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Tax Effects of Temporary Differences that Gave Rise to Deferred Tax Balances (Detail)
¥ in Millions, $ in Millions
Dec. 31, 2017
USD ($)
Dec. 31, 2017
CNY (¥)
Dec. 31, 2016
CNY (¥)
Dec. 31, 2013
CNY (¥)
Deferred tax assets:        
Provision for doubtful receivables $ 44 ¥ 287 ¥ 138  
Accrued expenses, payroll and others 438 2,849 2,715  
Fixed assets depreciation 8 53 26  
Net operating loss carry-forward 163 1,061 1,727  
Less: valuation allowance (418) (2,718) (3,506)  
Deferred tax assets, net 235 1,532 1,100  
Deferred tax liabilities:        
Long-lived assets arising from acquisitions 20 133 248  
Withholding tax on PRC subsidiaries' undistributed earnings 91 586 633 ¥ 581
Withholding tax on capital gains derived from PRC 408 2,656 2,708  
Deferred tax liabilities $ 519 ¥ 3,375 ¥ 3,589