Segment Financial Data (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Revenues	$ 13,464	$ 16,951	$ 48,993	$ 48,981
Revenues	13,464	16,951	48,993	48,981
Product [Member]
Segment Reporting Information [Line Items]
Revenues	8,615	12,756	34,813	36,876
Revenues	8,615	12,756	34,813	36,876
Service [Member]
Segment Reporting Information [Line Items]
Revenues	4,849	4,195	14,180	12,105
Revenues	4,849	4,195	14,180	12,105
U.S. Government Sales Excluding Foreign Military Sales Member
Segment Reporting Information [Line Items]
Revenues	7,678	7,555	23,193	22,452
Foreign Military Sales Through the U.S. Government Member
Segment Reporting Information [Line Items]
Revenues	1,317	1,275	3,820	3,632
Foreign Government Direct Commercial Sales Member
Segment Reporting Information [Line Items]
Revenues	1,020	1,064	3,113	3,118
Commercial Aerospace and Other Commercial Member
Segment Reporting Information [Line Items]
Revenues	3,449	7,057	18,867	19,779
UNITED STATES
Segment Reporting Information [Line Items]
Revenues	11,155	10,422	32,930	30,337
Europe [Member]
Segment Reporting Information [Line Items]
Revenues	3,514	2,663	9,790	7,913
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenues	2,414	2,160	6,573	5,825
Middle East and North Africa Member
Segment Reporting Information [Line Items]
Revenues	824	978	2,438	2,676
Other [Member]
Segment Reporting Information [Line Items]
Revenues	958	728	2,663	2,230
Other [Member] \| Powder Metal Matter
Segment Reporting Information [Line Items]
Revenues	(5,401)	0	(5,401)	0
Collins Aerospace [Member]
Segment Reporting Information [Line Items]
Revenues	6,099	5,258	17,682	15,559
Pratt & Whitney [Member]
Segment Reporting Information [Line Items]
Revenues	926	5,378	11,856	14,876
Raytheon
Segment Reporting Information [Line Items]
Revenues	6,442	6,271	19,370	18,413
Other Segments
Segment Reporting Information [Line Items]
Revenues	(3)	44	85	133
Operating Segments
Segment Reporting Information [Line Items]
Revenues	14,027	17,406	50,454	50,214
Operating Segments \| Collins Aerospace [Member]
Segment Reporting Information [Line Items]
Revenues	6,629	5,718	19,133	16,821
Revenues	6,629	5,718	19,133	16,821
Operating Segments \| Collins Aerospace [Member] \| Product [Member]
Segment Reporting Information [Line Items]
Revenues	4,761	4,194	13,813	12,309
Operating Segments \| Collins Aerospace [Member] \| Service [Member]
Segment Reporting Information [Line Items]
Revenues	1,338	1,064	3,869	3,250
Operating Segments \| Collins Aerospace [Member] \| U.S. Government Sales Excluding Foreign Military Sales Member
Segment Reporting Information [Line Items]
Revenues	1,502	1,610	4,670	4,785
Operating Segments \| Collins Aerospace [Member] \| Foreign Military Sales Through the U.S. Government Member
Segment Reporting Information [Line Items]
Revenues	76	85	226	271
Operating Segments \| Collins Aerospace [Member] \| Foreign Government Direct Commercial Sales Member
Segment Reporting Information [Line Items]
Revenues	257	227	793	784
Operating Segments \| Collins Aerospace [Member] \| Commercial Aerospace and Other Commercial Member
Segment Reporting Information [Line Items]
Revenues	4,264	3,336	11,993	9,719
Operating Segments \| Collins Aerospace [Member] \| UNITED STATES
Segment Reporting Information [Line Items]
Revenues	3,323	2,988	9,657	8,775
Operating Segments \| Collins Aerospace [Member] \| Europe [Member]
Segment Reporting Information [Line Items]
Revenues	1,580	1,251	4,580	3,875
Operating Segments \| Collins Aerospace [Member] \| Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenues	674	563	1,864	1,594
Operating Segments \| Collins Aerospace [Member] \| Middle East and North Africa Member
Segment Reporting Information [Line Items]
Revenues	187	143	531	397
Operating Segments \| Collins Aerospace [Member] \| Other [Member]
Segment Reporting Information [Line Items]
Revenues	335	313	1,050	918
Operating Segments \| Collins Aerospace [Member] \| Other [Member] \| Powder Metal Matter
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Operating Segments \| Pratt & Whitney [Member]
Segment Reporting Information [Line Items]
Revenues	926	5,380	11,857	14,878
Revenues	926	5,380	11,857	14,878
Operating Segments \| Pratt & Whitney [Member] \| Product [Member]
Segment Reporting Information [Line Items]
Revenues	(1,486)	3,183	4,765	8,798
Operating Segments \| Pratt & Whitney [Member] \| Service [Member]
Segment Reporting Information [Line Items]
Revenues	2,412	2,195	7,091	6,078
Operating Segments \| Pratt & Whitney [Member] \| U.S. Government Sales Excluding Foreign Military Sales Member
Segment Reporting Information [Line Items]
Revenues	1,239	1,324	3,774	3,915
Operating Segments \| Pratt & Whitney [Member] \| Foreign Military Sales Through the U.S. Government Member
Segment Reporting Information [Line Items]
Revenues	474	295	1,158	796
Operating Segments \| Pratt & Whitney [Member] \| Foreign Government Direct Commercial Sales Member
Segment Reporting Information [Line Items]
Revenues	127	116	347	335
Operating Segments \| Pratt & Whitney [Member] \| Commercial Aerospace and Other Commercial Member
Segment Reporting Information [Line Items]
Revenues	(914)	3,643	6,577	9,830
Operating Segments \| Pratt & Whitney [Member] \| UNITED STATES
Segment Reporting Information [Line Items]
Revenues	2,849	2,756	8,327	7,630
Operating Segments \| Pratt & Whitney [Member] \| Europe [Member]
Segment Reporting Information [Line Items]
Revenues	1,533	1,074	3,998	3,010
Operating Segments \| Pratt & Whitney [Member] \| Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenues	1,191	1,028	3,068	2,726
Operating Segments \| Pratt & Whitney [Member] \| Middle East and North Africa Member
Segment Reporting Information [Line Items]
Revenues	168	160	382	350
Operating Segments \| Pratt & Whitney [Member] \| Other [Member]
Segment Reporting Information [Line Items]
Revenues	586	360	1,482	1,160
Operating Segments \| Pratt & Whitney [Member] \| Other [Member] \| Powder Metal Matter
Segment Reporting Information [Line Items]
Revenues	(5,401)	0	(5,401)	0
Operating Segments \| Raytheon
Segment Reporting Information [Line Items]
Revenues	6,472	6,308	19,464	18,515
Revenues	6,472	6,308	19,464	18,515
Operating Segments \| Raytheon \| Fixed-price Contract
Segment Reporting Information [Line Items]
Revenues	2,997	3,180	9,639	9,369
Operating Segments \| Raytheon \| Cost-type Contract
Segment Reporting Information [Line Items]
Revenues	3,445	3,091	9,731	9,044
Operating Segments \| Raytheon \| Product [Member]
Segment Reporting Information [Line Items]
Revenues	5,339	5,336	16,149	15,640
Operating Segments \| Raytheon \| Service [Member]
Segment Reporting Information [Line Items]
Revenues	1,103	935	3,221	2,773
Operating Segments \| Raytheon \| U.S. Government Sales Excluding Foreign Military Sales Member
Segment Reporting Information [Line Items]
Revenues	4,943	4,579	14,670	13,624
Operating Segments \| Raytheon \| Foreign Military Sales Through the U.S. Government Member
Segment Reporting Information [Line Items]
Revenues	767	895	2,436	2,565
Operating Segments \| Raytheon \| Foreign Government Direct Commercial Sales Member
Segment Reporting Information [Line Items]
Revenues	636	720	1,970	1,996
Operating Segments \| Raytheon \| Commercial Aerospace and Other Commercial Member
Segment Reporting Information [Line Items]
Revenues	96	77	294	228
Operating Segments \| Raytheon \| UNITED STATES
Segment Reporting Information [Line Items]
Revenues	4,987	4,635	14,865	13,802
Operating Segments \| Raytheon \| Europe [Member]
Segment Reporting Information [Line Items]
Revenues	400	337	1,209	1,026
Operating Segments \| Raytheon \| Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenues	549	569	1,640	1,505
Operating Segments \| Raytheon \| Middle East and North Africa Member
Segment Reporting Information [Line Items]
Revenues	469	675	1,525	1,929
Operating Segments \| Raytheon \| Other [Member]
Segment Reporting Information [Line Items]
Revenues	37	55	131	151
Operating Segments \| Raytheon \| Other [Member] \| Powder Metal Matter
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Operating Segments \| Other Segments
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Operating Segments \| Other Segments \| Product [Member]
Segment Reporting Information [Line Items]
Revenues	1	43	86	129
Operating Segments \| Other Segments \| Service [Member]
Segment Reporting Information [Line Items]
Revenues	(4)	1	(1)	4
Operating Segments \| Other Segments \| U.S. Government Sales Excluding Foreign Military Sales Member
Segment Reporting Information [Line Items]
Revenues	(6)	42	79	128
Operating Segments \| Other Segments \| Foreign Military Sales Through the U.S. Government Member
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Operating Segments \| Other Segments \| Foreign Government Direct Commercial Sales Member
Segment Reporting Information [Line Items]
Revenues	0	1	3	3
Operating Segments \| Other Segments \| Commercial Aerospace and Other Commercial Member
Segment Reporting Information [Line Items]
Revenues	3	1	3	2
Operating Segments \| Other Segments \| UNITED STATES
Segment Reporting Information [Line Items]
Revenues	(4)	43	81	130
Operating Segments \| Other Segments \| Europe [Member]
Segment Reporting Information [Line Items]
Revenues	1	1	3	2
Operating Segments \| Other Segments \| Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenues	0	0	1	0
Operating Segments \| Other Segments \| Middle East and North Africa Member
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Operating Segments \| Other Segments \| Other [Member]
Segment Reporting Information [Line Items]
Revenues	0	0	0	1
Operating Segments \| Other Segments \| Other [Member] \| Powder Metal Matter
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	(563)	(455)	(1,461)	(1,233)
Revenues	(563)	(455)	(1,461)	(1,233)
Intersegment Eliminations \| Collins Aerospace [Member]
Segment Reporting Information [Line Items]
Revenues	530	460	1,451	1,262
Intersegment Eliminations \| Pratt & Whitney [Member]
Segment Reporting Information [Line Items]
Revenues	0	2	1	2
Intersegment Eliminations \| Raytheon
Segment Reporting Information [Line Items]
Revenues	30	37	94	102
Intersegment Eliminations \| Other Segments
Segment Reporting Information [Line Items]
Revenues	$ (560)	$ (499)	$ (1,546)	$ (1,366)