Segments - Geographic Information (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Geographic Areas, Revenues from External Customers [Abstract]
Net sales	$ 831	$ 795	$ 811	$ 767	$ 734	$ 767	$ 769	$ 747	$ 3,204	$ 3,017	$ 2,913
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets	1,762				1,707				1,762	1,707	1,771
Reportable geographical components | United States
Geographic Areas, Revenues from External Customers [Abstract]
Net sales									2,787	2,625	2,524
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets	1,604				1,563				1,604	1,563	1,605
Reportable geographical components | Canada
Geographic Areas, Revenues from External Customers [Abstract]
Net sales									406	389	379
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets	90				80				90	80	90
Reportable geographical components | Other Foreign
Geographic Areas, Revenues from External Customers [Abstract]
Net sales									204	189	196
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets	$ 68				$ 64				68	64	76
Geographic transfers
Geographic Areas, Revenues from External Customers [Abstract]
Net sales									$ (193)	$ (186)	$ (186)