Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 340,000,000	$ 337,000,000	$ 228,000,000
Other comprehensive (loss) income, before tax:
Foreign currency translation adjustment	(180,000,000)	(206,000,000)	15,000,000
Foreign currency gain reclassified into net income	(8,000,000)	0	0
Net change in derivative hedge agreements:
Unrealized (losses) gains	(22,000,000)	(22,000,000)	1,000,000
Amount of loss reclassified into net income	20,000,000	6,000,000	0
Net change in postretirement benefit plans:
Net gain (loss)	23,000,000	(110,000,000)	34,000,000
Prior service credit	1,000,000	17,000,000	4,000,000
Amortization of prior service (credit) cost	(3,000,000)	(1,000,000)	1,000,000
Amortization of net actuarial loss into net income	18,000,000	11,000,000	17,000,000
Settlement	0	1,000,000	0
Foreign currency translation adjustment	21,000,000	20,000,000	2,000,000
Other comprehensive (loss) income, before tax	(130,000,000)	(284,000,000)	74,000,000
Income tax expense (benefits) related to other comprehensive (loss) income	9,000,000	(18,000,000)	22,000,000
Other comprehensive (loss) income, net of tax	(139,000,000)	(266,000,000)	52,000,000
Comprehensive income	$ 201,000,000	$ 71,000,000	$ 280,000,000