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Pro Forma Consolidated Statements of Comprehensive Income (Detail) (91 Wireless)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
USD ($)
Dec. 31, 2013
CNY
Dec. 31, 2012
CNY
Business Acquisition Pro Forma [Abstract]      
Revenue $ 5,381,639 32,578,828 22,611,444
Net income attributable to Baidu, Inc. $ 1,744,032 10,557,846 10,285,828