Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Net sales	$ 1,219.0	$ 795.0	$ 3,561.0	$ 1,928.0
Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	312.0	268.0	889.0	700.0
OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	600.0	368.0	1,917.0	792.0
EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	201.0	103.0	481.0	281.0
Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	30.0	11.0	73.0	36.0
South America
Disaggregation of Revenue [Line Items]
Net sales	76.0	45.0	203.0	119.0
Intersegment
Disaggregation of Revenue [Line Items]
Net sales	(1.0)	0.0	(2.0)	0.0
Value-add [Member]
Disaggregation of Revenue [Line Items]
Net sales	871.0	552.0	2,402.0	1,378.0
Value-add [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	310.0		879.0
Value-add [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	307.0	162.0	912.0	360.0
Value-add [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	180.0	86.0	411.0	244.0
Value-add [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Value-add [Member] | South America
Disaggregation of Revenue [Line Items]
Net sales	75.0	44.0	200.0	116.0
Value-add [Member] | Intersegment
Disaggregation of Revenue [Line Items]
Net sales	(1.0)	0.0	(2.0)	0.0
Value-add [Member] | SmartSide siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	319.0	264.0	908.0	670.0
Value-add [Member] | SmartSide siding [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	310.0	260.0	879.0	658.0
Value-add [Member] | SmartSide siding [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Value-add [Member] | SmartSide siding [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Value-add [Member] | SmartSide siding [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Value-add [Member] | SmartSide siding [Member] | South America
Disaggregation of Revenue [Line Items]
Net sales	9.0	4.0	29.0	12.0
Value-add [Member] | SmartSide siding [Member] | Intersegment
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Value-add [Member] | OSB -Structural Solutions [Member]
Disaggregation of Revenue [Line Items]
Net sales	372.0	202.0	1,082.0	466.0
Value-add [Member] | OSB -Structural Solutions [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales		0.0		0.0
Value-add [Member] | OSB -Structural Solutions [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	307.0	162.0	912.0	360.0
Value-add [Member] | OSB -Structural Solutions [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	2.0
Value-add [Member] | OSB -Structural Solutions [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Value-add [Member] | OSB -Structural Solutions [Member] | South America
Disaggregation of Revenue [Line Items]
Net sales	65.0	40.0	171.0	104.0
Value-add [Member] | OSB -Structural Solutions [Member] | Intersegment
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Value-add [Member] | I Joist [Member]
Disaggregation of Revenue [Line Items]
Net sales	109.0		232.0
Value-add [Member] | I Joist [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	109.0	37.0	232.0	106.0
Value-add [Member] | LVL [Member]
Disaggregation of Revenue [Line Items]
Net sales	51.0	35.0	140.0	101.0
Value-add [Member] | LVL [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Value-add [Member] | LVL [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Value-add [Member] | LVL [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	51.0	35.0	140.0	101.0
Value-add [Member] | LVL [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Value-add [Member] | LVL [Member] | South America
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Value-add [Member] | LVL [Member] | Intersegment
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Value-add [Member] | LSL [Member]
Disaggregation of Revenue [Line Items]
Net sales	20.0	14.0	39.0	35.0
Value-add [Member] | LSL [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Value-add [Member] | LSL [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Value-add [Member] | LSL [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	20.0	14.0	39.0	35.0
Value-add [Member] | LSL [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Value-add [Member] | LSL [Member] | South America
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Value-add [Member] | LSL [Member] | Intersegment
Disaggregation of Revenue [Line Items]
Net sales	(1.0)	0.0	(2.0)	0.0
Commodity
Disaggregation of Revenue [Line Items]
Net sales	299.0	205.0	1,038.0	435.0
Commodity | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Commodity | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	290.0	198.0	997.0	419.0
Commodity | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	9.0	7.0	41.0	16.0
Commodity | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Commodity | South America
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Commodity | Intersegment
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Commodity | OSB - commodity [Member]
Disaggregation of Revenue [Line Items]
Net sales	290.0	198.0	997.0	419.0
Commodity | OSB - commodity [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Commodity | OSB - commodity [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	290.0	198.0	997.0	419.0
Commodity | OSB - commodity [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Commodity | OSB - commodity [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Commodity | OSB - commodity [Member] | South America
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Commodity | OSB - commodity [Member] | Intersegment
Disaggregation of Revenue [Line Items]
Net sales		0.0		0.0
Commodity | Plywood [Member]
Disaggregation of Revenue [Line Items]
Net sales	9.0	7.0	41.0	16.0
Commodity | Plywood [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Commodity | Plywood [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Commodity | Plywood [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	9.0	7.0	41.0	16.0
Commodity | Plywood [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Commodity | Plywood [Member] | South America
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Commodity | Plywood [Member] | Intersegment
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Other Product Types | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	49.0	38.0	123.0	115.0
Other Product Types | Other [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	3.0	8.0	9.0	42.0
Other Product Types | Other [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	4.0	8.0	9.0	13.0
Other Product Types | Other [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	11.0	10.0	29.0	21.0
Other Product Types | Other [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	30.0	11.0	73.0	36.0
Other Product Types | Other [Member] | South America
Disaggregation of Revenue [Line Items]
Net sales	2.0	$ 1.0	3.0	$ 3.0
Other Product Types | Other [Member] | Intersegment
Disaggregation of Revenue [Line Items]
Net sales	$ 0.0		$ (2.0)