CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Net sales (Note 3)	$ 1,997	$ 2,973	$ 3,878	$ 6,085
Costs of sales	1,528	1,789	3,040	3,436
Gross margin	469	1,184	838	2,649
Selling expenses	22	23	44	46
General and administrative expenses	108	102	209	194
Other operating costs, net (Note 13)	20	12	30	18
Operating income	319	1,047	555	2,391
Non-operating pension and other post-employment benefit costs (Note 6)	(12)	(11)	(21)	(26)
Interest income and other	18	1	30	0
Interest expense, net of capitalized interest	(70)	(65)	(136)	(137)
Loss on debt extinguishment (Note 8)	0	0	0	(276)
Earnings before income taxes	255	972	428	1,952
Income taxes (Note 14)	(25)	(184)	(47)	(393)
Net earnings	$ 230	$ 788	$ 381	$ 1,559
Earnings per share, basic (Note 4)	$ 0.31	$ 1.06	$ 0.52	$ 2.09
Earnings per share, diluted (Note 4)	$ 0.31	$ 1.06	$ 0.52	$ 2.09
Weighted average shares outstanding (in thousands) (Note 4):
Basic	732,021	744,542	732,599	746,017
Diluted	732,362	745,582	732,961	747,194