Reportable Segments (Schedule of Reconciliation of EBITDA for Reportable Segments) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting [Abstract]
Total reportable segments EBITDA excluding non-cash items		$ 133	$ 123	$ 467	$ 425
Interest income		2	0	6	0
Interest expense	[1]	(36)	(28)	(124)	(71)
Goodwill impairment		0	(3)	0	(3)
Depreciation		(49)	(49)	(145)	(143)
Amortization of intangibles		(14)	(20)	(44)	(53)
Fees to Manager-related party		(8)	(12)	(23)	(36)
Other expense, net		(6)	(7)	(19)	(18)
Net income from continuing operations before income taxes		$ 22	$ 4	$ 118	$ 101

[1] Interest expense includes losses on derivative instruments of $2 million and $14 million for the quarter and nine months ended September 30, 2019, respectively. Interest expense includes gains on derivative instruments of $3 million and $17 million for the quarter and nine months ended September 30, 2018, respectively.