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Revenue Disaggregation of revenue (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disaggregation of Revenue [Line Items]      
Net sales $ 2,788 $ 2,310 $ 2,828
Intersegment sales      
Disaggregation of Revenue [Line Items]      
Net sales (1) (5) 0
SmartSide Strand siding [Member]      
Disaggregation of Revenue [Line Items]      
Net sales 935 816 746
SmartSide Strand siding [Member] | Intersegment sales      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
SmartSide Fiber siding [Member]      
Disaggregation of Revenue [Line Items]      
Net sales 36 101 106
SmartSide Fiber siding [Member] | Intersegment sales      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
CanExel siding [Member]      
Disaggregation of Revenue [Line Items]      
Net sales 14 46 37
CanExel siding [Member] | Intersegment sales      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
OSB - commodity [Member]      
Disaggregation of Revenue [Line Items]      
Net sales 631 394 795
OSB - commodity [Member] | Intersegment sales      
Disaggregation of Revenue [Line Items]      
Net sales (1) (5) 0
OSB - value-add [Member]      
Disaggregation of Revenue [Line Items]      
Net sales 726 528 723
OSB - value-add [Member] | Intersegment sales      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
LVL [Member]      
Disaggregation of Revenue [Line Items]      
Net sales 141 141 141
LVL [Member] | Intersegment sales      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
LSL [Member]      
Disaggregation of Revenue [Line Items]      
Net sales 45 50 59
LSL [Member] | Intersegment sales      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
I Joist [Member]      
Disaggregation of Revenue [Line Items]      
Net sales 148 137 122
I Joist [Member] | Intersegment sales      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
Value-add [Member]      
Disaggregation of Revenue [Line Items]      
Net sales 2,031 1,773 1,898
Value-add [Member] | Intersegment sales      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
Plywood [Member]      
Disaggregation of Revenue [Line Items]      
Net sales 25 25 29
Plywood [Member] | Intersegment sales      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
Other products [Member]      
Disaggregation of Revenue [Line Items]      
Net sales 88 72 69
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 656 419 824
Commodity Products [Member] | Intersegment sales      
Disaggregation of Revenue [Line Items]      
Net sales (1) (5) 0
Siding | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 959 917 905
Siding | SmartSide Strand siding [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 915 797 725
Siding | SmartSide Fiber siding [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 36 101 106
Siding | CanExel siding [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 9 39
Siding | OSB - value-add [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 1 23
Siding | LVL [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
Siding | LSL [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
Siding | I Joist [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
Siding | Value-add [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 951 899 854
Siding | Plywood [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
Siding | Other products [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 8 9 12
Siding | Commodity Products [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 9 39
OSB | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 1,220 777 1,305
OSB | SmartSide Strand siding [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
OSB | SmartSide Fiber siding [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
OSB | CanExel siding [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
OSB | OSB - commodity [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 632 387 746
OSB | OSB - value-add [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 580 381 551
OSB | LVL [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
OSB | LSL [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
OSB | I Joist [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
OSB | Value-add [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 580 381 551
OSB | Plywood [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
OSB | Other products [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 9 9 8
OSB | Commodity Products [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 632 387 746
EWP | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 389 396 409
EWP | SmartSide Strand siding [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
EWP | SmartSide Fiber siding [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
EWP | CanExel siding [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
EWP | OSB - commodity [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 3 10
EWP | OSB - value-add [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 8 14
EWP | LVL [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 141 142 141
EWP | LSL [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 45 50 59
EWP | I Joist [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 148 137 122
EWP | Value-add [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 334 337 336
EWP | Plywood [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 25 25 29
EWP | Other products [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 30 31 34
EWP | Commodity Products [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 25 28 39
South America | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 169 159 161
South America | SmartSide Strand siding [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 20 19 22
South America | SmartSide Fiber siding [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
South America | CanExel siding [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
South America | OSB - commodity [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
South America | OSB - value-add [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 146 138 135
South America | LVL [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
South America | LSL [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
South America | I Joist [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
South America | Value-add [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 166 156 157
South America | Plywood [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
South America | Other products [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 3 3 4
South America | Commodity Products [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
Other | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 52 66 48
Other | SmartSide Strand siding [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
Other | SmartSide Fiber siding [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
Other | CanExel siding [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 14 46 37
Other | OSB - commodity [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
Other | OSB - value-add [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
Other | LVL [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
Other | LSL [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
Other | I Joist [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
Other | Value-add [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales 0 0 0
Other | Plywood [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 38 20 11
Other | Commodity Products [Member] | Operating Segments      
Disaggregation of Revenue [Line Items]      
Net sales $ 0 $ 0 $ 0