CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Statement [Abstract]
Net sales (Note 3)	$ 1,717	$ 1,681	$ 5,364	$ 5,416
Costs of sales	1,513	1,431	4,500	4,407
Gross margin	204	250	864	1,009
Selling expenses	23	22	69	66
General and administrative expenses	107	122	340	358
Other operating (income) costs, net (Note 13)	(49)	28	(25)	41
Operating income	123	78	480	544
Non-operating pension and other post-employment benefit costs (Note 6)	(19)	(10)	(57)	(31)
Interest income and other	6	14	17	43
Interest expense, net of capitalized interest	(71)	(69)	(203)	(203)
Earnings before income taxes	39	13	237	353
Income taxes (Note 14)	41	15	13	(38)
Net earnings	$ 80	$ 28	$ 250	$ 315
Earnings per share, basic (Note 4)	$ 0.11	$ 0.04	$ 0.35	$ 0.43
Earnings per share, diluted (Note 4)	$ 0.11	$ 0.04	$ 0.35	$ 0.43
Weighted average shares outstanding (in thousands) (Note 4):
Basic	721,598	727,621	723,791	728,892
Diluted	722,012	728,180	724,151	729,355