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Income Taxes - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Income Taxes [Line Items]      
Accrued liabilities, interest on unrecognized tax benefits $ 7    
Total amount of unrecognized tax benefits that, if recognized, would affect effective tax rate 68   69
Unrecognized tax benefits 118   127
Federal Income Tax Refund 176    
Income tax receivable (Note 8) 184   185
(Loss) income before income taxes 53 (66)  
Provision for tax 1 7  
Domestic Country
     
Income Taxes [Line Items]      
Net deferred tax asset 56   88
Foreign Country
     
Income Taxes [Line Items]      
Deferred tax asset, valuation allowance 1,002   1,028
Net deferred tax asset $ 60   $ 59