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Segment and Revenue Information (Narrative) (Details)
$ in Millions
12 Months Ended
Dec. 31, 2019
USD ($)
segments
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Segment Reporting Information [Line Items]      
Number of Reportable Segments | segments 4    
Percent of operating assets located outside the United States 4.00%    
Revenue, Remaining Performance Obligation, Amount $ 463,403    
Earnings from operations associated with our cost and equity method investments $ 90 $ 167 $ 233
Within Next fiscal Year [Member]      
Segment Reporting Information [Line Items]      
Revenue, Remaining Performance Obligation, Percent Recognized 17.00%    
Within Next 4 Fiscal Years [Member]      
Segment Reporting Information [Line Items]      
Revenue, Remaining Performance Obligation, Percent Recognized 63.00%    
Sales [Member] | U.S. Government Contracts [Member]      
Segment Reporting Information [Line Items]      
Entity-Wide Revenue, Major Customer, Percentage 39.00% 31.00% 31.00%
Intersegment Eliminations [Member]      
Segment Reporting Information [Line Items]      
Allocation of depreciation and amortization from centrally managed assets to the primary business segments based on usage and occupancy $ 717 $ 692 $ 730
Commercial Airplanes | Operating Segments      
Segment Reporting Information [Line Items]      
Allocation of depreciation and amortization from centrally managed assets to the primary business segments based on usage and occupancy 407 417 427
Defense, Space & Security | Operating Segments      
Segment Reporting Information [Line Items]      
Allocation of depreciation and amortization from centrally managed assets to the primary business segments based on usage and occupancy 257 213 243
Global Services | Operating Segments      
Segment Reporting Information [Line Items]      
Allocation of depreciation and amortization from centrally managed assets to the primary business segments based on usage and occupancy $ 53 $ 62 $ 60