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Fixed Assets - Additional Information (Detail)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
USD ($)
Dec. 31, 2013
CNY
Dec. 31, 2012
CNY
Dec. 31, 2011
CNY
Property Plant And Equipment [Abstract]        
Capital leases, asset gross $ 24.72 149.67 104.11  
Capital leases, accumulated depreciation 9.82 59.46 23.54  
Capital leases, future minimum lease payments   92.06    
Capital leases, future minimum lease payments due in 2014   49.16    
Capital leases, future minimum lease payments due in 2015   30.40    
Capital leases, future minimum lease payments due in 2016   12.46    
Capital leases, future minimum lease payments due in 2017   0.04    
Capital leases, future minimum lease payments due in 2018   0    
Fixed assets, depreciation expense 270.68 1,640.00 1,200.00 747.74
Impairment loss on fixed assets $ 0.34 2.06 0 0