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Inventories (Inventory Disclosure Table) (Details) - USD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Long-term contracts in progress $ 857 $ 2,129
Commercial aircraft programs 58,691 52,753
Commercial spare parts, used aircraft, general stock materials and other 8,944 7,685
Total $ 68,492 $ 62,567