INFORMATION ON BUSINESS SEGMENTS - Income Statement Information For Each Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 27, 2022	Mar. 28, 2021
Net sales
Net sales	$ 14,964	$ 16,258
United States
Net sales
Net sales	10,957	11,779
Europe
Net sales
Net sales	1,490	1,692
Asia Pacific
Net sales
Net sales	1,266	1,596
Middle East
Net sales
Net sales	906	912
Other
Net sales
Net sales	345	279
U.S. Government
Net sales
Net sales	10,835	11,675
International
Net sales
Net sales	4,007	4,479
U.S. commercial and other
Net sales
Net sales	122	104
Fixed-price
Net sales
Net sales	9,254	9,903
Cost-reimbursable
Net sales
Net sales	5,710	6,355
Products
Net sales
Net sales	12,494	13,753
Services
Net sales
Net sales	2,470	2,505
Aeronautics
Net sales
Net sales	6,401	6,387
Aeronautics | United States
Net sales
Net sales	4,251	4,288
Aeronautics | Europe
Net sales
Net sales	1,023	854
Aeronautics | Asia Pacific
Net sales
Net sales	721	893
Aeronautics | Middle East
Net sales
Net sales	262	284
Aeronautics | Other
Net sales
Net sales	144	68
Aeronautics | U.S. Government
Net sales
Net sales	4,213	4,273
Aeronautics | International
Net sales
Net sales	2,150	2,099
Aeronautics | U.S. commercial and other
Net sales
Net sales	38	15
Aeronautics | Fixed-price
Net sales
Net sales	4,686	4,734
Aeronautics | Cost-reimbursable
Net sales
Net sales	1,715	1,653
Aeronautics | Products
Net sales
Net sales	5,417	5,479
Aeronautics | Services
Net sales
Net sales	984	908
MFC
Net sales
Net sales	2,452	2,749
MFC | United States
Net sales
Net sales	1,600	2,046
MFC | Europe
Net sales
Net sales	256	182
MFC | Asia Pacific
Net sales
Net sales	106	51
MFC | Middle East
Net sales
Net sales	465	458
MFC | Other
Net sales
Net sales	25	12
MFC | U.S. Government
Net sales
Net sales	1,595	2,041
MFC | International
Net sales
Net sales	852	703
MFC | U.S. commercial and other
Net sales
Net sales	5	5
MFC | Fixed-price
Net sales
Net sales	1,713	1,878
MFC | Cost-reimbursable
Net sales
Net sales	739	871
MFC | Products
Net sales
Net sales	2,173	2,410
MFC | Services
Net sales
Net sales	279	339
RMS
Net sales
Net sales	3,552	4,107
RMS | United States
Net sales
Net sales	2,581	2,887
RMS | Europe
Net sales
Net sales	187	201
RMS | Asia Pacific
Net sales
Net sales	432	650
RMS | Middle East
Net sales
Net sales	176	170
RMS | Other
Net sales
Net sales	176	199
RMS | U.S. Government
Net sales
Net sales	2,511	2,810
RMS | International
Net sales
Net sales	971	1,220
RMS | U.S. commercial and other
Net sales
Net sales	70	77
RMS | Fixed-price
Net sales
Net sales	2,218	2,677
RMS | Cost-reimbursable
Net sales
Net sales	1,334	1,430
RMS | Products
Net sales
Net sales	2,788	3,300
RMS | Services
Net sales
Net sales	764	807
Space
Net sales
Net sales	2,559	3,015
Space | United States
Net sales
Net sales	2,525	2,558
Space | Europe
Net sales
Net sales	24	455
Space | Asia Pacific
Net sales
Net sales	7	2
Space | Middle East
Net sales
Net sales	3	0
Space | Other
Net sales
Net sales	0	0
Space | U.S. Government
Net sales
Net sales	2,516	2,551
Space | International
Net sales
Net sales	34	457
Space | U.S. commercial and other
Net sales
Net sales	9	7
Space | Fixed-price
Net sales
Net sales	637	614
Space | Cost-reimbursable
Net sales
Net sales	1,922	2,401
Space | Products
Net sales
Net sales	2,116	2,564
Space | Services
Net sales
Net sales	$ 443	$ 451