Transactions With Related Parties - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Related Party Transaction [Line Items]
Carrying amount of LTP's assets	$ 8,106.5		$ 8,106.5		$ 8,003.8
Revenue from Contract with Customer, Excluding Assessed Tax, Total	1,952.1	$ 2,237.3	$ 3,928.4	$ 4,373.7
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	21.1	23.5	$ 41.2	44.3
Boise Cascade Co-Owner of LTP | Wood Products, Including Chips and Logs
Related Party Transaction [Line Items]
Fiber costs from related parties	3.1	$ 3.6	$ 6.0	$ 7.4
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	$ 3.4		$ 3.4		$ 2.2