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Reconciliation of Net Income to Numerator for Computation of Basic and Diluted Net Income per Share (Detail) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2014 CNY	Dec. 31, 2013 CNY	Dec. 31, 2012 CNY
Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]
Net income attributable to Baidu, Inc.	$ 2,125,372us-gaap_NetIncomeLoss	13,187,069us-gaap_NetIncomeLoss	10,518,966us-gaap_NetIncomeLoss	10,456,028us-gaap_NetIncomeLoss
Accretion of the redeemable noncontrolling interests	(8,493)us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment	(52,683)us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment	(31,799)us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment	(22,143)us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment
Numerator for EPS computation	$ 2,116,879us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	13,134,386us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	10,487,167us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	10,433,885us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic

X

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Amount of decrease to net income for accretion of temporary equity to its redemption value to derive net income apportioned to common stockholders.

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