Segment Information Level 4 (Details) - EBITDA by Segment - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Segment EBITDA [Line Items]	$ 365	$ 433	$ 466
EPCD [Member]
Segment Reporting Information [Line Items]
Segment EBITDA [Line Items]	174	258	307
FPD [Member]
Segment Reporting Information [Line Items]
Segment EBITDA [Line Items]	257	240	233
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Segment EBITDA [Line Items]	$ (66)	$ (65)	$ (74)