of Item Purchased [Domain] Network Infrastructure And Buildings [Member] Network Infrastructure and Buildings Network Infrastructure And Buildings [Member] Future Minimum Payments Under Noncancelable Agreements For Bandwidth And Property Management Fees [Abstract] Future minimum payments under non-cancelable agreements for bandwidth and property management fees. Future Minimum Payments Under Noncancelable Agreements For Bandwidth And Property Management Fees Current Due In Fourth Year 2029 Future ​minimum​ payments​ under​ noncancelable​ agreements​ for​ bandwidth​ and ​property ​management​ fees​ current due in fourth year. Future Minimum Payments Under Noncancelable Agreements For Bandwidth And Property Management Fees Current Due In Fifth Year 2030 Future​ minimum​ payments​ under​ noncancelable​ agreements​ for​ bandwidth​ and​ property​ management​ fees​ current due in fifth year. Future Minimum Payments Under Noncancelable Agreements For Bandwidth And Property Management Fees Current After Fifth Year Thereafter Future minimum payments under noncancelable agreements for bandwidth and property management fees current after fifth year. Future Minimum Payments Under Noncancelable Agreements For Bandwidth And Property Management Fees Total Future minimum payments under non-cancelable agreements for bandwidth and property management fees Future minimum payments under non-cancelable agreements for bandwidth and property management fees. Future Minimum Payments Under Noncancelable Agreements For Bandwidth And Property Management Fees Current Due In Third Year 2028 Future minimum payments under noncancelable agreements for bandwidth and property management fees current due in third year. Future Minimum Payments Under Noncancelable Agreements For Bandwidth And Property Management Fees Current Due In Second Year 2027 Future minimum payments under noncancelable agreements for bandwidth and property management fees current due in second year. Future Minimum Payments Under Noncancelable Agreements For Bandwidth And Property Management Fees Current Due In Next Twelve Months 2026 Future minimum payments under non-cancelable agreements for bandwidth and property management fees current due in next twelve months. Purchase Obligation, Fiscal Year Maturity [Abstract] Schedule Of Contractual Commitments [Table] Schedule Of Contractual Commitments [Table] Schedule Of Contractual Commitments [Table] Commitment And Contingencies [Line Items] Commitment And Contingencies [Line Items] Commitment And Contingencies [Line Items] Future Minimum Payments For Noncancelable Licensed Copyrights and Produced Content fees Future Minimum Payments For Noncancelable Licensed Copyrights and Produced Content fees Future minimum payments for non cancelable Licensed Copyrights and Produced Content agreements. Future Minimum Payments For Noncancelable Licensed Copyrights And Produced Content Fees Due In Next Twelve Months 2026 Future minimum payments for non cancelable Licensed Copyrights and Produced Content agreements in next fiscal year following current fiscal year. Future Minimum Payments For Noncancelable Licensed Copyright sand Produced Content fees Due In Third Year 2028 Future minimum payments for non cancelable Licensed Copyrights and Produced Content agreements in third fiscal year following current fiscal year. Future Minimum Payments For Noncancelable Licensed Copyrights And Produced Content fees Due In FourthYear 2029 Future minimum payments for non cancelable Licensed Copyrights and Produced Content agreements in fourth fiscal year following current fiscal year. Future Minimum Payments For Noncancelable Licensed Copyrights And Produced Content fees Due In Fifth Year 2030 Future minimum payments for non cancelable Licensed Copyrights and Produced Content agreements in fifth year following current fiscal year. Future Minimum Payments For Noncancelable Licensed Copyright sand Produced Content fees Due After Fifth Year Thereafter Future minimum payments for non cancelable Licensed Copyrights and Produced Content agreements after fifth fiscal year following current fiscal year. Future Minimum Payments For Noncancelable Licensed Copyright sand Produced Content fees Due In Second Year 2027 Future minimum payments for non cancelable Licensed Copyrights and Produced Content agreements in second fiscal year following current fiscal year. Copyrights [Member] Licensed copyrights Temporary Equity, Stock Issued During Period, Value, New Issues Issuance of subsidiaries' shares Redeemable Preferred Stock Repurchased And Retired During Period Value From Minority Stockholder Repurchase of redeemable noncontrolling interests Equity impact of the value of redeemable preferred stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital). Accretion Of Redeemable Non Controlling Interests Accretion of redeemable noncontrolling interests Accretion of redeemable noncontrolling interests. Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests [Abstract] Redeemable Noncontrolling Interest, by Legal Entity [Table] Redeemable Noncontrolling Interest, by Legal Entity [Table] Certain Subsidiary 1 [Member] Certain subsidiary 1 Certain subsidiary 1. Certain Subsidiary 2 [Member] Certain subsidiary 2 Certain subsidiary 2. Redeemable Noncontrolling Interest [Line Items] Redeemable Noncontrolling Interest [Line Items] Stock Repurchased During Period, Shares Stock repurchased during period, shares Number of Class A ordinary shares repurchased Preferred Stock Shares Issued During Period Preferred stock shares issued during the period Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury) during the period. May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. Redeemable Non Controlling Interests [Member] Redeemable Non-controlling Interests Stockholders Equity Note [Table] Stockholders Equity Note [Table] Stockholders Equity Note [Table] Preferred Stock [Member] Preferred Stock Stockholders Equity Note [Line Items] Stockholders Equity Note [Line Items] Stockholders Equity Note [Line Items] Preferred Stock, Shares Authorized Preferred stock, shares authorized Common Stock, Voting Rights Number of votes per share Stock Transferred From Class B To Class A Transfer of Class B ordinary shares to Class A Ordinary shares The number of shares transferred from Class B to Class A during the period. Stock Repurchase Program Proposed Authorized Amount Stock repurchase program, proposed aggregate value Stock repurchase program proposed authorized amount. Appropriation Of After Tax Profit To Statutory Surplus Fund Required Minimum Percentage Allocation of after-tax profits to statutory surplus fund, percentage Represents the minimum percentage of after-tax profit as reported in the PRC statutory accounts required to be appropriated towards the statutory surplus fund for VIEs until the reserve balance reaches a specified percentage of registered capital. Appropriation Of After Tax Profit To Statutory Surplus Fund Limit Registered Capital Percentage Limit of statutory surplus fund as a percentage of registered capital, after which allocations to statutory surplus fund are no longer required Represents the ratio of the statutory surplus fund to statutory registered capital after which mandatory contributions to the statutory surplus fund are no longer required for VIEs of the company. Amount Of Restricted Paid Up Capital And Statutory Reserve Funds Of Subsidiaries And Net Assets Of Variable Interest Entities Amounts of restricted paid up capital and statutory reserve funds of PRC subsidiaries and net assets of VIEs Amount of restricted paid up capital and statutory reserve funds of PRC subsidiaries and net assets of VIEs as of the end of the most recently completed fiscal year. Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Foreign currency translation adjustment Shares Authorized Shares authorized Shares Authorized including common stock shares authorized and Preferred Stock shares authorized. Stock Repurchased During Period, Value Repurchase of ordinary shares Treasury Stock, Shares, Retired Stock retired during period, shares Number Of Shares That Are Being Held In Treasury At The End Of The Year Balance number of Treasury stock, shares Number of shares that are being held in treasury at the end of the year. Stock Issued During Period exercise of share options and vesting of restricted shares Stock Issued During Period exercise of share options and vesting of restricted shares Stock Issued During Period exercise of share options and vesting of restricted shares. Share Repurchase Program [Axis] Share Repurchase Program [Domain] Twenty Twenty Six Shares Repurchase Program [Member] 2026 Shares Repurchase Program Twenty Twenty Three Shares Repurchase Program [Member] 2023 Shares Repurchase Program Twenty twenty three shares repurchase program. Retained Earnings (Accumulated Deficit) [Abstract] Retained Earnings (Accumulated Profit/Earnings) Retained Earnings, Appropriated PRC statutory reserve funds Retained Earnings, Unappropriated Unreserved retained earnings Other Comprehensive Income (Loss), Tax [Abstract] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Other comprehensive income (loss) before reclassification Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Amounts reclassified from accumulated other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Other comprehensive income (loss) attribute to noncontrolling interests and redeemable noncontrolling interests Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Foreign currency translation adjustment Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Unrealized gains (losses) on available- for-sale investments Unrealized Gains On Derivatives [Member] Unrealized gains (losses) on derivatives Unrealized Gains On Derivatives [Member] Other Comprehensive Income (Loss), Available-for-sale Securities, before Reclassification Adjustments, Tax Unrealized losses on available-for-sale investments Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Numerator Accretion of Redeemable Noncontrolling Interest Accretion of the redeemable noncontrolling interests Accretion of redeemable noncontrolling interest. Impact Of Diluted Securities Of Subsidiaries And Equity Method Investees Impact of diluted securities of subsidiaries and equity method investees Impact of diluted securities of subsidiaries and equity method investees. Net Income (Loss) Available to Common Stockholders, Diluted Numerator for diluted EPS computation Net Income (Loss) Available to Common Stockholders, Basic Numerator for basic EPS computation Allocation of net income attributable to Baidu, Inc. Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Table] Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Table] Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Table] Earnings Per Share [Axis] Earnings Per Share [Axis] Earnings Per Share [Axis] Earnings Per Share [Domain] Earnings Per Share [Domain] Earnings Per Share [Domain] Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items] Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items] Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items] Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Numerator Undistributed Earnings, Basic Allocation of net income attributable to Baidu, Inc. for diluted computation Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities Reallocation of net income attributable to Baidu, Inc. as a result of conversion of Class B to Class A shares Weighted Average Number of Shares Outstanding, Diluted [Abstract] Denominator Incremental Common Shares Attributable To Conversion Of Class Of Securities Conversion of Class B to Class A ordinary shares Incremental Common Shares Attributable To Conversion Of Class Of Securities Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Share-based awards Weighted Average Number of Shares Outstanding, Basic [Abstract] Denominator Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Restricted Stock [Member] Restricted Stock Parent Company [Member] Parent Company Other Subsidiaries [Member] Other Subsidiaries Other Subsidiaries [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Two Thousand And Eight Stock Incentive Plan [Member] 2008 Plan Two thousand and eight stock incentive plan. Two Thousand And Ten Stock Incentive Plan [Member] 2010 Equity Incentive Plan Two thousand and ten stock incentive plan. Two Thousand And Eighteen Stock Incentive Plan [Member] Stock Incentive Plan 2018 Two thousand and eighteen stock incentive plan. Two Thousand And Four One Equity Incentive Plan [Member] 2024 Equity Incentive Plan Two Thousand And Four One Equity Incentive Plan. Two Thousand Twenty Three Share Incentive Plan [Member] 2023 Share Incentive Plan Two thousand twenty three share incentive plan. Two Thousand Ten And Two Thousand Twenty One Equity Incentive Plan [Member] 2010 and 2021 Equity Incentive Plan 2010 and 2021 Equity incentive plan. Two Thousand And Twenty One Equity Incentive Plan [Member] 2021 Equity Incentive Plan Two thousand and twenty one equity incentive plan [Member]. Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Number of shares authorized for issuance Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Contractual term of share-based awards granted Minimum Percentage of Voting Power of Entitys Share Capital Percentage of voting power The minimum percentage of voting power held by an employee whose granted incentive share option's term are subject to a maximum of five years, and the exercise price cannot be less than 110% of the fair market value of the company's ordinary shares on the date of that grant. Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Shares vesting term Exercise Price as Percentage of Fair Value of Common Stock Percentage of the fair market value of the entity's ordinary shares The minimum percentage of a share option's exercise over the fair value of the ordinary share on the date of that grant. Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Total intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value Total fair value of options vested Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Unrecognized share-based compensation cost Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition A weighted-average vesting period over which the deferred cost is expected to be recognized Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value The weighted-average grant-date fair value of options granted during respective years Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Total fair value of shares vested during respective years, restricted shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value The weighted-average grant-date fair value of restricted shares granted during respective years Granted Share Based Compensation, Reduction in Number of Shares Available for Future Grants due to Issuance of Each Restricted Share Unit Reduction is ordinary shares for issuance of each restricted stock unit Share based compensation, reduction in number of shares available for future grants due to issuance of each restricted share unit. Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Granted Employee Holding No More Than Ten Percent Voting Power [Member] Employee Holding No More Than Ten Percent Voting Power Employee Holding No More Than Ten Percent Voting Power [Member] Employee Holding More Than Ten Percent Voting Power [Member] Employee Holding More Than Ten Percent Voting Power Employee Holding More Than Ten Percent Voting Power [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Revision of Prior Period, Reclassification, Adjustment [Member] Revision of Prior Period, Reclassification, Adjustment Plan Modification [Axis] Plan Modification [Axis] Plan Modification [Domain] Plan Modification [Domain] Original Term [Member] Original Term Original Term [Member] Modified Term [Member] Modified Term Modified Term [Member] US GAAP Plan Name [Axis] US GAAP plan name US GAAP Plan Name [Domain] US GAAP plan Name. Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Weighted average remaining contractual life (Years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Outstanding Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Vested and expected to vest at December 31, 2025 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Exercisable at December 31, 2025 Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value [Abstract] Aggregate intrinsic value (US$ in millions) Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Vested and expected to vest at December 31, 2025 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Exercisable at December 31, 2025 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Number of share options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Outstanding, December 31, 2024 Outstanding, December 31, 2025 Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Forfeited/Cancelled Forfeited / Expired Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Weighted average exercise price (US$) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Outstanding, December 31, 2024 Outstanding, December 31, 2025 Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Exercised Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Forfeited/Cancelled Forfeited / Expired Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Vested and expected to vest at December 31, 2025 Vested and expected to vest at December 31, 2025 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Exercisable at December 31, 2025 Exercisable at December 31, 2025 Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Vested and expected to vest at December 31, 2025 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Exercisable at December 31, 2025 Share based Compensation Arrangement Assumptions Used to Estimate Fair Values of Share Options Granted [Table] Share based Compensation Arrangement Assumptions Used to Estimate Fair Values of Share Options Granted [Table] Share based Compensation Arrangement Assumptions Used to Estimate Fair Values of Share Options Granted [Table] Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology [Line Items] Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology [Line Items] Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Risk-free interest rate, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Risk-free interest rate, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Expected volatility range, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Expected volatility range, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected life Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Restricted Shares Roll Forward - Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Unvested, December 31, 2024 Unvested, December 31, 2025 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Forfeited/Cancelled Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Restricted Shares Roll Forward - Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Unvested, December 31, 2024 Unvested, December 31, 2025 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Forfeited/Cancelled Allocated Share-based Compensation Expense Share-based compensation expense Cost of Sales [Member] Cost of revenue Selling, General and Administrative Expenses [Member] Selling, general and administrative Research and Development Expense [Member] Research and development Related Party Transactions With Investees [Table] Related Party Transactions With Investees [Table] Related party transactions with investees table. Related Party Transactions With Investees and Others [Line Items] Related Party Transactions With Investees and Others [Line Items] Related party transactions with investees and others line items. Related Party Transactions With Others [Abstract] Related Party Transactions With Investees [Abstract] Related Party Transactions With Investees Related Party Transaction, Purchases from Related Party Purchased from related parties Related Party Investees [Member] Related Party Investees Related Party C [Member] Related Party C Related Party C [Member]. Related Party [Member] Related Party Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party A [Member] Related Party A Related Party B [Member] Related Party B Related Party B. Nonconsolidated Investees, Other [Member] Other Investees Related Party D [Member] Related Party D Related Party D . Related Party Transaction [Line Items] Related Party Transaction [Line Items] Revenue From Related Parties [Abstract] Revenue: Other Receivables, Net, Current [Abstract] Amounts due from related parties, current: Other Receivable, after Allowance for Credit Loss, Noncurrent [Abstract] Amounts due from related parties, non-current: Other Liabilities, Current [Abstract] Amounts due to related parties, current: Other Liabilities, Noncurrent [Abstract] Amounts due to related parties, non-current: Other Related Parties [Member] Other Related Parties Other Related Parties [Member] Number of Operating Segments Number of operating segments Operating Segments [Member] Operating Segments Intersegment Eliminations [Member] Intersegment Eliminations & Adjustments Baidu Core Business [Member] Baidu General Business Baidu core business. Disaggregation of Revenue [Abstract] Disaggregation of Revenue [Table] Online Marketing Services [Member] Online marketing services Online marketing services. Other Revenue Other [Member] Others Other Revenue Other. Disaggregation of Revenue [Line Items] Revenue from Contract with Customer, Including Assessed Tax Revenue Disclosure Reconciliation Of Changes In Fair Value [Abstract] Disclosure Reconciliation Of Changes In Fair Value [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Accounts Payable and Accrued Liabilities [Member] Accounts Payable and Accrued Liabilities Amounts Due To Related Parties current [Member] Amounts Due To Related Parties current Amounts Due To Related Parties current. Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Cash Equivalents [Member] Cash Equivalents Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Time deposits, Fair Value Disclosure Time deposits Time deposits, Fair Value Disclosure Notes Payable Current Portion Fair Value Disclosure Notes payable, current portion Notes payable current portion fair value disclosure. Convertible Debt Non Current Portion Fair Value Disclosures Convertible senior notes, non-current portion Convertible debt non current portion fair value disclosures. Notes Payable Non Current Portion Fair Value Disclosure Notes payable, non-current portion Notes payable non current portion fair value disclosure. Notes Payable Other Than Two Thousand Thirty Two Exchangeable Bonds Notes payable other than 2032 Exchangeable Bonds Notes payable other than two thousand thirty two exchangeable bonds. Long-Term Debt, Current Maturities Convertible senior notes, current portion Long Term Time Deposits And Held To Maturity Investments Fair Value Disclosure Long-term time deposits and held-to-maturity investments Long-term time deposits and held-to-maturity investments in Fair Value Disclosure. Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis [Abstract] Fair value measurements on a recurring basis Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis [Abstract] Equity Securities, FV-NI Equity investments at fair value with readily determinable fair value Derivative Asset, Noncurrent Derivative instruments, Non - Current Assets, Fair Value Disclosure Total assets measured at fair value Financial Liabilities Due To A Related Party Financial liability Fair value of non-current financial liabilities due to a related party. Financial and Nonfinancial Liabilities, Fair Value Disclosure Total liabilities measured at fair value Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration] Notes Payable, Noncurrent 2032 Exchangeable Bonds Accounts Payable and Accrued Liabilities, Noncurrent Derivative instruments Derivative Asset, Current Derivative instruments, Current Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 Other Long-Term Investments [Member] Long-term investments BIDUInvestment [Axis] BIDUInvestment [Domain] Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract] Investment Accounted for at Fair Value [Member] Investment Accounted for at Fair Value Investment accounted for at fair value. Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Begining Balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Additions Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Disposals Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Foreign Currency Translation Adjustment Foreign currency translation adjustments Fair value, measurement with unobservable inputs reconciliation, recurring basis, asset foreign currency translation adjustment. Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Net unrealized fair value decrease (increase) recognized in earnings Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Available-for-sale Securities [Member] Available-for-sale Debt Investments Available For Sale Debt Securities Noncurrent Translation Adjustments Foreign currency translation adjustments Available for sale debt securities noncurrent translation adjustments. Available For Sale Debt Securities Accrued Interest Accrued interest Available For Sale Debt Securities Accrued Interest. Fair Value Measurement With Unobservable Input Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss Net unrealized fair value change recognized in other comprehensive income (loss) Fair value measurement with unobservable inputs reconciliation recurring basis asset gain loss Included in other comprehensive income loss. Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Net unrealized fair value change Fair value measurement with unobservable inputs reconciliation recurring basis asset gain loss. Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Conversion Investments, Fair Value Disclosure Long-term investments Impairment Of Long Term Investment Long-term investments Impairment of long term investment. Produced Content Monetized On Its Own Fair Value Disclosure Produced contents monetized on its own Produced content monetized on its own fair value disclosure. Impairment Of Produced Content Monetized On Its Own Produced contents monetized on its own Impairment of produced content monetized on its own. Long Lived Assets In Core Asset Group Fair Value Disclosure Core asset group as of September 30, 2025 Long lived assets in core asset Group fair value disclosure. Impairment of Long Lived Assets In Core Asset Group Core asset group as of September 30, 2025 Impairment of long lived assets in Core asset group. Long Lived Assets [Member] Long lived assets. Measurement Frequency [Axis] Measurement Frequency [Domain] Produced Content [Member] Produced Content