Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 585.0	$ 582.0
Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	212.0	219.0
OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	220.0	208.0
EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	99.0	90.0
South America [Member]
Disaggregation of Revenue [Line Items]
Net sales	36.0	45.0
Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	18.0	21.0
Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	(1.0)
SmartSide Strand siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	194.0	193.0
SmartSide Strand siding [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	191.0	187.0
SmartSide Strand siding [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
SmartSide Strand siding [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
SmartSide Strand siding [Member] | South America [Member]
Disaggregation of Revenue [Line Items]
Net sales	3.0	6.0
SmartSide Strand siding [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
SmartSide Strand siding [Member] | Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
SmartSide Fiber siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	19.0	26.0
SmartSide Fiber siding [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	19.0	26.0
SmartSide Fiber siding [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
SmartSide Fiber siding [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
SmartSide Fiber siding [Member] | South America [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
SmartSide Fiber siding [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
SmartSide Fiber siding [Member] | Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
CanExel siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	11.0	17.0
CanExel siding [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
CanExel siding [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
CanExel siding [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
CanExel siding [Member] | South America [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
CanExel siding [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	11.0	17.0
CanExel siding [Member] | Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
OSB - value-add [Member]
Disaggregation of Revenue [Line Items]
Net sales	136.0	138.0
OSB - value-add [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
OSB - value-add [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	103.0	98.0
OSB - value-add [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	1.0	2.0
OSB - value-add [Member] | South America [Member]
Disaggregation of Revenue [Line Items]
Net sales	32.0	38.0
OSB - value-add [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
OSB - value-add [Member] | Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
LVL [Member]
Disaggregation of Revenue [Line Items]
Net sales	36.0	31.0
LVL [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
LVL [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
LVL [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	36.0	31.0
LVL [Member] | South America [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
LVL [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
LVL [Member] | Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
LSL [Member]
Disaggregation of Revenue [Line Items]
Net sales	12.0	12.0
LSL [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
LSL [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
LSL [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	12.0	13.0
LSL [Member] | South America [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
LSL [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
LSL [Member] | Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	(1.0)
I Joist [Member]
Disaggregation of Revenue [Line Items]
Net sales	37.0	26.0
I Joist [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
I Joist [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
I Joist [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	37.0	26.0
I Joist [Member] | South America [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
I Joist [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
I Joist [Member] | Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
OSB - commodity [Member]
Disaggregation of Revenue [Line Items]
Net sales	113.0	112.0
OSB - commodity [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	3.0
OSB - commodity [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	113.0	107.0
OSB - commodity [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	2.0
OSB - commodity [Member] | South America [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
OSB - commodity [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
OSB - commodity [Member] | Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
Plywood [Member]
Disaggregation of Revenue [Line Items]
Net sales	6.0	7.0
Plywood [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
Plywood [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
Plywood [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	6.0	7.0
Plywood [Member] | South America [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
Plywood [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
Plywood [Member] | Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	21.0
Other [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	2.0
Other [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	4.0
Other [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	7.0
Other [Member] | South America [Member]
Disaggregation of Revenue [Line Items]
Net sales	1.0
Other [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	7.0
Other [Member] | Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0
Commodity [Member]
Disaggregation of Revenue [Line Items]
Net sales	119.0	119.0
Commodity [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	3.0
Commodity [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	113.0	107.0
Commodity [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	6.0	9.0
Commodity [Member] | South America [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
Commodity [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
Commodity [Member] | Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
Value-add [Member]
Disaggregation of Revenue [Line Items]
Net sales	445.0	443.0
Value-add [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales	210.0	213.0
Value-add [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales	103.0	98.0
Value-add [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales	86.0	72.0
Value-add [Member] | South America [Member]
Disaggregation of Revenue [Line Items]
Net sales	35.0	44.0
Value-add [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	11.0	17.0
Value-add [Member] | Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 0.0	(1.0)
Other [Member]
Disaggregation of Revenue [Line Items]
Net sales		20.0
Other [Member] | Siding [Member]
Disaggregation of Revenue [Line Items]
Net sales		3.0
Other [Member] | OSB [Member]
Disaggregation of Revenue [Line Items]
Net sales		3.0
Other [Member] | EWP [Member]
Disaggregation of Revenue [Line Items]
Net sales		9.0
Other [Member] | South America [Member]
Disaggregation of Revenue [Line Items]
Net sales		1.0
Other [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales		4.0
Other [Member] | Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales		$ 0.0