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Inventories (Details) - USD ($)
$ in Millions
Sep. 30, 2019
Dec. 31, 2018
Inventory [Line Items]    
Logs $ 41.0 $ 57.0
Other raw materials 31.0 25.0
Semi-finished inventory 22.0 23.0
Finished products 166.0 168.0
Total $ 260.0 $ 273.0