Revenue - Revenue by Customer (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2023	Jul. 03, 2022	Jul. 02, 2023	Jul. 03, 2022
Revenue [Line Items]
Total revenue	$ 10,152	$ 9,189	$ 20,033	$ 18,581
U.S. Government - DoD
Revenue [Line Items]
Total revenue	5,891	5,307	11,788	10,598
U.S. Government - Non-DoD
Revenue [Line Items]
Total revenue	1,181	1,181	2,376	2,427
U.S. Government - Foreign Military Sales (FMS)
Revenue [Line Items]
Total revenue	219	134	420	290
Total U.S. government
Revenue [Line Items]
Total revenue	7,291	6,622	14,584	13,315
U.S. commercial
Revenue [Line Items]
Total revenue	1,089	1,202	2,392	2,407
Non-U.S. government
Revenue [Line Items]
Total revenue	967	863	1,795	1,771
Non-U.S. commercial
Revenue [Line Items]
Total revenue	805	502	1,262	1,088
Aerospace
Revenue [Line Items]
Total revenue	1,953	1,867	3,845	3,770
Aerospace | U.S. Government - DoD
Revenue [Line Items]
Total revenue	54	80	195	160
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	21	49	39	82
Aerospace | Total U.S. government
Revenue [Line Items]
Total revenue	75	129	234	242
Aerospace | U.S. commercial
Revenue [Line Items]
Total revenue	985	1,088	2,183	2,198
Aerospace | Non-U.S. government
Revenue [Line Items]
Total revenue	142	179	250	299
Aerospace | Non-U.S. commercial
Revenue [Line Items]
Total revenue	751	471	1,178	1,031
Marine Systems
Revenue [Line Items]
Total revenue	3,059	2,651	6,051	5,302
Marine Systems | U.S. Government - DoD
Revenue [Line Items]
Total revenue	3,029	2,620	5,978	5,225
Marine Systems | U.S. Government - Non-DoD
Revenue [Line Items]
Total revenue	0	0	1	1
Marine Systems | U.S. Government - Foreign Military Sales (FMS)
Revenue [Line Items]
Total revenue	29	29	70	73
Marine Systems | Total U.S. government
Revenue [Line Items]
Total revenue	3,058	2,649	6,049	5,299
Marine Systems | U.S. commercial
Revenue [Line Items]
Total revenue	1	1	1	1
Marine Systems | Non-U.S. government
Revenue [Line Items]
Total revenue	0	1	1	2
Marine Systems | Non-U.S. commercial
Revenue [Line Items]
Total revenue	0	0	0	0
Combat Systems
Revenue [Line Items]
Total revenue	1,924	1,666	3,680	3,341
Combat Systems | U.S. Government - DoD
Revenue [Line Items]
Total revenue	941	940	1,875	1,795
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	159	50	292	119
Combat Systems | Total U.S. government
Revenue [Line Items]
Total revenue	1,103	993	2,172	1,919
Combat Systems | U.S. commercial
Revenue [Line Items]
Total revenue	55	60	106	105
Combat Systems | Non-U.S. government
Revenue [Line Items]
Total revenue	733	590	1,352	1,275
Combat Systems | Non-U.S. commercial
Revenue [Line Items]
Total revenue	33	23	50	42
Technologies
Revenue [Line Items]
Total revenue	3,216	3,005	6,457	6,168
Technologies | U.S. Government - DoD
Revenue [Line Items]
Total revenue	1,867	1,667	3,740	3,418
Technologies | U.S. Government - Non-DoD
Revenue [Line Items]
Total revenue	1,178	1,178	2,370	2,421
Technologies | U.S. Government - Foreign Military Sales (FMS)
Revenue [Line Items]
Total revenue	10	6	19	16
Technologies | Total U.S. government
Revenue [Line Items]
Total revenue	3,055	2,851	6,129	5,855
Technologies | U.S. commercial
Revenue [Line Items]
Total revenue	48	53	102	103
Technologies | Non-U.S. government
Revenue [Line Items]
Total revenue	92	93	192	195
Technologies | Non-U.S. commercial
Revenue [Line Items]
Total revenue	$ 21	$ 8	$ 34	$ 15