PENSION AND OTHER POSTRETIREMENT BENEFITS - Roll Forward of Projected Benefit Obligations (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jan. 03, 2020	Dec. 31, 2021	Jan. 01, 2021	Jun. 28, 2019
Change in benefit obligation
Benefit obligation at beginning of fiscal year		$ 11,432	$ 10,637
Service cost		68	67
Interest cost		193	283
Actuarial (gain) loss		(403)	1,059
Benefits paid		(579)	(595)
Settlements		(268)	0
Expenses paid		(31)	(42)
Divestiture		(65)	0
Other		8	23
Benefit obligation at end of fiscal year	$ 10,637	10,355	11,432
Pension
Change in benefit obligation
Benefit obligation at beginning of fiscal year		11,045	10,268
Service cost	42	66	65	$ 36
Interest cost	149	188	273	209
Actuarial (gain) loss		(381)	1,035
Benefits paid		(555)	(569)
Settlements		(268)	0
Expenses paid		(31)	(42)
Divestiture		(65)	0
Other		8	15
Benefit obligation at end of fiscal year	10,268	10,007	11,045
Other Benefits
Change in benefit obligation
Benefit obligation at beginning of fiscal year		387	369
Service cost	1	2	2	0
Interest cost	5	5	10	$ 8
Actuarial (gain) loss		(22)	24
Benefits paid		(24)	(26)
Settlements		0	0
Expenses paid		0	0
Divestiture		0	0
Other		0	8
Benefit obligation at end of fiscal year	$ 369	$ 348	$ 387