CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Statement [Abstract]
Net sales (Note 3)	$ 6,905	$ 7,124	$ 7,674
Costs of sales	5,880	5,811	5,992
Gross margin	1,025	1,313	1,682
Selling expenses	92	88	87
General and administrative expenses	453	480	431
Gain on sale of timberlands (Note 4)	(266)	0	(84)
Other operating costs, net (Note 17)	15	60	62
Operating income	731	685	1,186
Non-operating pension and other post-employment benefit costs (Note 8)	(220)	(42)	(45)
Interest income and other	22	53	76
Interest expense, net of capitalized interest	(273)	(269)	(280)
Earnings before income taxes	260	427	937
Income taxes (Note 18)	64	(31)	(98)
Net earnings	$ 324	$ 396	$ 839
Basic and diluted earnings per share (Note 5):
Basic	$ 0.45	$ 0.54	$ 1.15
Diluted	$ 0.45	$ 0.54	$ 1.15
Weighted average shares outstanding (in thousands) (Note 5):
Basic	723,162	728,398	731,654
Diluted	723,567	728,957	732,222