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Inventory (Detail) - USD ($)
$ in Millions
Oct. 04, 2015
Dec. 31, 2014
Inventory Disclosure [Abstract]    
Work in process $ 1,882 $ 1,828
Raw materials 1,314 1,290
Finished goods 24 28
Pre-owned aircraft 19 75
Total inventories $ 3,239 $ 3,221