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Inventories (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Semi finished inventory $ 20.5us-gaap_InventoryWorkInProcess $ 19.3us-gaap_InventoryWorkInProcess
Finished products 151.6us-gaap_InventoryFinishedGoods 149.6us-gaap_InventoryFinishedGoods
Total 262.1us-gaap_InventoryNet 229.8us-gaap_InventoryNet
Logs [Member]    
Logs 70.8us-gaap_InventoryRawMaterials
/ lpx_InventoryByTypeAxis
= lpx_LogsMember
39.6us-gaap_InventoryRawMaterials
/ lpx_InventoryByTypeAxis
= lpx_LogsMember
Other Raw Materials [Member]    
Logs $ 19.2us-gaap_InventoryRawMaterials
/ lpx_InventoryByTypeAxis
= lpx_OtherRawMaterialsMember
$ 21.3us-gaap_InventoryRawMaterials
/ lpx_InventoryByTypeAxis
= lpx_OtherRawMaterialsMember