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Commitments And Contingencies (Narrative) (Details)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
USD ($)
aircraft
Jun. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
aircraft
Sep. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
Quarterly Estimate Adjustment [Line Items]            
Increase/(Decrease) in Earnings from operations due to change in accounting estimate $ 210   $ 91 $ (384) $ (54)  
Commitments And Contingencies [Line Items]            
Loss Contingency, Range of Possible Loss, Portion Not Accrued 845     845   $ 874
Letters of Credit Outstanding, Amount $ 4,735     $ 4,735   3,985
C-17 Program [Member]            
Commitments And Contingencies [Line Items]            
Number of Aircraft Included In Backlog | aircraft 4     4    
Number of unsold aircraft | aircraft 1     1    
Number of Aircraft Ordered | aircraft 6     6    
F-18 Program [Member] | U.S. Navy [Member]            
Commitments And Contingencies [Line Items]            
Number of Aircraft Included In Backlog | aircraft 40     40    
Financing Commitment [Member]            
Commitments And Contingencies [Line Items]            
Other Commitment $ 17,858     $ 17,858   16,723
Total Contractual Trade-In Commitment [Member] | Commercial Aircraft Commitments [Member]            
Commitments And Contingencies [Line Items]            
Other Commitment 1,601     1,601   2,392
Net Amounts Payable to Customers Related to Probable Contractual Trade-In Commitments [Member] | Commercial Aircraft Commitments [Member]            
Commitments And Contingencies [Line Items]            
Other Commitment 345     345   446
Fair Value of Trade In Value of Aircraft [Member] | Commercial Aircraft Commitments [Member]            
Commitments And Contingencies [Line Items]            
Other Commitment 345     $ 345   446
Minimum [Member]            
Commitments And Contingencies [Line Items]            
Trade-In Commitment Expiration Date       2015    
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 $ 17,842     $ 17,842    
Commercial Airplanes Segment [Member]            
Quarterly Estimate Adjustment [Line Items]            
Increase/(Decrease) in Earnings from operations due to change in accounting estimate   $ (513)        
Boeing Defense Space Security Segment [Member]            
Quarterly Estimate Adjustment [Line Items]            
Increase/(Decrease) in Earnings from operations due to change in accounting estimate   (322)        
U.S. Budget [Member] | F-18 Program [Member]            
Commitments And Contingencies [Line Items]            
Number of Aircraft | aircraft 15     15    
Navy Unfunded Priority List [Member] | F-18 Program [Member]            
Commitments And Contingencies [Line Items]            
Number of Aircraft | aircraft 12     12    
KC-46A Tanker [Member]            
Quarterly Estimate Adjustment [Line Items]            
Increase/(Decrease) in Earnings from operations due to change in accounting estimate   $ (835)        
Ula [Member]            
Commitments And Contingencies [Line Items]            
Inventory subject to uncertainty $ 120     $ 120   $ 154