Inventories (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Airplane Program 787 [Member]
Inventories [Line Items]
Inventory, work in process	$ 26,453	$ 21,289
Deferred production costs	20,189	15,929
Supplier advances	2,143	1,908
Unamortized tooling and other non-recurring costs	2,862	2,339
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders at the balance sheet date	14,657
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders	8,394
Airplane Program 747 [Member]
Inventories [Line Items]
Deferred production costs	1,237	1,292
Unamortized tooling and other non-recurring costs	611	683
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders at the balance sheet date	859
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders	989
Capitalized Precontract Costs [Member]
Inventories [Line Items]
Inventory subject to uncertainty	374	238
Early Issue Sales Consideration [Member]
Inventories [Line Items]
Inventory subject to uncertainty	3,502	2,989
ULA [Member]
Inventories [Line Items]
Inventory subject to uncertainty	425	725
ULA [Member] | Unsold Launches [Member]
Inventories [Line Items]
Inventory subject to uncertainty	390
A12 Program [Member]
Inventories [Line Items]
Inventory subject to uncertainty	$ 237	$ 237