POSTRETIREMENT BENEFIT PLANS - Income Statement Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2022	Jul. 02, 2021	Jul. 01, 2022	Jul. 02, 2021
Pension
Operating
Service cost	$ 12	$ 18	$ 22	$ 36
Non-operating
Interest cost	55	46	110	92
Expected return on plan assets	(156)	(157)	(312)	(312)
Amortization of net actuarial loss (gain)	3	10	5	19
Amortization of prior service (credit) cost	(8)	(7)	(14)	(14)
Effect of curtailments or settlements		(3)		(3)
Non-service cost periodic benefit income	(106)	(111)	(211)	(218)
Net periodic benefit income	(94)	(93)	(189)	(182)
Other Benefits
Operating
Service cost	0	0	1	1
Non-operating
Interest cost	2	2	4	3
Expected return on plan assets	(6)	(5)	(11)	(10)
Amortization of net actuarial loss (gain)	(2)	0	(4)	0
Amortization of prior service (credit) cost	1	0	1	0
Effect of curtailments or settlements		0		0
Non-service cost periodic benefit income	(5)	(3)	(10)	(7)
Net periodic benefit income	$ (5)	$ (3)	$ (9)	$ (6)