Property, Plant and Equipment - Asset Retirement Obligations (Details) - USD ($) $ in Millions	2 Months Ended	10 Months Ended	12 Months Ended
	Dec. 31, 2017	Oct. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	$ 45
Accretion expense	1
Liabilities settled	(1)
Revision in estimated cash flows	0
Effect of foreign currency rate change	0
Balance at end of period	45	$ 45
Predecessor
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	$ 94	89	$ 90	$ 85
Accretion expense		12	10	9
Liabilities settled		(7)	(9)	(8)
Revision in estimated cash flows		0	0	5
Effect of foreign currency rate change		0	(2)	(1)
Balance at end of period		$ 94	$ 89	$ 90