Inventories (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Airplane Program 787 [Member]
Inventories [Line Items]
Inventory, work in process	$ 24,358	$ 21,289
Deferred production costs	17,095	15,929
Supplier advances	1,947	1,908
Unamortized tooling and other non-recurring costs	2,508	2,339
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders at the balance sheet date	14,525
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders	5,078
Airplane Program 747 [Member]
Inventories [Line Items]
Deferred production costs	1,312	1,292
Unamortized tooling and other non-recurring costs	653	683
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders at the balance sheet date	1,046
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders	919
Capitalized Precontract Costs [Member]
Inventories [Line Items]
Inventory subject to uncertainty	261	238
Early Issue Sales Consideration [Member]
Inventories [Line Items]
Inventory subject to uncertainty	3,083	2,989
ULA [Member]
Inventories [Line Items]
Inventory subject to uncertainty	725	725
ULA [Member] | Unsold Launches [Member]
Inventories [Line Items]
Inventory subject to uncertainty	440
A12 Program [Member]
Inventories [Line Items]
Inventory subject to uncertainty	$ 237	$ 237