BUSINESS SEGMENT INFORMATION - Revenues and Income From Continuing Operations by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Apr. 01, 2022
Revenue from Product Sales and Services
Revenue from product sales and services	$ 4,471	$ 4,103
Unallocated Items:
Unallocated corporate department expense, net	(6)	(4)
Amortization of acquisition-related intangibles	(165)	(152)
Acquisition-related transaction and integration expenses	(40)	0
L3Harris merger-related integration expenses	0	(24)
Impairment of other assets	(18)	0
Additional cost of sales related to the fair value step-up in inventory sold	(15)	0
Enterprise transformation program	(13)	0
Pre-acquisition and other divestiture-related expenses	(10)	(1)
FAS/CAS operating adjustment	(22)	(22)
Total unallocated items	(245)	(159)
Non-operating income, net	82	106
Interest expense, net	(102)	(68)
Income before income taxes	373	536
FAS/CAS operating adjustment	22	22
Pension
Unallocated Items:
FAS pension service cost	(6)	(10)
Non-service FAS pension income	(70)	(105)
Pension | Plans Under US Government Contracts
Unallocated Items:
FAS/CAS operating adjustment	(22)	(22)
FAS pension service cost	(6)	(11)
Less: CAS pension cost	(28)	(33)
FAS/CAS operating adjustment	22	22
Non-service FAS pension income	77	110
Net FAS/CAS pension adjustment	99	132
IMS
Revenue from Product Sales and Services
Revenue from product sales and services	1,700	1,659
SAS
Revenue from Product Sales and Services
Revenue from product sales and services	1,655	1,517
CS
Revenue from Product Sales and Services
Revenue from product sales and services	1,163	963
Operating segments
Income before Income Taxes
Segment Operating Income:	638	657
Operating segments | IMS
Revenue from Product Sales and Services
Revenue from product sales and services	1,700	1,659
Income before Income Taxes
Segment Operating Income:	185	251
Operating segments | SAS
Revenue from Product Sales and Services
Revenue from product sales and services	1,655	1,517
Income before Income Taxes
Segment Operating Income:	187	177
Operating segments | CS
Revenue from Product Sales and Services
Revenue from product sales and services	1,163	963
Income before Income Taxes
Segment Operating Income:	266	229
Corporate
Revenue from Product Sales and Services
Revenue from product sales and services	$ (47)	$ (36)