Segment Information Level 4 (Details) - Capital Expenditures by Segment (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Capital Expenditures by Segment [Line Items]
Capital Expenditures		$ 118	$ 141	$ 179
EPCD [Member]
Capital Expenditures by Segment [Line Items]
Capital Expenditures	[1]	73	72	71
FPD [Member]
Capital Expenditures by Segment [Line Items]
Capital Expenditures	[1]	40	67	106
Corporate and Other [Member]
Capital Expenditures by Segment [Line Items]
Capital Expenditures	[1]	$ 5	$ 2	$ 2

[1] Includes capitalized interest costs that are incurred during the construction of property and equipment.