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Revenue (Notes) | 12 Months Ended
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Dec. 31, 2020
Disaggregation of Revenue [Line Items] |
Revenue from Contract with Customer [Text Block] | 3. REVENUE The following table presents our reportable segment revenues, disaggregated by revenue source. We disaggregate revenue from contracts with customers into major product lines. We have determined that disaggregating revenue into these categories depicts how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. During 2020, LP CanExel® prefinished siding was reclassified from Siding to our Other segment, reflecting changes in organizational structure and, accordingly, the information that the chief operating decision maker uses to evaluate performance and allocate resources to our business segments. All prior periods have been adjusted for comparability. As noted in the segment reporting information in Note 20 below, our reportable segments are: Siding, OSB, EWP, and South America.
Year Ended December 31, 2020
By Product type and family: | Siding |  | OSB |  | EWP |  | South America |  | Other |  | Inter-segment |  | Total
Value-add |  |  |  |  |  |  |  |  |  |  |  |  |
SmartSide | $ | 915 |  |  | $ | — |  |  | $ | — |  |  | $ | 20 |  |  | $ | — |  |  | $ | — |  |  | $ | 935 |
Fiber siding | 36 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 36 |
OSB - Structural Solutions | — |  |  | 580 |  |  | — |  |  | 146 |  |  | — |  |  | — |  |  | 726 |
I-joist | — |  |  | — |  |  | 148 |  |  | — |  |  | — |  |  | — |  |  | 148 |
LVL | — |  |  | — |  |  | 141 |  |  | — |  |  | — |  |  | — |  |  | 141 |
LSL | — |  |  | — |  |  | 45 |  |  | — |  |  | — |  |  | — |  |  | 45 |
| 951 |  |  | 580 |  |  | 334 |  |  | 166 |  |  | — |  |  | — |  |  | 2,031 |
Commodity |  |  |  |  |  |  |  |  |  |  |  |  |
OSB - commodity | — |  |  | 632 |  |  | — |  |  | — |  |  | — |  |  | (1) |  |  | 631 |
Plywood | — |  |  | — |  |  | 25 |  |  | — |  |  | — |  |  | — |  |  | 25 |
| — |  |  | 632 |  |  | 25 |  |  | — |  |  | — |  |  | (1) |  |  | 656 |
Other |  |  |  |  |  |  |  |  |  |  |  |  |
CanExel® siding | — |  |  | — |  |  | — |  |  | — |  |  | 14 |  |  | — |  |  | 14 |
Other products | 8 |  |  | 9 |  |  | 30 |  |  | 3 |  |  | 38 |  |  | — |  |  | 88 |
| $ | 959 |  |  | $ | 1,220 |  |  | $ | 389 |  |  | $ | 169 |  |  | $ | 52 |  |  | $ | (1) |  |  | $ | 2,788 |
Year Ended December 31, 2019
By Product type and family: | Siding |  | OSB |  | EWP |  | South America |  | Other |  | Inter-segment |  | Total
Value-add |  |  |  |  |  |  |  |  |  |  |  |  |
SmartSide | $ | 797 |  |  | $ | — |  |  | $ | — |  |  | $ | 19 |  |  | $ | — |  |  | $ | — |  |  | $ | 816 |
Fiber siding | 101 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 101 |
OSB - Structural Solutions | 1 |  |  | 381 |  |  | 8 |  |  | 138 |  |  | — |  |  | — |  |  | 528 |
I-joist | — |  |  | — |  |  | 137 |  |  | — |  |  | — |  |  | — |  |  | 137 |
LVL | — |  |  | — |  |  | 142 |  |  | — |  |  | — |  |  | — |  |  | 141 |
LSL | — |  |  | — |  |  | 50 |  |  | — |  |  | — |  |  | — |  |  | 50 |
| 899 |  |  | 381 |  |  | 337 |  |  | 156 |  |  | — |  |  | — |  |  | 1,773 |
Commodity |  |  |  |  |  |  |  |  |  |  |  |  |
OSB - commodity | 9 |  |  | 387 |  |  | 3 |  |  | — |  |  | — |  |  | (5) |  |  | 394 |
Plywood | — |  |  | — |  |  | 25 |  |  | — |  |  | — |  |  | — |  |  | 25 |
| 9 |  |  | 387 |  |  | 28 |  |  | — |  |  | — |  |  | (5) |  |  | 419 |
Other |  |  |  |  |  |  |  |  |  |  |  |  |
CanExel® siding | — |  |  | — |  |  | — |  |  | — |  |  | 46 |  |  | — |  |  | 46 |
Other products | 9 |  |  | 9 |  |  | 31 |  |  | 3 |  |  | 20 |  |  | — |  |  | 72 |
| $ | 917 |  |  | $ | 777 |  |  | $ | 396 |  |  | $ | 159 |  |  | $ | 66 |  |  | $ | (5) |  |  | $ | 2,310 |
Year Ended December 31, 2018
By Product type and family: | Siding |  | OSB |  | EWP |  | South America |  | Other |  | Inter-segment |  | Total
Value-add |  |  |  |  |  |  |  |  |  |  |  |  |
SmartSide | $ | 725 |  |  | $ | — |  |  | $ | — |  |  | $ | 22 |  |  | $ | — |  |  | $ | — |  |  | $ | 746 |
Fiber siding | 106 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 106 |
OSB - Structural Solutions | 23 |  |  | 551 |  |  | 14 |  |  | 135 |  |  | — |  |  | — |  |  | 723 |
I-joist | — |  |  | — |  |  | 122 |  |  | — |  |  | — |  |  | — |  |  | 122 |
LVL | — |  |  | — |  |  | 141 |  |  | — |  |  | — |  |  | — |  |  | 141 |
LSL | — |  |  | — |  |  | 59 |  |  | — |  |  | — |  |  | — |  |  | 59 |
| 854 |  |  | 551 |  |  | 336 |  |  | 157 |  |  | — |  |  | — |  |  | 1,898 |
Commodity |  |  |  |  |  |  |  |  |  |  |  |  |
OSB - commodity | 39 |  |  | 746 |  |  | 10 |  |  | — |  |  | — |  |  | — |  |  | 795 |
Plywood | — |  |  | — |  |  | 29 |  |  | — |  |  | — |  |  | — |  |  | 29 |
| 39 |  |  | 746 |  |  | 39 |  |  | — |  |  | — |  |  | — |  |  | 824 |
Other |  |  |  |  |  |  |  |  |  |  |  |  |
CanExel® siding | — |  |  | — |  |  | — |  |  | — |  |  | 37 |  |  | — |  |  | 37 |
Other products | 12 |  |  | 8 |  |  | 34 |  |  | 4 |  |  | 11 |  |  | — |  |  | 69 |
| $ | 905 |  |  | $ | 1,305 |  |  | $ | 409 |  |  | $ | 161 |  |  | $ | 48 |  |  | $ | — |  |  | 2,828 |
Revenue is recognized when obligations under the terms of a contract (i.e., purchase orders) with our customers are satisfied; generally, this occurs with the transfer of control of our products at a point in time. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods. The shipping cost incurred by us to deliver products to our customers is recorded in cost of sales. The expected costs associated with our warranties continue to be recognized as an expense when the products are sold. During 2020, 2019 and 2018, our top ten customers accounted for approximately 46%, 42% and 44% of our sales, respectively, in the aggregate. No individual customer exceeded 10% of our sales in 2020, 2019, or 2018. Our businesses routinely incur customer program costs to obtain favorable product placement, to promote sales of products and to maintain competitive pricing. Customer program costs and incentives, including rebates and promotion and volume allowances, are accounted for as deductions from net sales at the time the program is initiated. These reductions from revenue are recorded at the time of sale or the implementation of the program based on management’s best estimates. Estimates are based on historical and projected experience for each type of program or customer. Volume allowances are accrued based on management’s estimation of customer volume achievement and other factors incorporated into customer agreements, such as new product purchases, store sell-through, and merchandising support. Management adjusts accruals when circumstances indicate (typically as a result of a change in volume expectations). As of December 31, 2020, and 2019, we accrued $44 million and $34 million, respectively, as customer rebates recorded in Accounts payable and accrued liabilities on our Consolidated Balance Sheets. We ship some of our products to customers' distribution centers on a consignment basis. We retain title to our products stored at the distribution centers. As our products are removed from the distribution centers by retailers and shipped to retailers’ stores, title passes from us to the retailers. At that time, we invoice the retailers and recognize revenue for these consignment transactions. We do not offer a right of return for products shipped to the retailers’ stores from the distribution centers. The amount of consignment inventory as of December 31, 2020, and 2019, was $7 million and $12 million, respectively.

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -URI http://asc.fasb.org/topic&trid=49130388 + Details
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