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Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Disaggregation of Revenue [Line Items]        
Revenues $ 603.0 $ 737.0 $ 1,773.0 $ 2,239.0
Siding [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 259.0 241.0 733.0 729.0
OSB [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 197.0 349.0 605.0 1,050.0
EWP [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 105.0 110.0 303.0 329.0
South America [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 36.0 35.0 121.0 122.0
Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 6.0 3.0 16.0 9.0
Intersegment [Member]        
Disaggregation of Revenue [Line Items]        
Revenues (1.0) 0.0 (4.0) 0.0
SmartSide Strand siding [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 217.0 191.0 614.0 563.0
SmartSide Strand siding [Member] | Siding [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 213.0 188.0 600.0 546.0
SmartSide Strand siding [Member] | OSB [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
SmartSide Strand siding [Member] | EWP [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
SmartSide Strand siding [Member] | South America [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 4.0 3.0 14.0 17.0
SmartSide Strand siding [Member] | Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
SmartSide Strand siding [Member] | Intersegment [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
SmartSide Fiber siding [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 28.0 30.0 79.0 84.0
SmartSide Fiber siding [Member] | Siding [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 28.0 30.0 79.0 84.0
SmartSide Fiber siding [Member] | OSB [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
SmartSide Fiber siding [Member] | EWP [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
SmartSide Fiber siding [Member] | South America [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
SmartSide Fiber siding [Member] | Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
SmartSide Fiber siding [Member] | Intersegment [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
CanExel siding [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 15.0 7.0 38.0 33.0
CanExel siding [Member] | Siding [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 15.0 7.0 38.0 33.0
CanExel siding [Member] | OSB [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
CanExel siding [Member] | EWP [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
CanExel siding [Member] | South America [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
CanExel siding [Member] | Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
CanExel siding [Member] | Intersegment [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
OSB - commodity [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 100.0 211.0 312.0 652.0
OSB - commodity [Member] | Siding [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 1.0 13.0 9.0 34.0
OSB - commodity [Member] | OSB [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 100.0 197.0 304.0 609.0
OSB - commodity [Member] | EWP [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 1.0 3.0 9.0
OSB - commodity [Member] | South America [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
OSB - commodity [Member] | Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
OSB - commodity [Member] | Intersegment [Member]        
Disaggregation of Revenue [Line Items]        
Revenues   0.0 (4.0) 0.0
OSB - value-add [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 130.0 185.0 406.0 571.0
OSB - value-add [Member] | Siding [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 22.0
OSB - value-add [Member] | OSB [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 96.0 151.0 295.0 435.0
OSB - value-add [Member] | EWP [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 2.0 4.0 7.0 11.0
OSB - value-add [Member] | South America [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 32.0 30.0 105.0 103.0
OSB - value-add [Member] | Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
OSB - value-add [Member] | Intersegment [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
LVL [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 37.0 36.0 108.0 113.0
LVL [Member] | Siding [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
LVL [Member] | OSB [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
LVL [Member] | EWP [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 37.0 36.0 108.0 113.0
LVL [Member] | South America [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
LVL [Member] | Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
LVL [Member] | Intersegment [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
LSL [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 12.0 18.0 39.0 49.0
LSL [Member] | Siding [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
LSL [Member] | OSB [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
LSL [Member] | EWP [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 12.0 18.0 40.0 49.0
LSL [Member] | South America [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
LSL [Member] | Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
LSL [Member] | Intersegment [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
I Joist [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 39.0 34.0 103.0 98.0
I Joist [Member] | Siding [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
I Joist [Member] | OSB [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
I Joist [Member] | EWP [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 39.0 34.0 103.0 98.0
I Joist [Member] | South America [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
I Joist [Member] | Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
I Joist [Member] | Intersegment [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
Plywood [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 7.0 8.0 19.0 23.0
Plywood [Member] | Siding [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
Plywood [Member] | OSB [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
Plywood [Member] | EWP [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 7.0 8.0 19.0 23.0
Plywood [Member] | South America [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
Plywood [Member] | Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
Plywood [Member] | Intersegment [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 19.0 17.0 55.0 52.0
Other [Member] | Siding [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 2.0 2.0 7.0 9.0
Other [Member] | OSB [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 2.0 2.0 6.0 6.0
Other [Member] | EWP [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 8.0 10.0 23.0 26.0
Other [Member] | South America [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 1.0 1.0 2.0 3.0
Other [Member] | Intersegment [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
Commodity [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 107.0 219.0 331.0 675.0
Commodity [Member] | Siding [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 1.0 13.0 9.0 34.0
Commodity [Member] | OSB [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 100.0 197.0 304.0 609.0
Commodity [Member] | EWP [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 7.0 9.0 22.0 32.0
Commodity [Member] | South America [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
Commodity [Member] | Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
Commodity [Member] | Intersegment [Member]        
Disaggregation of Revenue [Line Items]        
Revenues (1.0) 0.0 (4.0) 0.0
Value-add [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 478.0 502.0 1,387.0 1,512.0
Value-add [Member] | Siding [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 256.0 226.0 717.0 686.0
Value-add [Member] | OSB [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 96.0 151.0 295.0 435.0
Value-add [Member] | EWP [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 90.0 91.0 257.0 271.0
Value-add [Member] | South America [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 36.0 34.0 119.0 120.0
Value-add [Member] | Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 0.0 0.0
Value-add [Member] | Intersegment [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 0.0 0.0 (1.0) 0.0
Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 19.0 17.0 55.0 52.0
Other [Member] | Siding [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 2.0 2.0 7.0 9.0
Other [Member] | OSB [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 2.0 2.0 6.0 6.0
Other [Member] | EWP [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 8.0 10.0 23.0 26.0
Other [Member] | South America [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 1.0 1.0 2.0 3.0
Other [Member] | Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 6.0 3.0 16.0 9.0
Other [Member] | Intersegment [Member]        
Disaggregation of Revenue [Line Items]        
Revenues $ 0.0 $ 0.0 $ 0.0 $ 0.0