PENSION AND OTHER POSTRETIREMENT BENEFITS - Roll Forward of Plan Assets and Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Jan. 01, 2021
Change in plan assets
Plan assets at beginning of fiscal year	$ 9,600	$ 8,892
Actual return on plan assets	1,258	1,303
Employer contributions	19	31
Benefits paid	(579)	(595)
Settlements	(268)	0
Expenses paid	(31)	(42)
Divestiture	(78)	0
Other	3	11
Plan assets at end of fiscal year	9,924	9,600
Funded status	(431)	(1,832)
Pension
Change in plan assets
Plan assets at beginning of fiscal year	9,301	8,618
Actual return on plan assets	1,215	1,263
Employer contributions	17	20
Benefits paid	(555)	(569)
Settlements	(268)	0
Expenses paid	(31)	(42)
Divestiture	(78)	0
Other	3	11
Plan assets at end of fiscal year	9,604	9,301
Funded status	(403)	(1,744)
Other Benefits
Change in plan assets
Plan assets at beginning of fiscal year	299	274
Actual return on plan assets	43	40
Employer contributions	2	11
Benefits paid	(24)	(26)
Settlements	0	0
Expenses paid	0	0
Divestiture	0	0
Other	0	0
Plan assets at end of fiscal year	320	299
Funded status	$ (28)	$ (88)