Inventories (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Inventories [Line Items]
Commercial spare parts, used aircraft, general stock materials and other	$ 6,585	$ 7,421
Progress Payments Netted Against Inventory for Long-term Contracts or Programs	29,296	29,266
Airplane Program 787 [Member]
Inventories [Line Items]
Inventory, work in process	35,212	33,163
Deferred production costs	27,732	26,149
Supplier advances	2,294	2,257
Unamortized tooling and other non-recurring costs	3,906	3,801
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders	22,379
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders	9,259
Airplane Program 747 [Member]
Inventories [Line Items]
Deferred production costs	1,787	1,741
Unamortized tooling and other non-recurring costs	426	476
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders	1,019
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders	1,194
Capitalized Precontract Costs [Member]
Inventories [Line Items]
Inventory subject to uncertainty	439	1,281
Early Issue Sales Consideration [Member]
Inventories [Line Items]
Inventory subject to uncertainty	3,327	3,341
Used Aircraft [Member]
Inventories [Line Items]
Commercial spare parts, used aircraft, general stock materials and other	232	275
ULA [Member]
Inventories [Line Items]
Inventory subject to uncertainty	115	154
Progress Payments Netted Against Inventory for Long-term Contracts or Programs	338	$ 322
ULA [Member] | Unsold Launches [Member]
Inventories [Line Items]
Inventory subject to uncertainty	$ 227