Accumulated Other Comprehensive (Loss) Income - Changes in AOCI (Details) - USD ($)	2 Months Ended	10 Months Ended	12 Months Ended
	Dec. 31, 2017	Oct. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Increase (Decrease) in Accumulated Other Comprehensive Income
Beginning balance			$ (171,000,000)	$ 18,000,000
Other comprehensive loss before reclassifications			(5,000,000)	(200,000,000)
Amounts reclassified from accumulated other comprehensive income			(3,000,000)	5,000,000
Cumulative effect of adoption of ASU 2018-02, Income Statement-Reporting Comprehensive Income: Reclassification of Certain Tax Effects from Accumulated other Comprehensive Income				6,000,000
Net other comprehensive (loss) income	$ 18,000,000	$ 80,000,000	(8,000,000)	(195,000,000)
Ending balance	18,000,000		(179,000,000)	(171,000,000)
Pension Plans
Increase (Decrease) in Accumulated Other Comprehensive Income
Beginning balance			5,000,000	0
Other comprehensive loss before reclassifications			0	0
Amounts reclassified from accumulated other comprehensive income			(3,000,000)	5,000,000
Cumulative effect of adoption of ASU 2018-02, Income Statement-Reporting Comprehensive Income: Reclassification of Certain Tax Effects from Accumulated other Comprehensive Income				0
Net other comprehensive (loss) income			(3,000,000)	5,000,000
Ending balance	0		2,000,000	5,000,000
Foreign Currency Translation Adjustments and Other
Increase (Decrease) in Accumulated Other Comprehensive Income
Beginning balance			(176,000,000)	18,000,000
Other comprehensive loss before reclassifications			(5,000,000)	(200,000,000)
Amounts reclassified from accumulated other comprehensive income			0	0
Cumulative effect of adoption of ASU 2018-02, Income Statement-Reporting Comprehensive Income: Reclassification of Certain Tax Effects from Accumulated other Comprehensive Income				6,000,000
Net other comprehensive (loss) income			(5,000,000)	(200,000,000)
Ending balance	$ 18,000,000		$ (181,000,000)	$ (176,000,000)