CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Net sales (Note 3)	$ 2,022	$ 2,276	$ 5,900	$ 8,361
Costs of sales	1,520	1,694	4,560	5,130
Gross margin	502	582	1,340	3,231
Selling expenses	22	24	66	70
General and administrative expenses	107	100	316	294
Other operating costs, net (Note 13)	20	1	50	19
Operating income	353	457	908	2,848
Non-operating pension and other post-employment benefit costs (Note 6)	(12)	(12)	(33)	(38)
Interest income and other	24	9	54	9
Interest expense, net of capitalized interest	(72)	(67)	(208)	(204)
Loss on debt extinguishment (Note 8)	0	0	0	(276)
Earnings before income taxes	293	387	721	2,339
Income taxes (Note 14)	(54)	(77)	(101)	(470)
Net earnings	$ 239	$ 310	$ 620	$ 1,869
Earnings per share, basic (Note 4)	$ 0.33	$ 0.42	$ 0.85	$ 2.51
Earnings per share, diluted (Note 4)	$ 0.33	$ 0.42	$ 0.85	$ 2.51
Weighted average shares outstanding (in thousands) (Note 4):
Basic	731,046	740,058	732,069	743,990
Diluted	731,742	740,975	732,542	745,081