Segment and Revenue Information Segment and Revenue Information (Schedule of Revenue Disaggregation) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 15,217	$ 16,908
Commercial Airplanes | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	4,269	6,205
Commercial Airplanes | Operating Segments | External Customers
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 4,264	$ 6,193
Commercial Airplanes | Operating Segments | Fixed-price Contract
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	100.00%	100.00%
Commercial Airplanes | Operating Segments | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	100.00%	100.00%
Commercial Airplanes | Operating Segments | Non-US [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,941	$ 3,989
Commercial Airplanes | Operating Segments | Europe
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	873	1,970
Commercial Airplanes | Operating Segments | Asia
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	363	1,159
Commercial Airplanes | Operating Segments | Middle East
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	129	549
Commercial Airplanes | Operating Segments | Other
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	576	311
Commercial Airplanes | Operating Segments | United States
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,353	2,174
Commercial Airplanes | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenues	5	12
Defense, Space & Security | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	$ 7,185	$ 6,042
Defense, Space & Security | Operating Segments | U S Government Contracts
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	90.00%	89.00%
Defense, Space & Security | Operating Segments | Fixed-price Contract
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	70.00%	67.00%
Defense, Space & Security | Operating Segments | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	99.00%	99.00%
Defense, Space & Security | Operating Segments | Non-US [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,665	$ 1,726
Defense, Space & Security | Operating Segments | United States
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5,520	4,316
Global Services | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	3,749	4,628
Global Services | Operating Segments | Commercial Customers
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,625	2,523
Global Services | Operating Segments | Government Customers
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,070	2,033
Global Services | Operating Segments | External Customers
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,695	$ 4,556
Global Services | Operating Segments | U S Government Contracts
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	43.00%	35.00%
Global Services | Operating Segments | Fixed-price Contract
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	87.00%	89.00%
Global Services | Operating Segments | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	43.00%	55.00%
Global Services | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenues	$ 54	$ 72
B-737-Max | Customer Concessions | Commercial Airplanes | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ (30)	$ 30