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Reconciliation of Net Income to Numerator for Computation of Basic and Diluted Net Income per Share (Detail)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2015
USD ($)
Dec. 31, 2015
CNY (¥)
Dec. 31, 2014
CNY (¥)
Dec. 31, 2013
CNY (¥)
Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]        
Net income attributable to Baidu, Inc. $ 5,196,853 ¥ 33,664,173 ¥ 13,196,932 ¥ 10,550,657
Accretion of the redeemable noncontrolling interests (50,817) (329,180) (52,683) (31,799)
Numerator for EPS computation $ 5,146,036 ¥ 33,334,993 ¥ 13,144,249 ¥ 10,518,858