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