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Commitments And Contingencies (Narrative) (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
USD ($)
aircraft
Mar. 31, 2017
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
aircraft
Jun. 30, 2016
USD ($)
Jan. 27, 2017
USD ($)
Dec. 31, 2016
USD ($)
Aug. 31, 2016
USD ($)
Dec. 31, 2011
USD ($)
Commitments And Contingencies [Line Items]                  
Loss Contingency, Range of Possible Loss, Portion Not Accrued $ 852     $ 852     $ 857    
Letters of Credit Outstanding, Amount 3,858     3,858     4,701    
Increase/(Decrease) in Earnings from operations due to change in accounting estimate (231)   $ 503 (263) $ 587        
Financing Commitment [Member]                  
Commitments And Contingencies [Line Items]                  
Other Commitment 13,467     13,467     14,847    
Total Contractual Trade-In Commitment [Member] | Commercial Aircraft Commitments [Member]                  
Commitments And Contingencies [Line Items]                  
Other Commitment 1,719     1,719     1,485    
Net Amounts Payable to Customers Related to Probable Contractual Trade-In Commitments [Member] | Commercial Aircraft Commitments [Member]                  
Commitments And Contingencies [Line Items]                  
Other Commitment 107     107     126    
Fair Value of Trade In Value of Aircraft [Member] | Commercial Aircraft Commitments [Member]                  
Commitments And Contingencies [Line Items]                  
Other Commitment 107     $ 107     126    
Minimum [Member]                  
Commitments And Contingencies [Line Items]                  
Trade-In Commitment Expiration Date       2017          
Maximum [Member]                  
Commitments And Contingencies [Line Items]                  
Trade-In Commitment Expiration Date       2026          
External Credit Rating, Non Investment Grade [Member] | Financing Commitment [Member]                  
Commitments And Contingencies [Line Items]                  
Other Commitment 13,467     $ 13,467          
Ula [Member]                  
Commitments And Contingencies [Line Items]                  
Inventory subject to uncertainty $ 120     $ 120     $ 120    
U.S. Navy [Member] | F/A-18 Program [Member]                  
Commitments And Contingencies [Line Items]                  
Number of Aircraft Included In Backlog | aircraft 23     23          
F/A-18 Program [Member] | Capitalized Precontract Costs [Member]                  
Commitments And Contingencies [Line Items]                  
Loss Contingency, Estimate of Possible Loss $ 91     $ 91          
F/A-18 Program [Member] | Potential Termination Liabilities [Member]                  
Commitments And Contingencies [Line Items]                  
Loss Contingency, Estimate of Possible Loss 999     999          
KC-46A Tanker [Member]                  
Commitments And Contingencies [Line Items]                  
Increase/(Decrease) in Earnings from operations due to change in accounting estimate   $ 142              
KC-46A Tanker [Member] | Capitalized Precontract Costs [Member]                  
Commitments And Contingencies [Line Items]                  
Loss Contingency, Estimate of Possible Loss 298     298          
KC-46A Tanker [Member] | Potential Termination Liabilities [Member]                  
Commitments And Contingencies [Line Items]                  
Loss Contingency, Estimate of Possible Loss $ 525     $ 525          
KC-46A Tanker [Member] | EMD Contract                  
Commitments And Contingencies [Line Items]                  
Contract Value                 $ 4,900
KC-46A Tanker [Member] | Low Rate Initial Production [Member]                  
Commitments And Contingencies [Line Items]                  
Contract Value               $ 2,800  
KC-46A Tanker [Member] | LRIP 3 [Member]                  
Commitments And Contingencies [Line Items]                  
Contract Value           $ 2,100