Acquisitions and Dispositions - Summarized Income Statement (Details) - USD ($) $ in Millions	3 Months Ended								10 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	Oct. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of discontinued operations					$ 279	$ 0	$ 0	$ 0		$ 0	$ 279	$ 0
(Loss) income from discontinued operations, net of tax	$ 1	$ 0	$ (10)	$ 0	$ 0	$ 6	$ 7	$ 7		(9)	20	15
L&W Supply | Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales											1,252	1,428
Cost of products sold											1,196	1,387
Gross profit											56	41
Selling and administrative expenses											22	15
Operating profit											34	26
Income tax expense											12	11
Net income from discontinued operations											22	15
Gain on sale of discontinued operations											279	$ 0
Transaction costs related to sale									$ 8
(Loss) income from discontinued operations, net of tax										(8)
European Operations | Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) income from discontinued operations, net of tax										$ (1)	$ (2)