Segment Information Level 4 (Details) - Capital Expenditures by Segment (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Capital Expenditures by Segment [Line Items]
Capital Expenditures		$ 90	$ 118	$ 141
EPCD [Member]
Capital Expenditures by Segment [Line Items]
Capital Expenditures	[1]	56	73	72
FPD [Member]
Capital Expenditures by Segment [Line Items]
Capital Expenditures	[1]	31	40	67
Corporate and Other [Member]
Capital Expenditures by Segment [Line Items]
Capital Expenditures	[1]	$ 3	$ 5	$ 2

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