Inventories (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Inventories [Line Items]
Commercial spare parts, used aircraft, general stock materials and other	$ 6,506	$ 7,421
Progress Payments Netted Against Inventory for Long-term Contracts or Programs	28,435	29,266
Airplane Program 787 [Member]
Inventories [Line Items]
Inventory, work in process	35,282	33,163
Deferred production costs	28,309	26,149
Supplier advances	2,267	2,257
Unamortized tooling and other non-recurring costs	3,908	3,801
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders	22,496
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders	9,721
Airplane Program 747 [Member]
Inventories [Line Items]
Deferred production costs	1,891	1,741
Unamortized tooling and other non-recurring costs	405	476
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders	739
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders	1,557
Capitalized Precontract Costs [Member]
Inventories [Line Items]
Inventory subject to uncertainty	664	1,281
Early Issue Sales Consideration [Member]
Inventories [Line Items]
Inventory subject to uncertainty	3,109	3,341
Used Aircraft [Member]
Inventories [Line Items]
Commercial spare parts, used aircraft, general stock materials and other	248	275
ULA [Member]
Inventories [Line Items]
Inventory subject to uncertainty	120	154
Progress Payments Netted Against Inventory for Long-term Contracts or Programs	317	$ 322
ULA [Member] | Unsold Launches [Member]
Inventories [Line Items]
Inventory subject to uncertainty	$ 222