RETIREMENT BENEFITS PLANS - Change in Benefit Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension plans | United States
Change in benefit obligations
Balance at January 1	$ 3,760	$ 4,121
Service cost	27	37	$ 97
Interest cost	117	70	103
Actuarial (gain) loss	(713)	(82)
Gross benefits paid	(386)	(435)
Currency translation	0	0
Plan amendments	1	1
Acquisitions and divestitures	0	48
Other	0	0
Balance at December 31	2,807	3,760	4,121
Accumulated benefit obligation	2,784	3,707
Pension plans | Foreign Plan
Change in benefit obligations
Balance at January 1	2,837	3,036
Service cost	59	72	73
Interest cost	47	40	45
Actuarial (gain) loss	(817)	(143)
Gross benefits paid	(99)	(107)
Currency translation	(218)	(79)
Plan amendments	1	0
Acquisitions and divestitures	0	14
Other	3	4
Balance at December 31	1,813	2,837	3,036
Accumulated benefit obligation	1,737	2,709
Other postretirement benefits plans
Change in benefit obligations
Balance at January 1	304	375
Service cost	1	1	2
Interest cost	7	6	9
Actuarial (gain) loss	(73)	(59)
Gross benefits paid	(38)	(36)
Currency translation	(3)	0
Plan amendments	(2)	0
Acquisitions and divestitures	0	2
Other	13	15
Balance at December 31	$ 209	$ 304	$ 375