Inventories (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Airplane Program 787 [Member]
Inventories [Line Items]
Inventory, work in process	$ 30,246	$ 27,576
Deferred production costs	23,123	21,620
Supplier advances	2,303	2,189
Unamortized tooling and other non-recurring costs	3,453	3,377
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders	17,838
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders	8,737
Airplane Program 747 [Member]
Inventories [Line Items]
Deferred production costs	1,649	1,554
Unamortized tooling and other non-recurring costs	552	563
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders	1,189
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders	1,012
Capitalized Precontract Costs [Member]
Inventories [Line Items]
Inventory subject to uncertainty	826	520
Early Issue Sales Consideration [Member]
Inventories [Line Items]
Inventory subject to uncertainty	3,433	3,465
ULA [Member]
Inventories [Line Items]
Inventory subject to uncertainty	350	425
ULA [Member] | Unsold Launches [Member]
Inventories [Line Items]
Inventory subject to uncertainty	$ 333