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Commitments And Contingencies (Narrative) (Details)
$ in Millions
3 Months Ended
Mar. 31, 2017
USD ($)
aircraft
Mar. 31, 2016
USD ($)
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 $ 867     $ 857    
Letters of Credit Outstanding, Amount 3,960     4,701    
Increase/(Decrease) in Earnings from operations due to change in accounting estimate (32) $ 84        
Financing Commitment [Member]            
Commitments And Contingencies [Line Items]            
Other Commitment 14,067     14,847    
Total Contractual Trade-In Commitment [Member] | Commercial Aircraft Commitments [Member]            
Commitments And Contingencies [Line Items]            
Other Commitment 1,448     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 160     126    
Fair Value of Trade In Value of Aircraft [Member] | Commercial Aircraft Commitments [Member]            
Commitments And Contingencies [Line Items]            
Other Commitment $ 160     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 $ 14,067          
Ula [Member]            
Commitments And Contingencies [Line Items]            
Inventory subject to uncertainty $ 120     $ 120    
U.S. Navy [Member] | F/A-18 Program [Member]            
Commitments And Contingencies [Line Items]            
Number of Aircraft Included In Backlog | aircraft 29          
EMD Contract            
Commitments And Contingencies [Line Items]            
Contract Value           $ 4,900
Low Rate Initial Production [Member]            
Commitments And Contingencies [Line Items]            
Contract Value         $ 2,800  
LRIP 3 [Member]            
Commitments And Contingencies [Line Items]            
Contract Value     $ 2,100      
F/A-18 Program [Member] | Capitalized Precontract Costs [Member]            
Commitments And Contingencies [Line Items]            
Loss Contingency, Estimate of Possible Loss $ 43          
F/A-18 Program [Member] | Potential Termination Liabilities [Member]            
Commitments And Contingencies [Line Items]            
Loss Contingency, Estimate of Possible Loss 844          
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 288          
KC-46A Tanker [Member] | Potential Termination Liabilities [Member]            
Commitments And Contingencies [Line Items]            
Loss Contingency, Estimate of Possible Loss $ 345