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Revenue Disaggregation of revenue (Details) - USD ($) $ in Millions | 12 Months Ended
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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

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