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Inventory (Details) - USD ($)
$ in Millions
Jul. 02, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Work in process $ 3,917 $ 3,643
Raw materials 1,360 1,429
Finished goods 27 24
Pre-owned aircraft 10 22
Other contract costs 525 699
Total inventories $ 5,839 $ 5,817