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Summary of Redeemable Noncontrolling Interest (Parenthetical) (Detail) (B.D. Mobile)	1 Months Ended
	Jul. 13, 2012
B.D. Mobile
Redeemable Noncontrolling Interest [Line Items]
Additional percentage of equity interest subscribed by redeemable noncontrolling shareholders	14.00%

X

- Definition

Additional percentage of equity interest subscribed by redeemable noncontrolling shareholders

+ References

No definition available.

+ Details

Name:	bidu_AdditionalMinorityInterestOwnershipPercentageSubscribedByNoncontrollingOwners
Namespace Prefix:	bidu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_RedeemableNoncontrollingInterestLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration