Segment and Revenue Information - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Disaggregation of Revenue [Line Items]
Total revenues	$ 24,188	$ 23,270	$ 70,965	$ 65,515
Commercial Airplanes \| Operating Segments
Disaggregation of Revenue [Line Items]
Total revenues	10,720	11,094	31,674	30,115
Commercial Airplanes \| Operating Segments \| Customer Concessions \| B-737-Max
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax			80	5
Commercial Airplanes \| Operating Segments \| Total revenues from contracts with customers
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	$ 10,604	$ 11,029	$ 31,432	$ 30,003
Commercial Airplanes \| Operating Segments \| Revenue recognized on fixed-price contracts
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax, percentage	100.00%	100.00%	100.00%	100.00%
Commercial Airplanes \| Operating Segments \| Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax, percentage	99.00%	100.00%	99.00%	100.00%
Commercial Airplanes \| Operating Segments \| United States
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	$ 3,695	$ 3,182	$ 10,585	$ 12,326
Commercial Airplanes \| Operating Segments \| Total non-U.S. revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	6,909	7,847	20,767	17,672
Commercial Airplanes \| Operating Segments \| Europe
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	2,684	2,291	7,791	3,789
Commercial Airplanes \| Operating Segments \| Asia
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	2,591	3,509	7,055	8,888
Commercial Airplanes \| Operating Segments \| Middle East
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	1,243	1,266	4,149	3,026
Commercial Airplanes \| Operating Segments \| Other non-U.S.
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	391	781	1,772	1,969
Commercial Airplanes \| Intersegment revenues eliminated on consolidation
Disaggregation of Revenue [Line Items]
Total revenues	116	65	242	112
Defense, Space & Security \| Operating Segments
Disaggregation of Revenue [Line Items]
Total revenues	$ 7,935	$ 6,902	$ 23,017	$ 19,817
Defense, Space & Security \| Operating Segments \| Revenue from the U.S. government
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax, percentage	93.00%	91.00%	93.00%	91.00%
Defense, Space & Security \| Operating Segments \| Revenue recognized on fixed-price contracts
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax, percentage	57.00%	56.00%	59.00%	57.00%
Defense, Space & Security \| Operating Segments \| Revenue recognized over time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax, percentage	100.00%	99.00%	100.00%	100.00%
Defense, Space & Security \| Operating Segments \| United States
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	$ 6,307	$ 5,325	$ 18,402	$ 15,485
Defense, Space & Security \| Operating Segments \| Total non-U.S. revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	1,628	1,577	4,615	4,332
Global Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Total revenues	5,574	5,370	16,288	15,714
Global Services \| Operating Segments \| Commercial
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	3,100	3,088	9,133	9,055
Global Services \| Operating Segments \| Government
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	2,379	2,169	6,850	6,337
Global Services \| Operating Segments \| Total revenues from contracts with customers
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	$ 5,479	$ 5,257	$ 15,983	$ 15,392
Global Services \| Operating Segments \| Revenue from the U.S. government
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax, percentage	32.00%	30.00%	32.00%	30.00%
Global Services \| Operating Segments \| Revenue recognized on fixed-price contracts
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax, percentage	85.00%	85.00%	86.00%	86.00%
Global Services \| Operating Segments \| Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax, percentage	54.00%	53.00%	55.00%	53.00%
Global Services \| Intersegment revenues eliminated on consolidation
Disaggregation of Revenue [Line Items]
Total revenues	$ 95	$ 113	$ 305	$ 322