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Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Statement of Comprehensive Income [Abstract]    
Net income $ 79 $ 56
Other comprehensive income, before tax:    
Foreign currency translation adjustment 8 29
Net change in derivative hedge agreements:    
Unrealized gains 0 2
Amount of loss reclassified into net income (1) 1
Net change in postretirement benefit plans:    
Amortization of prior service cost 1 0
Amortization of net actuarial loss into net income 3 3
Settlement/Curtailment 1 0
Other comprehensive (loss) income, before tax 10 35
Income tax benefit related to items of other comprehensive income (10) (7)
Other comprehensive income, net of tax 20 42
Comprehensive income $ 99 $ 98