Segment Information Level 4 (Details) - Depreciation by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Depreciation by Segment [Line Items]
Depreciation and amortization	$ 115	$ 131	$ 137
EPCD [Member]
Depreciation by Segment [Line Items]
Depreciation and amortization	71	87	96
FPD [Member]
Depreciation by Segment [Line Items]
Depreciation and amortization	40	40	35
Corporate and Other [Member]
Depreciation by Segment [Line Items]
Depreciation and amortization	$ 4	$ 4	$ 6