Quarterly Financial Data (unaudited) - Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 819	$ 851	$ 880	$ 786	$ 831	$ 795	$ 811	$ 767	$ 3,336	$ 3,204	$ 3,017
Gross profit	131	152	184	139	167	162	168	159	606	656	700
Operating profit	37	69	75	46	83	91	95	84	227	353	396
Income (loss) from continuing operations	41	58	58	36	(70)	66	46	55	193	97	211
(Loss) income from discontinued operations, net of tax	1	1	0	1	1	0	(10)	0	3	(9)	20
Net income (loss)	$ 42	$ 59	$ 58	$ 37	$ (69)	$ 66	$ 36	$ 55	$ 196	$ 88	$ 510
Income per average common share, basic (in dollars per share)	$ 0.31	$ 0.42	$ 0.41	$ 0.26	$ (0.49)	$ 0.47	$ 0.25	$ 0.38	$ 1.40	$ 0.61	$ 3.49
Income per average common share, diluted (in dollars per share)	$ 0.30	$ 0.41	$ 0.41	$ 0.25	$ (0.49)	$ 0.46	$ 0.24	$ 0.37	$ 1.38	$ 0.60	$ 3.46
Income per average common share:
Loss on extinguishment of debt							$ 22		$ 0	$ 22	$ 37
Income tax expense related to 2017 Tax Act					$ 145				$ (11)	$ 145	$ 0