Commitments And Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jun. 30, 2014	Dec. 31, 2014
Quarterly Estimate Adjustment [Line Items]
Increase/(Decrease) in Earnings from operations due to change in accounting estimate.	$ 130	$ 167
Commitments And Contingencies [Line Items]
Loss Contingency, Range of Possible Loss, Portion Not Accrued	865			874
Letters of Credit Outstanding, Amount	3,585			3,985
C-17 Program [Member]
Commitments And Contingencies [Line Items]
Number of Aircraft Included In Backlog	2
Number of unsold aircraft	7
C-17 Program [Member] | Capitalized Precontract Costs [Member]
Commitments And Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	1,224
C-17 Program [Member] | Potential Termination Liabilities [Member]
Commitments And Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	204
F-18 Program [Member] | U.S. Navy [Member]
Commitments And Contingencies [Line Items]
Number of Aircraft Included In Backlog	57
Financing Commitment [Member]
Commitments And Contingencies [Line Items]
Other Commitment	15,853			16,723
Commitments to ULA [Member]
Commitments And Contingencies [Line Items]
Other Commitment	527
Total Contractual Trade-In Commitment [Member] | Commercial Aircraft Commitments [Member]
Commitments And Contingencies [Line Items]
Other Commitment	2,254			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	430			446
Fair Value of Trade In Value of Aircraft [Member] | Commercial Aircraft Commitments [Member]
Commitments And Contingencies [Line Items]
Other Commitment	430			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	15,853
U.S. Budget [Member] | F-18 Program [Member]
Commitments And Contingencies [Line Items]
Number of Aircraft	15
Navy Unfunded Priority List [Member] | F-18 Program [Member]
Commitments And Contingencies [Line Items]
Number of Aircraft	12
Commercial Airplanes Segment [Member]
Quarterly Estimate Adjustment [Line Items]
Increase/(Decrease) in Earnings from operations due to change in accounting estimate.			(238)
Boeing Defense Space Security Segment [Member]
Quarterly Estimate Adjustment [Line Items]
Increase/(Decrease) in Earnings from operations due to change in accounting estimate.			(187)
KC-46A Tanker [Member]
Quarterly Estimate Adjustment [Line Items]
Increase/(Decrease) in Earnings from operations due to change in accounting estimate.			$ (425)