Liabilities, Commitments And Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended				3 Months Ended	6 Months Ended	3 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 Environmental Remediation Expense [Member]	Dec. 31, 2010 Environmental Remediation Expense [Member]	Mar. 31, 2011 C-17 Program [Member]	Jun. 30, 2011 C-17 Planned Production Rate Decrease From [Member]	Sep. 30, 2011 C-17 Planned Production Rate Decrease To [Member]	Dec. 31, 2011 Performance Guarantee [Member] C-17 Program [Member]	Dec. 31, 2011 Performance Guarantee [Member] F-15 Program [Member]	Dec. 31, 2011 Orders [Member] C-17 Program [Member]
Liabilities Commitments And Contingencies [Line Items]
Amount by which reasonably possible remediation costs exceeded recorded liabilities			$ 1,003	$ 957
Financing commitments	15,866	9,865
Contingent liabilities on outstanding letters of credit agreements and surety bonds	6,199	7,599
Total contractual trade-in value of commercial aircraft	273	295
Fair value of trade-in aircraft	27	30
Expiration date of trade in commitment agreements maximum	2023
Expiration date of trade in commitment agreements minimum	2012
Commitment to provide ULA with additional capital contributions, maximum	352
Inventory expenditures and potential termination liabilities to suppliers								940	2,275	870
Pension curtailment charges					34
Planned production rate change						15	10
GECC Loss Sharing Arrangement, Maximum Future Cash Exposure To Losses	212	232
Accrued liability under the loss sharing arrangement	51	82
Cash surrender value of life insurance policies	397	381
Total value of loans against underlying life insurance policies	$ 377	$ 363