v3.25.2
Transactions With Related Parties - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Related Party Transaction [Line Items]          
Carrying amount of LTP's assets $ 9,041.2 $ 8,982.1 $ 9,041.2 $ 8,982.1 $ 8,833.2
Net sales 2,171.3 2,075.3 $ 4,312.3 4,054.8  
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]          
Net sales 17.9 21.3 $ 32.8 41.1  
Boise Cascade Co-Owner of LTP | Wood Products, Including Chips and Logs          
Related Party Transaction [Line Items]          
Fiber costs from related parties 2.4 $ 3.1 $ 4.0 $ 5.7  
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 liabilities $ 4.3   $ 4.3   $ 3.1