Revenue Disaggregation of revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Net sales	$ (2,941)	$ (2,581)	$ (3,854)
Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	(2,932)	(2,559)	(3,772)
Intersegment sales
Disaggregation of Revenue [Line Items]
Net sales	0	0	(2)
OSB - value-add [Member]
Disaggregation of Revenue [Line Items]
Net sales	(813)	(742)	(1,323)
OSB - value-add [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	0	0	(2)
OSB - commodity [Member]
Disaggregation of Revenue [Line Items]
Net sales	(514)	(446)	(937)
OSB - commodity [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	0	0
Value-add [Member]
Disaggregation of Revenue [Line Items]
Net sales	(2,383)	(2,086)	(2,809)
Value-add [Member] | Intersegment sales
Disaggregation of Revenue [Line Items]
Net sales	0	0	(2)
Other products [Member]
Disaggregation of Revenue [Line Items]
Net sales	(44)	(49)	(107)
Other products [Member] | Intersegment sales
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Commodity Products [Member]
Disaggregation of Revenue [Line Items]
Net sales
Commodity Products [Member] | Intersegment sales
Disaggregation of Revenue [Line Items]
Net sales			(1)
Siding Solutions
Disaggregation of Revenue [Line Items]
Net sales	(1,570)	(1,343)	(1,486)
Siding Solutions | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Siding | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	(1,558)	(1,328)	(1,469)
Siding | OSB - value-add [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Siding | OSB - commodity [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	0	0
Siding | Value-add [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	(1,549)	(1,319)	(1,463)
Siding | Other products [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	(9)	(9)	(6)
Siding | Commodity Products [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales			0
Siding | Siding Solutions | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	(1,549)	(1,319)	(1,463)
OSB | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	(1,184)	(1,026)	(2,062)
OSB | OSB - value-add [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	(650)	(565)	(1,110)
OSB | OSB - commodity [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	(514)	(446)
OSB | Value-add [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	(650)	(565)	(1,110)
OSB | Other products [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	(20)	(15)	(14)
OSB | Commodity Products [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales			(938)
OSB | Siding Solutions | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
South America | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	(190)	(205)	(241)
South America | OSB - value-add [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	(163)	(177)	(215)
South America | OSB - commodity [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	0	0
South America | Value-add [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	(184)	(201)	(238)
South America | Other products [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	(6)	(4)	(3)
South America | Commodity Products [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales			0
South America | Siding Solutions | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	(21)	(24)	(23)
Other | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	(9)	(22)	(84)
Other | OSB - value-add [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Other | OSB - commodity [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other | Value-add [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Other | Other products [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	(9)	(22)	(84)
Other | Commodity Products [Member] | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales			0
Other | Siding Solutions | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0	$ 0