Inventories (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Inventories [Line Items]
Progress Payments Netted Against Inventory for Long-term Contracts or Programs	$ 29,266	$ 25,554
Airplane Program 787 [Member]
Inventories [Line Items]
Inventory, work in process	33,163	27,576
Deferred production costs	26,149	21,620
Supplier advances	2,257	2,189
Unamortized tooling and other non-recurring costs	3,801	3,377
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders at the balance sheet date	20,982
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders	8,968
Airplane Program 747 [Member]
Inventories [Line Items]
Deferred production costs	1,741	1,554
Unamortized tooling and other non-recurring costs	476	563
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders at the balance sheet date	1,047
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders	1,170
Capitalized Precontract Costs [Member]
Inventories [Line Items]
Inventory subject to uncertainty	1,281	520
Early Issue Sales Consideration [Member]
Inventories [Line Items]
Inventory subject to uncertainty	3,341	3,465
ULA [Member]
Inventories [Line Items]
Inventory subject to uncertainty	154	425
Progress Payments Netted Against Inventory for Long-term Contracts or Programs	322	331
ULA [Member] | Unsold Launches [Member]
Inventories [Line Items]
Inventory subject to uncertainty	$ 292