Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock Voting Common Stock	Paid-in Capital	Accumulated (Deficit) Income	Accumulated Other Comprehensive (Loss) Income, net of tax
Beginning Balance at Dec. 31, 2022	$ 874	$ 1	$ 1,848	$ (953)	$ (22)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	5		5
Pension and OPEB liability adjustment	(2)				(2)
Foreign currency translation adjustment	2				2
Interest rate swaps	(3)				(3)
Issuance of common stock	4		4
Repurchase of common stock	(40)			(40)
Dividends on common stock	(22)			(22)
Net Income (Loss)	170			170
Ending Balance at Mar. 31, 2023	988	1	1,857	(845)	(25)
Beginning Balance at Dec. 31, 2023	1,233	1	1,891	(628)	(31)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	6		6
Pension and OPEB liability adjustment	(2)				(2)
Foreign currency translation adjustment	(5)				(5)
Interest rate swaps	1				1
Issuance of common stock	14		14
Repurchase of common stock	(52)			(52)
Dividends on common stock	(22)			(22)
Net Income (Loss)	169			169
Ending Balance at Mar. 31, 2024	$ 1,342	$ 1	$ 1,911	$ (533)	$ (37)