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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, 2013
USD ($)
Dec. 31, 2013
CNY
Dec. 31, 2012
CNY
Dec. 31, 2011
CNY
Net Income Loss Available To Common Stockholders Diluted [Abstract]        
Net income attributable to Baidu, Inc. $ 1,737,609 10,518,966 10,456,028 6,638,637
Adjustments to the carrying amount of redeemable noncontrolling interests (5,253) (31,799) (22,143) 0
Numerator for EPS computation $ 1,732,356 10,487,167 10,433,885 6,638,637