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Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]    
Total, Beginning Balance $ 107 $ (23)
Total, Accumulated other comprehensive income (loss) before reclassifications (161) 121
Total, Amounts reclassified from accumulated other comprehensive income (loss) (4) 7
Total, Ending Balance (58) 105
Defined Benefit Plans, Net of Tax, Beginning Balance (67) (34)
Defined Benefit Plans, Net of Tax, Accumulated other comprehensive income (loss) before reclassifications      
Defined Benefit Plans, Net of Tax, Amounts reclassified from accumulated other comprehensive income (loss)      
Defined Benefit Plans, Net of Tax, Ending Balance (67) (34)
Derivative Financial Instruments, Net of Tax, Beginning Balance 42 (57)
Derivative Financial Instruments, Net of Tax, Accumulated other comprehensive income (loss) before reclassifications (44) 56
Derivative Financial Instruments, Net of Tax, Accumulated other comprehensive income (loss) before reclassifications (4) 7
Derivative Financial Instruments, Net of Tax, Ending Balance (6) 6
Currency Translation Adjustments, Beginning Balance 132 68
Currency Translation Adjustments, Accumulated other comprehensive income (loss) before reclassifications (117) 65
Currency Translation Adjustments, Amounts reclassified from accumulated other comprehensive income (loss)      
Currency Translation Adjustments, Ending Balance $ 15 $ 133