INFORMATION ON BUSINESS SEGMENTS - Income Statement Information For Each Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2025	Mar. 31, 2024
Sales
Net sales	$ 17,963	$ 17,195
United States
Sales
Net sales	13,041	12,989
Europe
Sales
Net sales	1,968	1,743
Asia Pacific
Sales
Net sales	1,744	1,409
Middle East
Sales
Net sales	704	739
Other
Sales
Net sales	506	315
U.S. Government
Sales
Net sales		12,835
International
Sales
Net sales	4,922	4,206
U.S. commercial and other
Sales
Net sales	92	154
U S Government
Sales
Net sales	12,949
Fixed-price
Sales
Net sales	10,755	9,957
Cost-reimbursable
Sales
Net sales	7,208	7,238
Products
Sales
Net sales	14,936	14,196
Services
Sales
Net sales	3,027	2,999
Aeronautics
Sales
Net sales	7,057	6,845
Aeronautics \| United States
Sales
Net sales	4,652	4,693
Aeronautics \| Europe
Sales
Net sales	1,247	1,211
Aeronautics \| Asia Pacific
Sales
Net sales	840	636
Aeronautics \| Middle East
Sales
Net sales	148	203
Aeronautics \| Other
Sales
Net sales	170	102
Aeronautics \| U.S. Government
Sales
Net sales		4,666
Aeronautics \| International
Sales
Net sales	2,405	2,152
Aeronautics \| U.S. commercial and other
Sales
Net sales	10	27
Aeronautics \| U S Government
Sales
Net sales	4,642
Aeronautics \| Fixed-price
Sales
Net sales	4,713	4,584
Aeronautics \| Cost-reimbursable
Sales
Net sales	2,344	2,261
Aeronautics \| Products
Sales
Net sales	5,746	5,592
Aeronautics \| Services
Sales
Net sales	1,311	1,253
MFC
Sales
Net sales	3,373	2,993
MFC \| United States
Sales
Net sales	2,395	2,169
MFC \| Europe
Sales
Net sales	395	245
MFC \| Asia Pacific
Sales
Net sales	224	187
MFC \| Middle East
Sales
Net sales	342	370
MFC \| Other
Sales
Net sales	17	22
MFC \| U.S. Government
Sales
Net sales		2,167
MFC \| International
Sales
Net sales	978	824
MFC \| U.S. commercial and other
Sales
Net sales	4	2
MFC \| U S Government
Sales
Net sales	2,391
MFC \| Fixed-price
Sales
Net sales	2,440	1,996
MFC \| Cost-reimbursable
Sales
Net sales	933	997
MFC \| Products
Sales
Net sales	3,017	2,664
MFC \| Services
Sales
Net sales	356	329
RMS
Sales
Net sales	4,328	4,088
RMS \| United States
Sales
Net sales	2,860	2,926
RMS \| Europe
Sales
Net sales	304	269
RMS \| Asia Pacific
Sales
Net sales	633	540
RMS \| Middle East
Sales
Net sales	212	162
RMS \| Other
Sales
Net sales	319	191
RMS \| U.S. Government
Sales
Net sales		2,840
RMS \| International
Sales
Net sales	1,468	1,162
RMS \| U.S. commercial and other
Sales
Net sales	73	86
RMS \| U S Government
Sales
Net sales	2,787
RMS \| Fixed-price
Sales
Net sales	2,660	2,477
RMS \| Cost-reimbursable
Sales
Net sales	1,668	1,611
RMS \| Products
Sales
Net sales	3,496	3,241
RMS \| Services
Sales
Net sales	832	847
Space
Sales
Net sales	3,205	3,269
Space \| United States
Sales
Net sales	3,134	3,201
Space \| Europe
Sales
Net sales	22	18
Space \| Asia Pacific
Sales
Net sales	47	46
Space \| Middle East
Sales
Net sales	2	4
Space \| Other
Sales
Net sales	0	0
Space \| U.S. Government
Sales
Net sales		3,162
Space \| International
Sales
Net sales	71	68
Space \| U.S. commercial and other
Sales
Net sales	5	39
Space \| U S Government
Sales
Net sales	3,129
Space \| Fixed-price
Sales
Net sales	942	900
Space \| Cost-reimbursable
Sales
Net sales	2,263	2,369
Space \| Products
Sales
Net sales	2,677	2,699
Space \| Services
Sales
Net sales	$ 528	$ 570