Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Millions	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2018	105,000,000			(19,000,000)
Balance at Dec. 31, 2018	$ 1	$ 1,721	$ (498)	$ (300)	$ (232)	$ 692
Net income (loss)	0	0	18	0	0	18
Foreign currency translation	0	0	0	0	3	3
Hedge accounting adjustments	0	0	0	0	(2)	(2)
Shares withheld for taxes	0	(6)	0	0	0	(6)
Equity-based compensation expense	0	4	0	0	0	4
Dividends declared on preferred stock	$ 0	0	(6)	$ 0	0	(6)
Balance (in shares) at Mar. 31, 2019	105,000,000			(21,000,000)
Purchase of common stock (in shares)	0			(2,000,000)
Purchase of common stock	$ 0	0	0	$ (25)	0	(25)
Balance at Mar. 31, 2019	$ 1	1,719	(486)	$ (325)	(231)	678
Balance (in shares) at Dec. 31, 2018	105,000,000			(19,000,000)
Balance at Dec. 31, 2018	$ 1	1,721	(498)	$ (300)	(232)	692
Net income (loss)						63
Foreign currency translation						(3)
Hedge accounting adjustments						$ (6)
Balance (in shares) at Sep. 30, 2019	106,000,000			(23,000,000)
Purchase of common stock (in shares)						(4,088,490)
Purchase of common stock						$ (63)
Balance at Sep. 30, 2019	$ 1	1,727	(453)	$ (363)	(241)	671
Balance (in shares) at Mar. 31, 2019	105,000,000			(21,000,000)
Balance at Mar. 31, 2019	$ 1	1,719	(486)	$ (325)	(231)	678
Net income (loss)	0	0	24	0	0	24
Foreign currency translation	0	0	0	0	2	2
Hedge accounting adjustments	0	0	0	0	(4)	(4)
Equity-based compensation expense	0	3	0	0	0	3
Dividends declared on preferred stock	$ 0	0	(6)	$ 0	0	(6)
Balance (in shares) at Jun. 30, 2019	106,000,000			(22,000,000)
Purchase of common stock (in shares)	0			(1,000,000)
Purchase of common stock	$ 0	0	0	$ (25)	0	(25)
Balance at Jun. 30, 2019	1	1,722	(468)	(350)	(233)	672
Net income (loss)	0	0	21	0	0	21
Foreign currency translation	0	0	0	0	(8)	(8)
Hedge accounting adjustments						0
Equity-based compensation expense	0	5	0	0	0	5
Dividends declared on preferred stock	$ 0	0	(6)	$ 0	0	$ (6)
Balance (in shares) at Sep. 30, 2019	106,000,000			(23,000,000)
Purchase of common stock (in shares)	0			(1,000,000)		(957,869)
Purchase of common stock	$ 0	0	0	$ (13)	0	$ (13)
Balance at Sep. 30, 2019	$ 1	1,727	(453)	$ (363)	(241)	671
Balance (in shares) at Dec. 31, 2019	106,000,000			(24,000,000)
Balance at Dec. 31, 2019	$ 1	1,731	(483)	$ (375)	(232)	642
Net income (loss)	0	0	9	0	0	9
Foreign currency translation	0	0	0	0	(21)	(21)
Hedge accounting adjustments	0	0	0	0	(6)	(6)
Shares withheld for taxes	0	(3)	0	0	0	(3)
Equity-based compensation expense	0	2	0	0	0	2
Dividends declared on preferred stock	$ 0	0	(6)	$ 0	0	(6)
Balance (in shares) at Mar. 31, 2020	106,000,000			(24,000,000)
Balance at Mar. 31, 2020	$ 1	1,730	(480)	$ (375)	(259)	617
Balance (in shares) at Dec. 31, 2019	106,000,000			(24,000,000)
Balance at Dec. 31, 2019	$ 1	1,731	(483)	$ (375)	(232)	642
Net income (loss)						(269)
Foreign currency translation						(8)
Hedge accounting adjustments						$ (5)
Balance (in shares) at Sep. 30, 2020	106,000,000			(24,000,000)
Purchase of common stock (in shares)						0
Purchase of common stock						$ 0
Balance at Sep. 30, 2020	$ 1	1,736	(770)	$ (375)	(245)	347
Balance (in shares) at Mar. 31, 2020	106,000,000			(24,000,000)
Balance at Mar. 31, 2020	$ 1	1,730	(480)	$ (375)	(259)	617
Net income (loss)	0	0	(281)	0	0	(281)
Foreign currency translation	0	0	0	0	8	8
Equity-based compensation expense	0	3	0	0	0	3
Dividends declared on preferred stock	$ 0	0	(6)	$ 0	0	(6)
Balance (in shares) at Jun. 30, 2020	106,000,000			(24,000,000)
Balance at Jun. 30, 2020	$ 1	1,733	(767)	$ (375)	(251)	341
Net income (loss)	0	0	3	0	0	3
Foreign currency translation	0	0	0	0	5	5
Hedge accounting adjustments	0	0	0	0	1	1
Equity-based compensation expense	0	3	0	0	0	3
Dividends declared on preferred stock	$ 0	0	(6)	$ 0	0	$ (6)
Balance (in shares) at Sep. 30, 2020	106,000,000			(24,000,000)
Purchase of common stock (in shares)						0
Purchase of common stock						$ 0
Balance at Sep. 30, 2020	$ 1	$ 1,736	$ (770)	$ (375)	$ (245)	$ 347