Consolidated Statement of Equity (Deficit) (Unaudited) - USD ($) $ in Millions	Total	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Redeemable Convertible Preferred Stock [Member]
Balance at Dec. 31, 2023	$ 931	$ 1,156	$ (495)	$ 281	$ (11)	$ 210
Net loss earnings	32		32
Currency translation adjustments	(6)			(6)
Pension and other postretirement liability adjustments	(6)			(6)
Preferred stock cash dividends	(1)	(1)
Preferred stock in-kind dividends	(1)	(1)				1
Preferred stock deemed dividends	(1)	(1)				1
Stock-based compensation	3	3
Balance at Mar. 31, 2024	951	1,156	(463)	269	(11)	212
Balance at Dec. 31, 2023	931	1,156	(495)	281	(11)	210
Net loss earnings	58
Balance at Jun. 30, 2024	961	1,154	(437)	256	(12)	214
Balance at Mar. 31, 2024	951	1,156	(463)	269	(11)	212
Net loss earnings	26		26
Currency translation adjustments	(6)			(6)
Pension and other postretirement liability adjustments	7			(7)
Preferred stock cash dividends	1	(1)
Preferred stock in-kind dividends	2	(2)				(2)
Purchases of treasury stock (1)	(1)				1
Stock-based compensation	1	1
Balance at Jun. 30, 2024	961	1,154	(437)	256	(12)	214
Balance at Dec. 31, 2024	641	1,150	(393)	(104)	(12)	218
Net loss earnings	(7)		(7)
Currency translation adjustments	6			6
Pension and other postretirement liability adjustments	(75)			(75)
Preferred stock cash dividends	(1)	(1)
Preferred stock in-kind dividends	(2)	(2)				2
Purchases of treasury stock (1)	(1)				(1)
Stock-based compensation	2	2
Balance at Mar. 31, 2025	563	1,149	(400)	(173)	(13)	220
Balance at Dec. 31, 2024	641	1,150	(393)	(104)	(12)	218
Net loss earnings	(33)
Balance at Jun. 30, 2025	528	1,147	(426)	(179)	(14)	222
Balance at Mar. 31, 2025	563	1,149	(400)	(173)	(13)	220
Net loss earnings	(26)		(26)
Currency translation adjustments	7			7
Pension and other postretirement liability adjustments	(13)			(13)
Preferred stock cash dividends	(1)	(1)
Preferred stock in-kind dividends	(1)	(1)				1
Purchases of treasury stock (1)	(1)				(1)
Preferred stock deemed dividends	(1)	(1)				1
Stock-based compensation	1	1
Balance at Jun. 30, 2025	$ 528	$ 1,147	$ (426)	$ (179)	$ (14)	$ 222