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Income Taxes - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Income Tax Contingency [Line Items]        
Unrecognized tax benefit $ 128 $ 131 $ 118 $ 58
Unrecognized Tax Benefits Period Increase Decrease Recorded as Reduction in income tax expense 128      
Decrease in balance of unrecognized tax benefits associated with reduction in tax 2 9 1  
Unrecognized tax benefits that would reduce income tax 1      
Accrued income tax interest and penalties related to unrecognized tax benefit 7      
Operating loss carry forward potential benefit 25 14 10  
Foreign tax credit 259      
Excess foreign tax credit, valuation allowance 70      
Certain tax benefits total 138      
Valuation allowance 69      
Net deferred tax liabilities 2,330 2,066 2,336  
Undistributed earnings of foreign subsidiaries 4,620 3,789    
Foreign Country [Member]
        
Income Tax Contingency [Line Items]        
Decrease in balance of unrecognized tax benefits associated with reduction in tax 55      
Net operating loss carry forward 76      
Income tax interest and penalties related to unrecognized tax benefit 16      
Operating loss carry forward potential benefit 18      
Operating loss carry forward valuation allowance 16      
Domestic Country [Member]
        
Income Tax Contingency [Line Items]        
Net operating loss carry forward 20      
Income tax interest and penalties related to unrecognized tax benefit 7      
Operating loss carry forward potential benefit 7      
Operating loss carry forward valuation allowance 7      
Grant Predico Inc [Member]
        
Income Tax Contingency [Line Items]        
Net deferred tax liabilities $ 118