Segment Financial Data (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Net sales	$ 20,306	$ 19,305
Products
Segment Reporting Information [Line Items]
Net sales	14,591	14,303
Services
Segment Reporting Information [Line Items]
Net sales	5,715	5,002
Sales to the U.S. government
Segment Reporting Information [Line Items]
Net sales	7,732	8,127
Foreign military sales through the U.S. government
Segment Reporting Information [Line Items]
Net sales	1,471	1,249
Foreign government direct commercial sales
Segment Reporting Information [Line Items]
Net sales	1,352	1,208
Commercial aerospace and other commercial sales
Segment Reporting Information [Line Items]
Net sales	9,751	8,721
U.S.
Segment Reporting Information [Line Items]
Net sales	11,266	11,361
Europe
Segment Reporting Information [Line Items]
Net sales	4,413	3,833
Asia Pacific
Segment Reporting Information [Line Items]
Net sales	2,592	2,427
Middle East and North Africa
Segment Reporting Information [Line Items]
Net sales	848	849
Other regions
Segment Reporting Information [Line Items]
Net sales	1,187	835
Collins Aerospace
Segment Reporting Information [Line Items]
Net sales	6,587	6,169
Pratt & Whitney
Segment Reporting Information [Line Items]
Net sales	7,365	6,456
Raytheon
Segment Reporting Information [Line Items]
Net sales	6,300	6,630
Other
Segment Reporting Information [Line Items]
Net sales	54	50
Operating segments
Segment Reporting Information [Line Items]
Net sales	20,923	19,788
Operating segments | Collins Aerospace
Segment Reporting Information [Line Items]
Net sales	7,217	6,673
Operating segments | Collins Aerospace | Products
Segment Reporting Information [Line Items]
Net sales	5,110	4,833
Operating segments | Collins Aerospace | Services
Segment Reporting Information [Line Items]
Net sales	1,477	1,336
Operating segments | Collins Aerospace | Sales to the U.S. government
Segment Reporting Information [Line Items]
Net sales	1,659	1,564
Operating segments | Collins Aerospace | Foreign military sales through the U.S. government
Segment Reporting Information [Line Items]
Net sales	116	81
Operating segments | Collins Aerospace | Foreign government direct commercial sales
Segment Reporting Information [Line Items]
Net sales	327	309
Operating segments | Collins Aerospace | Commercial aerospace and other commercial sales
Segment Reporting Information [Line Items]
Net sales	4,485	4,215
Operating segments | Collins Aerospace | U.S.
Segment Reporting Information [Line Items]
Net sales	3,348	3,321
Operating segments | Collins Aerospace | Europe
Segment Reporting Information [Line Items]
Net sales	1,730	1,615
Operating segments | Collins Aerospace | Asia Pacific
Segment Reporting Information [Line Items]
Net sales	826	691
Operating segments | Collins Aerospace | Middle East and North Africa
Segment Reporting Information [Line Items]
Net sales	239	181
Operating segments | Collins Aerospace | Other regions
Segment Reporting Information [Line Items]
Net sales	444	361
Operating segments | Pratt & Whitney
Segment Reporting Information [Line Items]
Net sales	7,366	6,456
Operating segments | Pratt & Whitney | Products
Segment Reporting Information [Line Items]
Net sales	4,032	3,957
Operating segments | Pratt & Whitney | Services
Segment Reporting Information [Line Items]
Net sales	3,333	2,499
Operating segments | Pratt & Whitney | Sales to the U.S. government
Segment Reporting Information [Line Items]
Net sales	1,585	1,558
Operating segments | Pratt & Whitney | Foreign military sales through the U.S. government
Segment Reporting Information [Line Items]
Net sales	379	310
Operating segments | Pratt & Whitney | Foreign government direct commercial sales
Segment Reporting Information [Line Items]
Net sales	148	158
Operating segments | Pratt & Whitney | Commercial aerospace and other commercial sales
Segment Reporting Information [Line Items]
Net sales	5,253	4,430
Operating segments | Pratt & Whitney | U.S.
Segment Reporting Information [Line Items]
Net sales	3,418	3,010
Operating segments | Pratt & Whitney | Europe
Segment Reporting Information [Line Items]
Net sales	1,839	1,670
Operating segments | Pratt & Whitney | Asia Pacific
Segment Reporting Information [Line Items]
Net sales	1,241	1,194
Operating segments | Pratt & Whitney | Middle East and North Africa
Segment Reporting Information [Line Items]
Net sales	175	138
Operating segments | Pratt & Whitney | Other regions
Segment Reporting Information [Line Items]
Net sales	692	444
Operating segments | Raytheon
Segment Reporting Information [Line Items]
Net sales	6,340	6,659
Operating segments | Raytheon | Fixed-price
Segment Reporting Information [Line Items]
Net sales	3,605	3,293
Operating segments | Raytheon | Cost-type
Segment Reporting Information [Line Items]
Net sales	2,695	3,337
Operating segments | Raytheon | Products
Segment Reporting Information [Line Items]
Net sales	5,406	5,467
Operating segments | Raytheon | Services
Segment Reporting Information [Line Items]
Net sales	894	1,163
Operating segments | Raytheon | Sales to the U.S. government
Segment Reporting Information [Line Items]
Net sales	4,435	4,957
Operating segments | Raytheon | Foreign military sales through the U.S. government
Segment Reporting Information [Line Items]
Net sales	976	858
Operating segments | Raytheon | Foreign government direct commercial sales
Segment Reporting Information [Line Items]
Net sales	876	740
Operating segments | Raytheon | Commercial aerospace and other commercial sales
Segment Reporting Information [Line Items]
Net sales	13	75
Operating segments | Raytheon | U.S.
Segment Reporting Information [Line Items]
Net sales	4,447	4,982
Operating segments | Raytheon | Europe
Segment Reporting Information [Line Items]
Net sales	843	547
Operating segments | Raytheon | Asia Pacific
Segment Reporting Information [Line Items]
Net sales	525	541
Operating segments | Raytheon | Middle East and North Africa
Segment Reporting Information [Line Items]
Net sales	434	530
Operating segments | Raytheon | Other regions
Segment Reporting Information [Line Items]
Net sales	51	30
Operating segments | Other
Segment Reporting Information [Line Items]
Net sales	(617)	(483)
Operating segments | Other | Products
Segment Reporting Information [Line Items]
Net sales	43	46
Operating segments | Other | Services
Segment Reporting Information [Line Items]
Net sales	11	4
Operating segments | Other | Sales to the U.S. government
Segment Reporting Information [Line Items]
Net sales	53	48
Operating segments | Other | Foreign military sales through the U.S. government
Segment Reporting Information [Line Items]
Net sales	0	0
Operating segments | Other | Foreign government direct commercial sales
Segment Reporting Information [Line Items]
Net sales	1	1
Operating segments | Other | Commercial aerospace and other commercial sales
Segment Reporting Information [Line Items]
Net sales	0	1
Operating segments | Other | U.S.
Segment Reporting Information [Line Items]
Net sales	53	48
Operating segments | Other | Europe
Segment Reporting Information [Line Items]
Net sales	1	1
Operating segments | Other | Asia Pacific
Segment Reporting Information [Line Items]
Net sales	0	1
Operating segments | Other | Middle East and North Africa
Segment Reporting Information [Line Items]
Net sales	0	0
Operating segments | Other | Other regions
Segment Reporting Information [Line Items]
Net sales	0	0
Inter-segment sales
Segment Reporting Information [Line Items]
Net sales	(617)	(483)
Inter-segment sales | Collins Aerospace
Segment Reporting Information [Line Items]
Net sales	(630)	(504)
Inter-segment sales | Pratt & Whitney
Segment Reporting Information [Line Items]
Net sales	(1)	0
Inter-segment sales | Raytheon
Segment Reporting Information [Line Items]
Net sales	(40)	(29)
Inter-segment sales | Other
Segment Reporting Information [Line Items]
Net sales	$ (671)	$ (533)