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	17		17
Pension and OPEB liability adjustment	(7)				(7)
Foreign currency translation adjustment	(5)				(5)
Interest rate swaps	2				2
Issuance of common stock	20		20
Repurchase of common stock	(157)			(157)
Dividends on common stock	(63)			(63)
Net Income (Loss)	503			503
Ending Balance at Sep. 30, 2023	1,184	1	1,885	(670)	(32)
Beginning Balance at Jun. 30, 2023	1,056	1	1,868	(788)	(25)
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)
Issuance of common stock	11		11
Repurchase of common stock	(20)			(20)
Dividends on common stock	(20)			(20)
Net Income (Loss)	158			158
Ending Balance at Sep. 30, 2023	1,184	1	1,885	(670)	(32)
Beginning Balance at Dec. 31, 2023	1,233	1	1,891	(628)	(31)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	20		20
Pension and OPEB liability adjustment	(2)				(2)
Foreign currency translation adjustment	1				1
Interest rate swaps	(6)				(6)
Issuance of common stock	19		19
Repurchase of common stock	(134)			(134)
Dividends on common stock	(66)			(66)
Net Income (Loss)	556			556
Ending Balance at Sep. 30, 2024	1,621	1	1,930	(272)	(38)
Beginning Balance at Jun. 30, 2024	1,484	1	1,919	(399)	(37)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	6		6
Pension and OPEB liability adjustment	(3)				(3)
Foreign currency translation adjustment	8				8
Interest rate swaps	(6)				(6)
Issuance of common stock	5		5
Repurchase of common stock	(51)			(51)
Dividends on common stock	(22)			(22)
Net Income (Loss)	200			200
Ending Balance at Sep. 30, 2024	$ 1,621	$ 1	$ 1,930	$ (272)	$ (38)