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Inventories (Inventory Disclosure Table) (Details) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Long-term contracts in progress $ 990 $ 1,187
Commercial aircraft programs 68,719 66,016
Commercial spare parts, used aircraft, general stock materials and other 10,311 9,419
Total $ 80,020 $ 76,622