Liabilities, Commitments And Contingencies (Narrative) (Details) $ in Millions	3 Months Ended			12 Months Ended
	Dec. 31, 2015 USD ($) aircraft contract	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Dec. 31, 2015 USD ($) aircraft contract	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Liabilities Commitments And Contingencies [Line Items]
Increase/(Decrease) in Earnings from operations due to change in accounting estimate.				$ (224)	$ 100	$ 242
Amount by which estimated range of reasonably possible remediation costs exceeded recorded liabilities	$ 853			853	874
Contingent liabilities on outstanding letters of credit agreements and surety bonds	4,968			4,968	3,985
Cash surrender value of life insurance policies	487			487	466
Total value of loans against underlying life insurance policies	$ 456			$ 456	439
C-17 Program [Member]
Liabilities Commitments And Contingencies [Line Items]
Number Unsold Aircraft | aircraft	1			1
Number Of Aircraft Included Within Backlog | aircraft	4			4
Number Unsold Aircraft | aircraft	6			6
Commercial Aircraft Commitments [Member] | Total Contractual Trade In Value Maximum [Member]
Liabilities Commitments And Contingencies [Line Items]
Other Commitment	$ 1,585			$ 1,585	2,392
Commercial Aircraft Commitments [Member] | Net amounts payable to customers related to probable contractual trade-in commitments [Member]
Liabilities Commitments And Contingencies [Line Items]
Other Commitment	240			240	446
Commercial Aircraft Commitments [Member] | Probable Contractual Trade In Value [Member]
Liabilities Commitments And Contingencies [Line Items]
Other Commitment	240			240	446
Financing Commitment [Member]
Liabilities Commitments And Contingencies [Line Items]
Other Commitment	16,283			16,283	16,723
Financing Commitment [Member] | External Credit Rating, Non Investment Grade [Member]
Liabilities Commitments And Contingencies [Line Items]
Other Commitment	$ 15,919			$ 15,919
Minimum [Member]
Liabilities Commitments And Contingencies [Line Items]
Trade-In Commitment Expiration Date				2016
Maximum [Member]
Liabilities Commitments And Contingencies [Line Items]
Trade-In Commitment Expiration Date				2026
KC-46A Tanker [Member]
Liabilities Commitments And Contingencies [Line Items]
Increase/(Decrease) in Earnings from operations due to change in accounting estimate.		$ (835)	$ (425)
Number of Contracts | contract	2			2
KC-46A Tanker [Member] | Capitalized Precontract Costs [Member]
Liabilities Commitments And Contingencies [Line Items]
Loss contingency, estimate of possible loss	$ 429			$ 429
KC-46A Tanker [Member] | Potential Termination Liabilities [Member]
Liabilities Commitments And Contingencies [Line Items]
Loss contingency, estimate of possible loss	1,589			$ 1,589
B747 aircraft [Member]
Liabilities Commitments And Contingencies [Line Items]
Reach-forward loss on commercial aircraft	$ (885)
Unfunded Priority List | F/A-18 Program [Member]
Liabilities Commitments And Contingencies [Line Items]
number of aircraft | aircraft	12			12
The President's Fiscal Year 2017 Budget request [Member] | F/A-18 Program [Member]
Liabilities Commitments And Contingencies [Line Items]
number of aircraft | aircraft	2			2
Low Rate Initial Production [Member] | KC-46A Tanker [Member]
Liabilities Commitments And Contingencies [Line Items]
number of aircraft | aircraft	19			19
Ula [Member]
Liabilities Commitments And Contingencies [Line Items]
Inventory Amount, Unpriced Change Orders for Long-term Contracts or Programs	$ 120			$ 120	$ 154
U.S. Navy [Member] | F/A-18 Program [Member]
Liabilities Commitments And Contingencies [Line Items]
Number Of Aircraft Included Within Backlog | aircraft	48			48
October 2015 [Member] | U.S. Navy [Member] | F/A-18 Program [Member]
Liabilities Commitments And Contingencies [Line Items]
Number Of Aircraft Included Within Backlog | aircraft	15			15