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Commitment and Contingencies - Additional Information (Detail) |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2014 Network Infrastructure and Buildings USD ($) | Dec. 31, 2014 Network Infrastructure and Buildings CNY | Dec. 31, 2014 Office USD ($) | Dec. 31, 2014 Office CNY | Dec. 31, 2013 Office CNY | Dec. 31, 2012 Office CNY | Dec. 31, 2014 IDC Facilities USD ($) | Dec. 31, 2014 IDC Facilities CNY | Dec. 31, 2013 IDC Facilities CNY | Dec. 31, 2012 IDC Facilities CNY | Dec. 31, 2014 Obligations related to the entity's directors and officers USD ($) | Dec. 31, 2014 Obligations related to the entity's directors and officers CNY | Dec. 31, 2013 Obligations related to the entity's directors and officers CNY
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Capital commitments contracted not yet reflected in financial statements | $ 182,120,000 us-gaap_PurchaseObligation / bidu_CommitmentAndContingenciesAxis = bidu_NetworkInfrastructureAndBuildingsMember | 1,130,000,000 us-gaap_PurchaseObligation / bidu_CommitmentAndContingenciesAxis = bidu_NetworkInfrastructureAndBuildingsMember |  |  |  |  |  |  |  |  |  |  |
Total operating lease expense |  |  | 84,660,000 us-gaap_OperatingLeasesRentExpenseNet / bidu_CommitmentAndContingenciesAxis = bidu_OfficeMember | 525,310,000 us-gaap_OperatingLeasesRentExpenseNet / bidu_CommitmentAndContingenciesAxis = bidu_OfficeMember | 284,580,000 us-gaap_OperatingLeasesRentExpenseNet / bidu_CommitmentAndContingenciesAxis = bidu_OfficeMember | 196,590,000 us-gaap_OperatingLeasesRentExpenseNet / bidu_CommitmentAndContingenciesAxis = bidu_OfficeMember | 459,340,000 us-gaap_OperatingLeasesRentExpenseNet / bidu_CommitmentAndContingenciesAxis = bidu_FacilityMember | 2,850,000,000 us-gaap_OperatingLeasesRentExpenseNet / bidu_CommitmentAndContingenciesAxis = bidu_FacilityMember | 1,940,000,000 us-gaap_OperatingLeasesRentExpenseNet / bidu_CommitmentAndContingenciesAxis = bidu_FacilityMember | 1,070,000,000 us-gaap_OperatingLeasesRentExpenseNet / bidu_CommitmentAndContingenciesAxis = bidu_FacilityMember |  |  |
Fair value of indemnification obligations related to the entity's directors and officers |  |  |  |  |  |  |  |  |  |  | $ 0 us-gaap_GuaranteesFairValueDisclosure / bidu_CommitmentAndContingenciesAxis = us-gaap_ObligationsMember | 0 us-gaap_GuaranteesFairValueDisclosure / bidu_CommitmentAndContingenciesAxis = us-gaap_ObligationsMember | 0 us-gaap_GuaranteesFairValueDisclosure / bidu_CommitmentAndContingenciesAxis = us-gaap_ObligationsMember

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- Definition Fair value portion of guarantee, including, but not limited to, financial standby letter of credit, fair value guarantee, guarantee of collection of scheduled contractual cash flows from financial assets, and contracts that contingently require the guarantor to make payments or perform services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12201-110248 + Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant