CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Net sales	$ 10,201	$ 7,532	$ 6,554
Costs of sales	6,103	5,447	5,412
Gross margin	4,098	2,085	1,142
Selling expenses	95	83	84
General and administrative expenses	396	347	348
Charges for integration and restructuring, closures and asset impairments (Note 4)	0	1	80
Product remediation recoveries (Note 18)	(37)	(8)	(68)
Gain on sale of timberlands (Note 4)	(32)	(182)	(48)
Other operating costs, net (Note 19)	33	134	95
Operating income	3,643	1,710	651
Non-operating pension and other post-employment benefit costs (Note 9)	(19)	(290)	(516)
Interest income and other	5	5	30
Interest expense, net of capitalized interest	(313)	(443)	(378)
Earnings (loss) before income taxes	3,316	982	(213)
Income taxes (Note 20)	(709)	(185)	137
Net earnings (loss)	$ 2,607	$ 797	$ (76)
Earnings (loss) per share (Note 5):
Basic	$ 3.48	$ 1.07	$ (0.10)
Diluted	$ 3.47	$ 1.07	$ (0.10)
Weighted average shares outstanding (in thousands) (Note 5):
Basic	749,496	746,931	745,897
Diluted	750,983	747,899	745,897