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Inventories - Inventories (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 914us-gaap_InventoryRawMaterialsAndSupplies $ 947us-gaap_InventoryRawMaterialsAndSupplies
Work-in-process 241us-gaap_InventoryWorkInProcess 273us-gaap_InventoryWorkInProcess
Finished goods 362us-gaap_InventoryFinishedGoods 339us-gaap_InventoryFinishedGoods
Tooling and engineering 1,240us-gaap_OtherInventory 1,078us-gaap_OtherInventory
Inventory, net, total $ 2,757us-gaap_InventoryNet $ 2,637us-gaap_InventoryNet