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Organization, Consolidation and Presentation of Financial Statements - Additional Information (Detail) In Millions, unless otherwise specified | 1 Months Ended | 12 Months Ended
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Dec. 31, 2014 USD ($) | Dec. 31, 2014 CNY | Dec. 31, 2014 Baidu Netcom CNY | Dec. 31, 2014 Beijing Perusal CNY | Dec. 31, 2014 Baidu Pay CNY
Variable Interest Entity [Line Items] |  |  |  |  |
Interest-free loans provided by a subsidiary of the entity to the shareholders of its variable interest entities |  |  | 100.0 bidu_InterestFreeLoansProvidedBySubsidiaryOfEntityToShareholdersOfItsVariableInterestEntities / dei_LegalEntityAxis = bidu_BaiduNetcomMember | 20.0 bidu_InterestFreeLoansProvidedBySubsidiaryOfEntityToShareholdersOfItsVariableInterestEntities / dei_LegalEntityAxis = bidu_BeijingPerusalMember | 31.5 bidu_InterestFreeLoansProvidedBySubsidiaryOfEntityToShareholdersOfItsVariableInterestEntities / dei_LegalEntityAxis = bidu_BaiduPayMember
Equity pledge agreement expiration period |  |  | 2 years | 2 years | 2 years
Net liabilities of VIEs | $ 56.36 us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet | 349.67 us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet |  |  |
Creditors of the VIEs'third-party liabilities with no recourse to the general credit of the primary beneficiaries | No | No |  |  |
Exchange rate used for conversion of financial statements from RMB to US dollar | 6.2046 us-gaap_ForeignCurrencyExchangeRateTranslation1 | 6.2046 us-gaap_ForeignCurrencyExchangeRateTranslation1 |  |  |

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- Definition 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. + References No definition available. + Details
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- Definition 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. + References No definition available. + Details
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Namespace Prefix: | bidu_
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Balance Type: | debit
Period Type: | instant

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- Definition Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521 + Details
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- Definition The net carrying amount of the consolidated Variable Interest Entity's assets and liabilities included in the reporting entity's statement of financial position. + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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- Definition A statement by the reporting entity that the creditors (or beneficial interest holders) of the consolidated Variable Interest Entity (VIE) have no recourse to the general credit of the primary beneficiary. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=28200181&loc=d3e5710-111685 + Details
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- Details
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