PENSION AND OTHER POSTRETIREMENT BENEFITS - Changes in Level 3 Fair Value (Details) - Level 3 - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Direct private investments | U.S. Plans
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	$ 1,336	$ 1,220
Relating to assets still held at year-end	(66)	11
Relating to assets sold during the year	98	174
Purchases	75	194
Sales and settlements	(159)	(263)
Fair value of plan assets at end of year	1,284	1,336
Real estate properties | U.S. Plans
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	843	651
Relating to assets still held at year-end	88	96
Relating to assets sold during the year	(24)	0
Purchases	148	99
Sales and settlements	(50)	(3)
Fair value of plan assets at end of year	1,005	843
Private funds | Non-U.S. Plans
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	33	29
Relating to assets still held at year-end	11	4
Relating to assets sold during the year	0	0
Purchases	0	0
Sales and settlements	(8)	0
Fair value of plan assets at end of year	36	33
Real estate funds | Non-U.S. Plans
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	163	147
Relating to assets still held at year-end	(33)	23
Relating to assets sold during the year	1	4
Purchases	0	0
Sales and settlements	(1)	(11)
Fair value of plan assets at end of year	130	163
Insurance buy-in contracts | Non-U.S. Plans
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	691	767
Relating to assets still held at year-end	(477)	(76)
Relating to assets sold during the year	0	0
Purchases	736	0
Sales and settlements	0	0
Fair value of plan assets at end of year	$ 950	$ 691