Revenue - Revenue by Customer (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2022	Jul. 04, 2021	Jul. 03, 2022	Jul. 04, 2021
Revenue [Line Items]
Total revenue	$ 9,189	$ 9,220	$ 18,581	$ 18,609
U.S. Government - DoD
Revenue [Line Items]
Total revenue	5,307	5,276	10,598	10,417
U.S. Government - Non-DoD
Revenue [Line Items]
Total revenue	1,181	1,298	2,427	2,550
U.S. Government - Foreign Military Sales (FMS)
Revenue [Line Items]
Total revenue	134	127	290	303
Total U.S. government
Revenue [Line Items]
Total revenue	6,622	6,701	13,315	13,270
U.S. commercial
Revenue [Line Items]
Total revenue	1,202	1,061	2,407	2,042
Non-U.S. government
Revenue [Line Items]
Total revenue	863	936	1,771	1,989
Non-U.S. commercial
Revenue [Line Items]
Total revenue	502	522	1,088	1,308
Aerospace
Revenue [Line Items]
Total revenue	1,867	1,622	3,770	3,509
Aerospace \| U.S. Government - DoD
Revenue [Line Items]
Total revenue	80	72	160	130
Aerospace \| U.S. Government - Non-DoD
Revenue [Line Items]
Total revenue	0	0	0	0
Aerospace \| U.S. Government - Foreign Military Sales (FMS)
Revenue [Line Items]
Total revenue	49	18	82	37
Aerospace \| Total U.S. government
Revenue [Line Items]
Total revenue	129	90	242	167
Aerospace \| U.S. commercial
Revenue [Line Items]
Total revenue	1,088	982	2,198	1,839
Aerospace \| Non-U.S. government
Revenue [Line Items]
Total revenue	179	50	299	240
Aerospace \| Non-U.S. commercial
Revenue [Line Items]
Total revenue	471	500	1,031	1,263
Marine Systems
Revenue [Line Items]
Total revenue	2,651	2,536	5,302	5,019
Marine Systems \| U.S. Government - DoD
Revenue [Line Items]
Total revenue	2,620	2,492	5,225	4,912
Marine Systems \| U.S. Government - Non-DoD
Revenue [Line Items]
Total revenue	0	0	1	4
Marine Systems \| U.S. Government - Foreign Military Sales (FMS)
Revenue [Line Items]
Total revenue	29	41	73	97
Marine Systems \| Total U.S. government
Revenue [Line Items]
Total revenue	2,649	2,533	5,299	5,013
Marine Systems \| U.S. commercial
Revenue [Line Items]
Total revenue	1	1	1	2
Marine Systems \| Non-U.S. government
Revenue [Line Items]
Total revenue	1	0	2	2
Marine Systems \| Non-U.S. commercial
Revenue [Line Items]
Total revenue	0	2	0	2
Combat Systems
Revenue [Line Items]
Total revenue	1,666	1,899	3,341	3,719
Combat Systems \| U.S. Government - DoD
Revenue [Line Items]
Total revenue	940	954	1,795	1,870
Combat Systems \| U.S. Government - Non-DoD
Revenue [Line Items]
Total revenue	3	3	5	5
Combat Systems \| U.S. Government - Foreign Military Sales (FMS)
Revenue [Line Items]
Total revenue	50	62	119	149
Combat Systems \| Total U.S. government
Revenue [Line Items]
Total revenue	993	1,019	1,919	2,024
Combat Systems \| U.S. commercial
Revenue [Line Items]
Total revenue	60	42	105	108
Combat Systems \| Non-U.S. government
Revenue [Line Items]
Total revenue	590	822	1,275	1,554
Combat Systems \| Non-U.S. commercial
Revenue [Line Items]
Total revenue	23	16	42	33
Technologies
Revenue [Line Items]
Total revenue	3,005	3,163	6,168	6,362
Technologies \| U.S. Government - DoD
Revenue [Line Items]
Total revenue	1,667	1,758	3,418	3,505
Technologies \| U.S. Government - Non-DoD
Revenue [Line Items]
Total revenue	1,178	1,295	2,421	2,541
Technologies \| U.S. Government - Foreign Military Sales (FMS)
Revenue [Line Items]
Total revenue	6	6	16	20
Technologies \| Total U.S. government
Revenue [Line Items]
Total revenue	2,851	3,059	5,855	6,066
Technologies \| U.S. commercial
Revenue [Line Items]
Total revenue	53	36	103	93
Technologies \| Non-U.S. government
Revenue [Line Items]
Total revenue	93	64	195	193
Technologies \| Non-U.S. commercial
Revenue [Line Items]
Total revenue	$ 8	$ 4	$ 15	$ 10