BUSINESS SEGMENTS - Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2022	Dec. 31, 2021	Jan. 01, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 17,062	$ 17,814	$ 18,194
United States
Disaggregation of Revenue [Line Items]
Revenue	15,373	16,234	16,998
International
Disaggregation of Revenue [Line Items]
Revenue	1,689	1,580	1,196
Integrated Mission Systems | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenue	6,916	7,042	6,793
Integrated Mission Systems | Transferred over Time | United States
Disaggregation of Revenue [Line Items]
Revenue	5,096	5,102	5,347
Integrated Mission Systems | Transferred over Time | International
Disaggregation of Revenue [Line Items]
Revenue	1,759	1,879	1,396
Integrated Mission Systems | Transferred over Time | Fixed-price
Disaggregation of Revenue [Line Items]
Revenue	5,161	5,316	5,035
Integrated Mission Systems | Transferred over Time | Cost-reimbursable
Disaggregation of Revenue [Line Items]
Revenue	1,694	1,665	1,708
Integrated Mission Systems | Transferred over Time | Prime contractor
Disaggregation of Revenue [Line Items]
Revenue	4,488	4,738	4,470
Integrated Mission Systems | Transferred over Time | Subcontractor
Disaggregation of Revenue [Line Items]
Revenue	2,367	2,243	2,273
Integrated Mission Systems | Intersegment | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenue	61	61	50
Space & Airborne Systems | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenue	6,060	5,965	5,823
Space & Airborne Systems | Transferred over Time | United States
Disaggregation of Revenue [Line Items]
Revenue	5,323	5,250	5,022
Space & Airborne Systems | Transferred over Time | International
Disaggregation of Revenue [Line Items]
Revenue	712	703	783
Space & Airborne Systems | Transferred over Time | Fixed-price
Disaggregation of Revenue [Line Items]
Revenue	3,710	3,697	3,612
Space & Airborne Systems | Transferred over Time | Cost-reimbursable
Disaggregation of Revenue [Line Items]
Revenue	2,325	2,256	2,193
Space & Airborne Systems | Transferred over Time | Prime contractor
Disaggregation of Revenue [Line Items]
Revenue	3,818	3,679	3,425
Space & Airborne Systems | Transferred over Time | Subcontractor
Disaggregation of Revenue [Line Items]
Revenue	2,217	2,274	2,380
Space & Airborne Systems | Intersegment | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenue	25	12	18
Communication Systems | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue	4,217	4,287	4,402
Communication Systems | Transferred at Point in Time | United States
Disaggregation of Revenue [Line Items]
Revenue	2,735	3,001	3,138
Communication Systems | Transferred at Point in Time | International
Disaggregation of Revenue [Line Items]
Revenue	1,437	1,232	1,220
Communication Systems | Transferred at Point in Time | Fixed-price
Disaggregation of Revenue [Line Items]
Revenue	3,552	3,631	3,736
Communication Systems | Transferred at Point in Time | Cost-reimbursable
Disaggregation of Revenue [Line Items]
Revenue	620	602	622
Communication Systems | Transferred at Point in Time | Prime contractor
Disaggregation of Revenue [Line Items]
Revenue	2,829	2,886	3,054
Communication Systems | Transferred at Point in Time | Subcontractor
Disaggregation of Revenue [Line Items]
Revenue	1,343	1,347	1,304
Communication Systems | Intersegment | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue	$ 45	$ 54	$ 44