Segment Financial Data (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Revenues	$ 19,305	$ 17,214
Product [Member]
Segment Reporting Information [Line Items]
Revenues	14,303	12,787
Service [Member]
Segment Reporting Information [Line Items]
Revenues	5,002	4,427
U.S. Government Sales Excluding Foreign Military Sales Member
Segment Reporting Information [Line Items]
Revenues	8,127	7,557
Foreign Military Sales Through the U.S. Government Member
Segment Reporting Information [Line Items]
Revenues	1,249	1,262
Foreign Government Direct Commercial Sales Member
Segment Reporting Information [Line Items]
Revenues	1,208	1,004
Commercial Aerospace and Other Commercial Member
Segment Reporting Information [Line Items]
Revenues	8,721	7,391
UNITED STATES
Segment Reporting Information [Line Items]
Revenues	11,361	10,548
Europe [Member]
Segment Reporting Information [Line Items]
Revenues	3,833	2,990
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenues	2,427	2,050
Middle East and North Africa Member
Segment Reporting Information [Line Items]
Revenues	849	763
Other [Member]
Segment Reporting Information [Line Items]
Revenues	835	863
Collins Aerospace [Member]
Segment Reporting Information [Line Items]
Revenues	6,169	5,679
Pratt & Whitney [Member]
Segment Reporting Information [Line Items]
Revenues	6,456	5,229
Raytheon
Segment Reporting Information [Line Items]
Revenues	6,630	6,261
Other Segments
Segment Reporting Information [Line Items]
Revenues	50	45
Operating Segments | Collins Aerospace [Member]
Segment Reporting Information [Line Items]
Revenues	6,673	6,120
Operating Segments | Collins Aerospace [Member] | Product [Member]
Segment Reporting Information [Line Items]
Revenues	4,833	4,450
Operating Segments | Collins Aerospace [Member] | Service [Member]
Segment Reporting Information [Line Items]
Revenues	1,336	1,229
Operating Segments | Collins Aerospace [Member] | U.S. Government Sales Excluding Foreign Military Sales Member
Segment Reporting Information [Line Items]
Revenues	1,564	1,594
Operating Segments | Collins Aerospace [Member] | Foreign Military Sales Through the U.S. Government Member
Segment Reporting Information [Line Items]
Revenues	81	83
Operating Segments | Collins Aerospace [Member] | Foreign Government Direct Commercial Sales Member
Segment Reporting Information [Line Items]
Revenues	309	260
Operating Segments | Collins Aerospace [Member] | Commercial Aerospace and Other Commercial Member
Segment Reporting Information [Line Items]
Revenues	4,215	3,742
Operating Segments | Collins Aerospace [Member] | UNITED STATES
Segment Reporting Information [Line Items]
Revenues	3,321	3,097
Operating Segments | Collins Aerospace [Member] | Europe [Member]
Segment Reporting Information [Line Items]
Revenues	1,615	1,479
Operating Segments | Collins Aerospace [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenues	691	591
Operating Segments | Collins Aerospace [Member] | Middle East and North Africa Member
Segment Reporting Information [Line Items]
Revenues	181	163
Operating Segments | Collins Aerospace [Member] | Other [Member]
Segment Reporting Information [Line Items]
Revenues	361	349
Operating Segments | Pratt & Whitney [Member]
Segment Reporting Information [Line Items]
Revenues	6,456	5,230
Operating Segments | Pratt & Whitney [Member] | Product [Member]
Segment Reporting Information [Line Items]
Revenues	3,957	3,052
Operating Segments | Pratt & Whitney [Member] | Service [Member]
Segment Reporting Information [Line Items]
Revenues	2,499	2,177
Operating Segments | Pratt & Whitney [Member] | U.S. Government Sales Excluding Foreign Military Sales Member
Segment Reporting Information [Line Items]
Revenues	1,558	1,222
Operating Segments | Pratt & Whitney [Member] | Foreign Military Sales Through the U.S. Government Member
Segment Reporting Information [Line Items]
Revenues	310	332
Operating Segments | Pratt & Whitney [Member] | Foreign Government Direct Commercial Sales Member
Segment Reporting Information [Line Items]
Revenues	158	118
Operating Segments | Pratt & Whitney [Member] | Commercial Aerospace and Other Commercial Member
Segment Reporting Information [Line Items]
Revenues	4,430	3,557
Operating Segments | Pratt & Whitney [Member] | UNITED STATES
Segment Reporting Information [Line Items]
Revenues	3,010	2,631
Operating Segments | Pratt & Whitney [Member] | Europe [Member]
Segment Reporting Information [Line Items]
Revenues	1,670	1,120
Operating Segments | Pratt & Whitney [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenues	1,194	905
Operating Segments | Pratt & Whitney [Member] | Middle East and North Africa Member
Segment Reporting Information [Line Items]
Revenues	138	110
Operating Segments | Pratt & Whitney [Member] | Other [Member]
Segment Reporting Information [Line Items]
Revenues	444	463
Operating Segments | Raytheon
Segment Reporting Information [Line Items]
Revenues	6,659	6,292
Operating Segments | Raytheon | Fixed-price Contract
Segment Reporting Information [Line Items]
Revenues	3,293	3,237
Operating Segments | Raytheon | Cost-type Contract
Segment Reporting Information [Line Items]
Revenues	3,337	3,024
Operating Segments | Raytheon | Product [Member]
Segment Reporting Information [Line Items]
Revenues	5,467	5,242
Operating Segments | Raytheon | Service [Member]
Segment Reporting Information [Line Items]
Revenues	1,163	1,019
Operating Segments | Raytheon | U.S. Government Sales Excluding Foreign Military Sales Member
Segment Reporting Information [Line Items]
Revenues	4,957	4,698
Operating Segments | Raytheon | Foreign Military Sales Through the U.S. Government Member
Segment Reporting Information [Line Items]
Revenues	858	847
Operating Segments | Raytheon | Foreign Government Direct Commercial Sales Member
Segment Reporting Information [Line Items]
Revenues	740	625
Operating Segments | Raytheon | Commercial Aerospace and Other Commercial Member
Segment Reporting Information [Line Items]
Revenues	75	91
Operating Segments | Raytheon | UNITED STATES
Segment Reporting Information [Line Items]
Revenues	4,982	4,776
Operating Segments | Raytheon | Europe [Member]
Segment Reporting Information [Line Items]
Revenues	547	390
Operating Segments | Raytheon | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenues	541	554
Operating Segments | Raytheon | Middle East and North Africa Member
Segment Reporting Information [Line Items]
Revenues	530	490
Operating Segments | Raytheon | Other [Member]
Segment Reporting Information [Line Items]
Revenues	30	51
Operating Segments | Other Segments
Segment Reporting Information [Line Items]
Revenues	0	0
Operating Segments | Other Segments | Product [Member]
Segment Reporting Information [Line Items]
Revenues	46	43
Operating Segments | Other Segments | Service [Member]
Segment Reporting Information [Line Items]
Revenues	4	2
Operating Segments | Other Segments | U.S. Government Sales Excluding Foreign Military Sales Member
Segment Reporting Information [Line Items]
Revenues	48	43
Operating Segments | Other Segments | Foreign Military Sales Through the U.S. Government Member
Segment Reporting Information [Line Items]
Revenues	0	0
Operating Segments | Other Segments | Foreign Government Direct Commercial Sales Member
Segment Reporting Information [Line Items]
Revenues	1	1
Operating Segments | Other Segments | Commercial Aerospace and Other Commercial Member
Segment Reporting Information [Line Items]
Revenues	1	1
Operating Segments | Other Segments | UNITED STATES
Segment Reporting Information [Line Items]
Revenues	48	44
Operating Segments | Other Segments | Europe [Member]
Segment Reporting Information [Line Items]
Revenues	1	1
Operating Segments | Other Segments | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenues	1	0
Operating Segments | Other Segments | Middle East and North Africa Member
Segment Reporting Information [Line Items]
Revenues	0	0
Operating Segments | Other Segments | Other [Member]
Segment Reporting Information [Line Items]
Revenues	0	0
Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	(483)	(428)
Intersegment Eliminations | Collins Aerospace [Member]
Segment Reporting Information [Line Items]
Revenues	504	441
Intersegment Eliminations | Pratt & Whitney [Member]
Segment Reporting Information [Line Items]
Revenues	0	1
Intersegment Eliminations | Raytheon
Segment Reporting Information [Line Items]
Revenues	29	31
Intersegment Eliminations | Other Segments
Segment Reporting Information [Line Items]
Revenues	$ (533)	$ (473)