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Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Disaggregation of Revenue [Line Items] |  |  |  |  |
Rebates accrued | $ 27.5 |  | $ 27.5 |  | $ 24.2
Consignment inventory | 18.2 |  | 18.2 |  | $ 18.3
Revenue by product line and product type | 736.8 | $ 718.3 | 2,238.9 | $ 2,023.3 |
Siding [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 240.8 | 226.2 | 729.4 | 671.2 |
OSB [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 349.1 | 350.9 | 1,049.8 | 944.3 |
EWP [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 104.8 | 98.1 | 314.6 | 274.4 |
South America [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 34.5 | 38.3 | 122.2 | 114.8 |
Other [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 7.6 | 6.5 | 22.9 | 22.3 |
Intersegment [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | (1.7) | 0.0 | (3.7) |
SmartSide Strand siding [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 191.1 | 163.2 | 563.4 | 492.6 |
SmartSide Strand siding [Member] | Siding [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 187.7 | 161.6 | 546.3 | 482.0 |
SmartSide Strand siding [Member] | OSB [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
SmartSide Strand siding [Member] | EWP [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
SmartSide Strand siding [Member] | South America [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 3.4 | 3.3 | 17.1 | 14.1 |
SmartSide Strand siding [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
SmartSide Strand siding [Member] | Intersegment [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | (1.7) | 0.0 | (3.5) |
SmartSide Fiber siding [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 30.4 | 28.4 | 84.2 | 86.4 |
SmartSide Fiber siding [Member] | Siding [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 30.4 | 28.4 | 84.2 | 86.4 |
SmartSide Fiber siding [Member] | OSB [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
SmartSide Fiber siding [Member] | EWP [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
SmartSide Fiber siding [Member] | South America [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
SmartSide Fiber siding [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
SmartSide Fiber siding [Member] | Intersegment [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
CanExel siding [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 7.0 | 13.1 | 33.4 | 41.6 |
CanExel siding [Member] | Siding [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 7.0 | 13.1 | 33.4 | 41.6 |
CanExel siding [Member] | OSB [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
CanExel siding [Member] | EWP [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
CanExel siding [Member] | South America [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
CanExel siding [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
CanExel siding [Member] | Intersegment [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
OSB - commodity [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 210.8 | 231.5 | 651.9 | 612.0 |
OSB - commodity [Member] | Siding [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 13.3 | 20.2 | 34.4 | 53.6 |
OSB - commodity [Member] | OSB [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 196.5 | 209.5 | 608.5 | 551.5 |
OSB - commodity [Member] | EWP [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 1.0 | 1.8 | 9.0 | 6.9 |
OSB - commodity [Member] | South America [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
OSB - commodity [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
OSB - commodity [Member] | Intersegment [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
OSB - value-add [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 185.2 | 176.5 | 571.3 | 492.0 |
OSB - value-add [Member] | Siding [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.4 | 0.0 | 22.0 | 0.0 |
OSB - value-add [Member] | OSB [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 150.9 | 139.1 | 435.4 | 384.3 |
OSB - value-add [Member] | EWP [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 3.5 | 3.4 | 11.4 | 9.9 |
OSB - value-add [Member] | South America [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 30.4 | 34.0 | 102.5 | 97.8 |
OSB - value-add [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
OSB - value-add [Member] | Intersegment [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
LVL [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 35.7 | 37.7 | 112.7 | 107.9 |
LVL [Member] | Siding [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
LVL [Member] | OSB [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
LVL [Member] | EWP [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 35.7 | 37.7 | 112.7 | 107.9 |
LVL [Member] | South America [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
LVL [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
LVL [Member] | Intersegment [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
LSL [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 18.1 | 12.5 | 48.8 | 35.1 |
LSL [Member] | Siding [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
LSL [Member] | OSB [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
LSL [Member] | EWP [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 18.1 | 12.5 | 48.8 | 35.1 |
LSL [Member] | South America [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
LSL [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
LSL [Member] | Intersegment [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
I Joist [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 34.1 | 32.0 | 97.7 | 88.1 |
I Joist [Member] | Siding [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
I Joist [Member] | OSB [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
I Joist [Member] | EWP [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 34.1 | 32.0 | 97.7 | 88.1 |
I Joist [Member] | South America [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
I Joist [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
I Joist [Member] | Intersegment [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
Plywood [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 7.7 | 8.2 | 23.3 | 18.8 |
Plywood [Member] | Siding [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
Plywood [Member] | OSB [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
Plywood [Member] | EWP [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 7.7 | 8.2 | 23.3 | 18.8 |
Plywood [Member] | South America [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
Plywood [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
Plywood [Member] | Intersegment [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
Other [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 16.7 | 15.2 | 52.2 | 48.8 |
Other [Member] | Siding [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 2.0 | 2.9 | 9.1 | 7.6 |
Other [Member] | OSB [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 1.7 | 2.3 | 5.9 | 8.5 |
Other [Member] | EWP [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 4.7 | 2.5 | 11.7 | 7.7 |
Other [Member] | South America [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.7 | 1.0 | 2.6 | 2.9 |
Other [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 7.6 | 6.5 | 22.9 | 22.3 |
Other [Member] | Intersegment [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | (0.2) |
Commodity [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 218.5 | 239.7 | 675.2 | 630.8 |
Commodity [Member] | Siding [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 13.3 | 20.2 | 34.4 | 53.6 |
Commodity [Member] | OSB [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 196.5 | 209.5 | 608.5 | 551.5 |
Commodity [Member] | EWP [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 8.7 | 10.0 | 32.3 | 25.7 |
Commodity [Member] | South America [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
Commodity [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
Commodity [Member] | Intersegment [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
Value-add [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 501.6 | 463.4 | 1,511.5 | 1,343.7 |
Value-add [Member] | Siding [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 225.5 | 203.1 | 685.9 | 610.0 |
Value-add [Member] | OSB [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 150.9 | 139.1 | 435.4 | 384.3 |
Value-add [Member] | EWP [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 91.4 | 85.6 | 270.6 | 241.0 |
Value-add [Member] | South America [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 33.8 | 37.3 | 119.6 | 111.9 |
Value-add [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | 0.0 | 0.0 | 0.0 |
Value-add [Member] | Intersegment [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.0 | (1.7) | 0.0 | (3.5) |
Other [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 16.7 | 15.2 | 52.2 | 48.8 |
Other [Member] | Siding [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 2.0 | 2.9 | 9.1 | 7.6 |
Other [Member] | OSB [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 1.7 | 2.3 | 5.9 | 8.5 |
Other [Member] | EWP [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 4.7 | 2.5 | 11.7 | 7.7 |
Other [Member] | South America [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 0.7 | 1.0 | 2.6 | 2.9 |
Other [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | 7.6 | 6.5 | 22.9 | 22.3 |
Other [Member] | Intersegment [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue by product line and product type | $ 0.0 | $ 0.0 | $ 0.0 | $ (0.2) |

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