Quarterly Financial Data - Summarized Quarterly Result (Detail) - 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]
Revenue	$ 669	$ 697	$ 651	$ 631	$ 538	$ 520	$ 501	$ 548	$ 2,648	$ 2,107	$ 3,010
Operating expenses:
Cost of products	541	562	527	517	450	433	418	461	2,147	1,762	2,508
Warehousing, selling and administrative	128	141	138	135	135	140	140	152	542	567	619
Operating loss		(6)	(14)	(21)	(47)	(53)	(57)	(65)	(41)	(222)	(510)
Other expense	(3)	(3)	(3)	(2)	(1)	(3)	(2)	(2)	(11)	(8)	(8)
Loss before income taxes	(3)	(9)	(17)	(23)	(48)	(56)	(59)	(67)	(52)	(230)	(518)
Income tax provision (benefit)					23		(15)	(4)		4	(16)
Net loss	$ (3)	$ (9)	$ (17)	$ (23)	$ (71)	$ (56)	$ (44)	$ (63)	$ (52)	$ (234)	$ (502)
Loss per share:
Basic loss per common share	$ (0.03)	$ (0.08)	$ (0.16)	$ (0.21)	$ (0.66)	$ (0.53)	$ (0.40)	$ (0.59)	$ (0.48)	$ (2.18)	$ (4.68)
Diluted loss per common share	$ (0.03)	$ (0.08)	$ (0.16)	$ (0.21)	$ (0.66)	$ (0.53)	$ (0.40)	$ (0.59)	$ (0.48)	$ (2.18)	$ (4.68)
Weighted-average common shares outstanding, basic	108,000,000	108,000,000	108,000,000	108,000,000	107,000,000	107,000,000	107,000,000	107,000,000	107,745,229	107,416,181	107,173,972
Weighted-average common shares outstanding, diluted	108,000,000	108,000,000	108,000,000	108,000,000	107,000,000	107,000,000	107,000,000	107,000,000	107,745,229	107,416,181	107,173,972