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Transactions With Related Parties - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Related Party Transaction [Line Items] |  |  |  |  |
Carrying amount of LTP's assets | $ 8,982.1 |  | $ 8,982.1 |  | $ 8,681.1
Revenue from Contract with Customer, Excluding Assessed Tax, Total | 2,075.3 | $ 1,952.1 | $ 4,054.8 | $ 3,928.4 |
Boise Cascade Co-Owner of LTP |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Variable interest entity, ownership percentage |  |  | 50.00% |  |
Boise Cascade Co-Owner of LTP | Fiber |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total | 21.3 | 21.1 | $ 41.1 | 41.2 |
Boise Cascade Co-Owner of LTP | Wood Products, Including Chips and Logs |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Fiber costs from related parties | 3.1 | $ 3.1 | $ 5.7 | $ 6.0 |
Packaging Corporation of America |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Variable interest entity, ownership percentage |  |  | 50.00% |  |
Variable Interest Entity |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Carrying amount of LTP's assets | $ 4.1 |  | $ 4.1 |  |
Carrying amount of LTP's liabilities |  |  |  |  | $ 3.3

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