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Summary of Redeemable Noncontrolling Interest (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified | 0 Months Ended
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Nov. 14, 2014
Temporary Equity Disclosure [Abstract] |
Acquired percentage of the outstanding equity interest | 13.42%bidu_MinorityInterestOwnershipPercentageByRedeemableNoncontrollingOwners
Total purchase consideration | $ 300 bidu_AggregateConsiderationFromRedeemableNoncontrollingShareholdersForPurchaseOfRedeemableNoncontrollingInterest

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- Definition Aggregate consideration from redeemable noncontrolling shareholders for purchase of redeemable noncontrolling interest. + References No definition available. + Details
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Namespace Prefix: | bidu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The equity interest of redeemable noncontrolling shareholders in the subsidiary. + References No definition available. + Details
Name: | bidu_MinorityInterestOwnershipPercentageByRedeemableNoncontrollingOwners
Namespace Prefix: | bidu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_TemporaryEquityDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration