CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net sales (Note 3)	$ 2,345	$ 2,110	$ 7,995	$ 5,469
Costs of sales	1,589	1,390	4,602	4,055
Gross margin	756	720	3,393	1,414
Selling expenses	24	22	68	62
General and administrative expenses	98	96	283	254
Other operating costs (income), net (Note 15)	(15)	92	8	105
Operating income	649	510	3,034	993
Non-operating pension and other post-employment benefit costs (Note 7)	(5)	(9)	(14)	(28)
Interest income and other	1	2	4	5
Interest expense, net of capitalized interest	(79)	(111)	(236)	(299)
Earnings before income taxes	566	392	2,788	671
Income taxes (Note 16)	(84)	(109)	(597)	(166)
Net earnings	$ 482	$ 283	$ 2,191	$ 505
Earnings per share, basic and diluted (Note 4)	$ 0.64	$ 0.38	$ 2.92	$ 0.68
Weighted average shares outstanding (in thousands) (Note 4):
Basic	750,105	746,996	749,657	746,809
Diluted	751,443	748,450	750,999	747,530