Inventories (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Inventories [Line Items]
Progress Payments Netted Against Inventory for Long-term Contracts or Programs	$ 28,409	$ 25,554
Airplane Program 787 [Member]
Inventories [Line Items]
Inventory, work in process	32,744	27,576
Deferred production costs	25,189	21,620
Supplier advances	2,216	2,189
Unamortized tooling and other non-recurring costs	3,565	3,377
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders	19,403
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders	9,351
Airplane Program 747 [Member]
Inventories [Line Items]
Deferred production costs	1,859	1,554
Unamortized tooling and other non-recurring costs	518	563
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders	1,113
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders	1,264
Capitalized Precontract Costs [Member]
Inventories [Line Items]
Inventory subject to uncertainty	1,478	520
Early Issue Sales Consideration [Member]
Inventories [Line Items]
Inventory subject to uncertainty	3,213	3,465
ULA [Member]
Inventories [Line Items]
Inventory subject to uncertainty	261	425
Progress Payments Netted Against Inventory for Long-term Contracts or Programs	307	331
ULA [Member] | Unsold Launches [Member]
Inventories [Line Items]
Inventory subject to uncertainty	$ 333