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Summary of Estimated Fair Values of Assets Acquired, Liabilities Assumed and Noncontrolling Interest (Detail)
In Thousands, unless otherwise specified
Dec. 31, 2013
USD ($)
Dec. 31, 2013
CNY
Dec. 31, 2012
USD ($)
Dec. 31, 2012
CNY
Dec. 31, 2011
CNY
Dec. 31, 2010
CNY
Dec. 31, 2012
Business Acquisitions 2012
CNY
Jul. 20, 2011
Qunar
CNY
Dec. 31, 2013
Series of Individually Immaterial Business Acquisitions
USD ($)
Dec. 31, 2013
Series of Individually Immaterial Business Acquisitions
CNY
Oct. 01, 2013
91 Wireless
USD ($)
Oct. 01, 2013
91 Wireless
CNY
Business Acquisition [Line Items]                        
Business combination, purchase consideration             1,190,717 1,939,569 $ 638,514 3,865,378 $ 1,849,486 11,196,235
Net assets acquired, excluding intangible assets and the related deferred tax liabilities             91,095 115,515 77,169 467,159 79,842 483,341
Intangible assets, net             664,380 711,570 131,558 796,415 189,355 1,146,300
Deferred tax liabilities, noncurrent             (72,222) (136,856) (18,540) (112,233) (45,979) (278,346)
Noncontrolling interests             (32,507) (102,922) (70,670) (427,813)    
Redeemable noncontrolling interests             (100,101) (942,004)        
Pre-existing equity method investments             (817,951)          
Goodwill $ 2,785,792 16,864,350 $ 640,528 3,877,564 2,419,542 63,686 1,458,023 2,294,266 $ 518,997 3,141,850 $ 1,626,268 9,844,940