Inventories (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Inventories [Line Items]
Progress Payments Netted Against Inventory for Long-term Contracts or Programs	$ 28,504	$ 29,266
Commercial spare parts, used aircraft, general stock materials and other	6,673	7,421
Airplane Program 787 [Member]
Inventories [Line Items]
Inventory, work in process	34,656	33,163
Deferred production costs	28,510	26,149
Supplier advances	2,551	2,257
Unamortized tooling and other non-recurring costs	3,890	3,801
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders at the balance sheet date	23,721
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders	8,679
Airplane Program 747 [Member]
Inventories [Line Items]
Deferred production costs	942	1,741
Unamortized tooling and other non-recurring costs	377	476
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders at the balance sheet date	342
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders	977
ULA [Member]
Inventories [Line Items]
Inventory subject to uncertainty	120	154
Progress Payments Netted Against Inventory for Long-term Contracts or Programs	310	322
Capitalized Precontract Costs [Member]
Inventories [Line Items]
Inventory subject to uncertainty	732	1,281
Early Issue Sales Consideration [Member]
Inventories [Line Items]
Inventory subject to uncertainty	3,166	3,341
Unsold Launches [Member] | ULA [Member]
Inventories [Line Items]
Inventory subject to uncertainty	176
Used Aircraft [Member]
Inventories [Line Items]
Commercial spare parts, used aircraft, general stock materials and other	$ 267	$ 275