CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Net sales (Note 3)	$ 3,144	$ 1,631	$ 5,650	$ 3,359
Costs of sales	1,583	1,283	3,013	2,665
Gross margin	1,561	348	2,637	694
Selling expenses	24	18	44	40
General and administrative expenses	95	84	185	158
Other operating costs, net (Note 15)	13	3	23	13
Operating income	1,429	243	2,385	483
Non-operating pension and other post-employment benefit costs (Note 7)	(1)	(10)	(9)	(19)
Interest income and other	2	2	3	3
Interest expense, net of capitalized interest	(78)	(103)	(157)	(188)
Earnings before income taxes	1,352	132	2,222	279
Income taxes (Note 16)	(324)	(60)	(513)	(57)
Net earnings	$ 1,028	$ 72	$ 1,709	$ 222
Earnings per share, basic and diluted (Note 4)	$ 1.37	$ 0.10	$ 2.28	$ 0.30
Weighted average shares outstanding (in thousands) (Note 4):
Basic	750,127	746,896	749,429	746,715
Diluted	751,508	746,984	750,773	747,070