Inventories (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Inventory [Line Items]
Other Inventory, Gross	$ 6,123	$ 6,673
Progress Payments Netted Against Inventory for Long-term Contracts or Programs	28,226	28,504
Inventory Write-down	1,235
Airplane Program 787 [Member]
Inventory [Line Items]
Inventory, Work in Process, Gross	34,123	34,656
Amount of Deferred Costs Related to Long-term Contracts	27,673	28,510
Advances on Inventory Purchases	2,412	2,551
Unamortized Tooling	3,707	3,890
Recovered Production Costs Excess Recoverable Under Existing Firm Orders	22,966
Unrecovered Production Costs, Excess Unrecoverable under Existing Firm Orders	8,414
Airplane Program 747 [Member]
Inventory [Line Items]
Amount of Deferred Costs Related to Long-term Contracts	0	942
Unamortized Tooling	369	377
Recovered Production Costs Excess Recoverable Under Existing Firm Orders	173
Unrecovered Production Costs, Excess Unrecoverable under Existing Firm Orders	196
Ula [Member]
Inventory [Line Items]
Inventory Amount, Unpriced Change Orders for Long-term Contracts or Programs	120	120
Progress Payments Netted Against Inventory for Long-term Contracts or Programs	276	310
Capitalized Precontract Costs [Member]
Inventory [Line Items]
Inventory Amount, Unpriced Change Orders for Long-term Contracts or Programs	1,561	732
Early Issue Sales Consideration [Member]
Inventory [Line Items]
Inventory Amount, Unpriced Change Orders for Long-term Contracts or Programs	3,217	3,166
Unsold Launches [Member] | Ula [Member]
Inventory [Line Items]
Inventory Amount, Unpriced Change Orders for Long-term Contracts or Programs	176
Used Aircraft [Member]
Inventory [Line Items]
Other Inventory, Gross	321	$ 267
Deferred production costs [Member]
Inventory [Line Items]
Inventory Write-down	$ 1,011