XML 24 R79.htm IDEA: XBRL DOCUMENT v2.4.1.9
Segment and Geographical Area Information, Revenues from External Customers by Products (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Revenue from External Customer                      
Non-cash impairment charges                 $ 1.5us-gaap_AssetImpairmentCharges $ 0us-gaap_AssetImpairmentCharges $ 4.4us-gaap_AssetImpairmentCharges
Net sales 338.0us-gaap_SalesRevenueGoodsNet 338.9us-gaap_SalesRevenueGoodsNet 344.1us-gaap_SalesRevenueGoodsNet 335.1us-gaap_SalesRevenueGoodsNet 311.3us-gaap_SalesRevenueGoodsNet 319.9us-gaap_SalesRevenueGoodsNet 328.9us-gaap_SalesRevenueGoodsNet 337.4us-gaap_SalesRevenueGoodsNet 1,356.1us-gaap_SalesRevenueGoodsNet 1,297.5us-gaap_SalesRevenueGoodsNet 1,360.1us-gaap_SalesRevenueGoodsNet
Aero/HS products                      
Revenue from External Customer                      
Net sales                 686.3us-gaap_SalesRevenueGoodsNet
/ us-gaap_ProductOrServiceAxis
= kalu_AeroHsProductsMember		 677.0us-gaap_SalesRevenueGoodsNet
/ us-gaap_ProductOrServiceAxis
= kalu_AeroHsProductsMember		 695.1us-gaap_SalesRevenueGoodsNet
/ us-gaap_ProductOrServiceAxis
= kalu_AeroHsProductsMember
Automotive Extrusions                      
Revenue from External Customer                      
Net sales                 173.5us-gaap_SalesRevenueGoodsNet
/ us-gaap_ProductOrServiceAxis
= kalu_AutomotiveExtrusionsMember		 129.5us-gaap_SalesRevenueGoodsNet
/ us-gaap_ProductOrServiceAxis
= kalu_AutomotiveExtrusionsMember		 125.5us-gaap_SalesRevenueGoodsNet
/ us-gaap_ProductOrServiceAxis
= kalu_AutomotiveExtrusionsMember
GE products                      
Revenue from External Customer                      
Net sales                 419.5us-gaap_SalesRevenueGoodsNet
/ us-gaap_ProductOrServiceAxis
= kalu_GeProductsMember		 411.0us-gaap_SalesRevenueGoodsNet
/ us-gaap_ProductOrServiceAxis
= kalu_GeProductsMember		 441.4us-gaap_SalesRevenueGoodsNet
/ us-gaap_ProductOrServiceAxis
= kalu_GeProductsMember
Other products                      
Revenue from External Customer                      
Net sales                 $ 76.8us-gaap_SalesRevenueGoodsNet
/ us-gaap_ProductOrServiceAxis
= kalu_OtherProductsMember		 $ 80.0us-gaap_SalesRevenueGoodsNet
/ us-gaap_ProductOrServiceAxis
= kalu_OtherProductsMember		 $ 98.1us-gaap_SalesRevenueGoodsNet
/ us-gaap_ProductOrServiceAxis
= kalu_OtherProductsMember