Segment and Revenue Information Segment and Revenue Information (Schedule of Revenue Disaggregation) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 22,917	$ 23,382
Unallocated items, eliminations and other [Member]
Disaggregation of Revenue [Line Items]
Revenues	(201)	(59)
Global Services [Member] | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Revenues	4,619	3,950
Global Services [Member] | Operating Segments [Member] | Commercial Customers [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,585	2,079
Global Services [Member] | Operating Segments [Member] | Government Customers [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,997	1,812
Global Services [Member] | Operating Segments [Member] | External Customers [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 4,582	$ 3,891
Global Services [Member] | Operating Segments [Member] | U S Government Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	33.00%	37.00%
Global Services [Member] | Operating Segments [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	89.00%	88.00%
Global Services [Member] | Operating Segments [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	57.00%	54.00%
Global Services [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 37	$ 59
Commercial Airplanes Segment [Member] | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Revenues	11,822	12,945
Commercial Airplanes Segment [Member] | Operating Segments [Member] | External Customers [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 11,653	$ 12,932
Commercial Airplanes Segment [Member] | Operating Segments [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	100.00%	100.00%
Commercial Airplanes Segment [Member] | Operating Segments [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	100.00%	100.00%
Commercial Airplanes Segment [Member] | Operating Segments [Member] | Non-US [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 7,483	$ 8,932
Commercial Airplanes Segment [Member] | Operating Segments [Member] | Europe
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,661	3,199
Commercial Airplanes Segment [Member] | Operating Segments [Member] | China
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,546	2,047
Commercial Airplanes Segment [Member] | Operating Segments [Member] | Asia Other Than China
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,628	1,731
Commercial Airplanes Segment [Member] | Operating Segments [Member] | Middle East
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,110	461
Commercial Airplanes Segment [Member] | Operating Segments [Member] | Other
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,538	1,494
Commercial Airplanes Segment [Member] | Operating Segments [Member] | United States
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,170	4,000
Commercial Airplanes Segment [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenues	169	13
Defense, Space & Security [Member] | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 6,611	$ 6,481
Defense, Space & Security [Member] | Operating Segments [Member] | U S Government Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	88.00%	89.00%
Defense, Space & Security [Member] | Operating Segments [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	69.00%	70.00%
Defense, Space & Security [Member] | Operating Segments [Member] | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	98.00%	98.00%
Defense, Space & Security [Member] | Operating Segments [Member] | Non-US [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,704	$ 1,536
Defense, Space & Security [Member] | Operating Segments [Member] | United States
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 4,907	$ 4,945