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Inventories (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Inventory [Line Items]    
Logs $ 73.0 $ 49.0
Other raw materials 38.0 36.0
Semi-finished inventory 34.0 28.0
Finished products 162.0 146.0
Total $ 307.0 $ 259.0