Inventories (Narrative) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Inventory supply agreement, inventories included in long-term contracts in progress	$ 1,145	$ 1,385
Long-term contracts in progress inventory related to inventory supply agreement, unsold launches	912
Reduction in earnings in the event ULA is unable to sell additional Delta II inventory	70
Claims or other uncertainties included in inventories	236	236
Capitalized Precontract Costs	911	527
Cash Or Other Credits	2,522	1,970
Airplane Program 787 [Member]
Work in process, including deferred production costs	12,684	9,461
Supplier advances	1,852	1,956
Unamortized tooling	1,677	1,447
Airplane Program 777 [Member]
Work in process, including deferred production costs	235	319
Unamortized tooling	$ 156	$ 170