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Employee Benefit Plans Pre-tax Net Changes in Projected Benefit Obligations Recognized in Other Comprehensive Income (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Pension      
Total recognized in other comprehensive (loss) income $ (9) $ (29) $ 0
Postemployment      
Actuarial (gain) loss arising during the year 18 18  
Amortization of (loss) gain included in net periodic benefit cost 0 1 1
Prior service cost arising during the year 0 0  
Total recognized in other comprehensive (loss) income 18 19  
Foreign Pension Plan      
Pension      
Actuarial (gain) loss arising during the year (9) 14  
Amortization of (loss) gain included in net periodic benefit cost (2) (2) (2)
Prior service cost arising during the year 0 1  
Recognition of loss due to settlement (1) (1) $ (1)
Foreign currency exchange 0 (3)  
Total recognized in other comprehensive (loss) income $ (12) $ 9