Quarterly Financial Data (unaudited) - Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ 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
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 831	$ 795	$ 811	$ 767	$ 734	$ 767	$ 769	$ 747	$ 3,204	$ 3,017	$ 2,913
Gross profit	170	163	168	164	150	181	193	181	665	705	650
Operating profit	87	93	96	91	59	97	122	116	367	394	355
Income (loss) from continuing operations	(70)	66	46	55	28	56	67	60	97	211	976
(Loss) income from discontinued operations, net of tax	1	0	(10)	0	0	6	7	7	(9)	20	15
Gain on sale of discontinued operations, net of tax					279	0	0	0	0	279	0
Net income	$ (69)	$ 66	$ 36	$ 55	$ 307	$ 62	$ 74	$ 67	$ 88	$ 510	$ 991
Income per average common share:
Basic (in dollars per share)	$ (0.49)	$ 0.47	$ 0.25	$ 0.38	$ 2.10	$ 0.43	$ 0.50	$ 0.46	$ 0.67	$ 1.45	$ 6.70
Diluted (in dollars per share)	$ (0.49)	$ 0.46	$ 0.24	$ 0.37	$ 2.07	$ 0.42	$ 0.50	$ 0.46	$ 0.66	$ 1.44	$ 6.62
Loss on extinguishment of debt			$ 22		$ 32				$ 22	$ 37	$ 19
Law changes									$ 145	$ 0	$ 0