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Inventories (Inventory Disclosure Table) (Details) - USD ($)
$ in Millions
Sep. 30, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Long-term contracts in progress $ 966 $ 2,129
Commercial aircraft programs 63,518 52,753
Commercial spare parts, used aircraft, general stock materials and other 8,795 7,685
Total $ 73,279 $ 62,567