INFORMATION ON BUSINESS SEGMENTS - Income Statement Information For Each Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 26, 2022	Jun. 27, 2021	Jun. 26, 2022	Jun. 27, 2021
Net sales
Net sales	$ 15,446	$ 17,029	$ 30,410	$ 33,287
United States
Net sales
Net sales	11,597	12,416	22,554	24,195
Europe
Net sales
Net sales	1,305	1,843	2,795	3,535
Asia Pacific
Net sales
Net sales	1,371	1,506	2,637	3,102
Middle East
Net sales
Net sales	843	956	1,749	1,868
Other
Net sales
Net sales	330	308	675	587
U.S. Government
Net sales
Net sales	11,458	12,325	22,293	24,000
International
Net sales
Net sales	3,849	4,613	7,856	9,092
U.S. commercial and other
Net sales
Net sales	139	91	261	195
Fixed-price
Net sales
Net sales	9,201	10,358	18,455	20,261
Cost-reimbursable
Net sales
Net sales	6,245	6,671	11,955	13,026
Products
Net sales
Net sales	12,761	14,258	25,255	28,011
Services
Net sales
Net sales	2,685	2,771	5,155	5,276
Aeronautics
Net sales
Net sales	5,862	6,666	12,263	13,053
Aeronautics | United States
Net sales
Net sales	3,994	4,383	8,245	8,671
Aeronautics | Europe
Net sales
Net sales	845	944	1,868	1,798
Aeronautics | Asia Pacific
Net sales
Net sales	705	914	1,426	1,807
Aeronautics | Middle East
Net sales
Net sales	222	311	484	595
Aeronautics | Other
Net sales
Net sales	96	114	240	182
Aeronautics | U.S. Government
Net sales
Net sales	3,963	4,367	8,176	8,640
Aeronautics | International
Net sales
Net sales	1,868	2,283	4,018	4,382
Aeronautics | U.S. commercial and other
Net sales
Net sales	31	16	69	31
Aeronautics | Fixed-price
Net sales
Net sales	3,916	4,920	8,602	9,654
Aeronautics | Cost-reimbursable
Net sales
Net sales	1,946	1,746	3,661	3,399
Aeronautics | Products
Net sales
Net sales	4,804	5,583	10,221	11,062
Aeronautics | Services
Net sales
Net sales	1,058	1,083	2,042	1,991
MFC
Net sales
Net sales	2,747	2,944	5,199	5,693
MFC | United States
Net sales
Net sales	1,924	2,178	3,524	4,224
MFC | Europe
Net sales
Net sales	262	232	518	414
MFC | Asia Pacific
Net sales
Net sales	107	56	213	107
MFC | Middle East
Net sales
Net sales	417	467	882	925
MFC | Other
Net sales
Net sales	37	11	62	23
MFC | U.S. Government
Net sales
Net sales	1,924	2,176	3,519	4,217
MFC | International
Net sales
Net sales	823	766	1,675	1,469
MFC | U.S. commercial and other
Net sales
Net sales	0	2	5	7
MFC | Fixed-price
Net sales
Net sales	1,943	1,991	3,656	3,869
MFC | Cost-reimbursable
Net sales
Net sales	804	953	1,543	1,824
MFC | Products
Net sales
Net sales	2,444	2,571	4,617	4,981
MFC | Services
Net sales
Net sales	303	373	582	712
RMS
Net sales
Net sales	4,012	4,242	7,564	8,349
RMS | United States
Net sales
Net sales	2,883	3,125	5,464	6,012
RMS | Europe
Net sales
Net sales	178	223	365	424
RMS | Asia Pacific
Net sales
Net sales	553	534	985	1,184
RMS | Middle East
Net sales
Net sales	201	177	377	347
RMS | Other
Net sales
Net sales	197	183	373	382
RMS | U.S. Government
Net sales
Net sales	2,785	3,063	5,296	5,873
RMS | International
Net sales
Net sales	1,129	1,117	2,100	2,337
RMS | U.S. commercial and other
Net sales
Net sales	98	62	168	139
RMS | Fixed-price
Net sales
Net sales	2,589	2,802	4,807	5,479
RMS | Cost-reimbursable
Net sales
Net sales	1,423	1,440	2,757	2,870
RMS | Products
Net sales
Net sales	3,150	3,369	5,938	6,669
RMS | Services
Net sales
Net sales	862	873	1,626	1,680
Space
Net sales
Net sales	2,825	3,177	5,384	6,192
Space | United States
Net sales
Net sales	2,796	2,730	5,321	5,288
Space | Europe
Net sales
Net sales	20	444	44	899
Space | Asia Pacific
Net sales
Net sales	6	2	13	4
Space | Middle East
Net sales
Net sales	3	1	6	1
Space | Other
Net sales
Net sales	0	0	0	0
Space | U.S. Government
Net sales
Net sales	2,786	2,719	5,302	5,270
Space | International
Net sales
Net sales	29	447	63	904
Space | U.S. commercial and other
Net sales
Net sales	10	11	19	18
Space | Fixed-price
Net sales
Net sales	753	645	1,390	1,259
Space | Cost-reimbursable
Net sales
Net sales	2,072	2,532	3,994	4,933
Space | Products
Net sales
Net sales	2,363	2,735	4,479	5,299
Space | Services
Net sales
Net sales	$ 462	$ 442	$ 905	$ 893