Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock Voting Common Stock	Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss, net of tax
Beginning Balance at Dec. 31, 2020	$ 756	$ 1	$ 1,818	$ (974)	$ (89)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	14		14
Pension and OPEB liability adjustment	2				2
Foreign currency translation adjustment	(8)				(8)
Interest rate swaps	22				22
Repurchase of common stock	(513)			(513)
Dividends on common stock	(81)			(81)
Net Income (Loss)	442			442
Ending Balance at Dec. 31, 2021	634	1	1,832	(1,126)	(73)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	18		18
Pension and OPEB liability adjustment	22				22
Foreign currency translation adjustment	(10)				(10)
Interest rate swaps	39				39
Issuance of common stock	(2)		(2)
Repurchase of common stock	(278)			(278)
Dividends on common stock	(80)			(80)
Net Income (Loss)	531			531
Ending Balance at Dec. 31, 2022	874	1	1,848	(953)	(22)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	22		22
Pension and OPEB liability adjustment	(7)				(7)
Foreign currency translation adjustment	2				2
Interest rate swaps	(4)				(4)
Issuance of common stock	21		21
Repurchase of common stock	(265)			(265)
Dividends on common stock	(83)			(83)
Net Income (Loss)	673			673
Ending Balance at Dec. 31, 2023	$ 1,233	$ 1	$ 1,891	$ (628)	$ (31)