RETIREMENT BENEFITS PLANS - Change in Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Change in plan assets
Balance at January 1	$ 5,919
Balance at December 31	4,121	$ 5,919
Pension plans
Change in plan assets
Employer contributions	116	343	$ 122
Pension plans | United States
Change in plan assets
Balance at January 1	3,672	3,463
Actual return on plan assets	(682)	380
Employer contributions	30	237	18
Gross benefits paid	(386)	(435)
Currency translation	0	0
Acquisitions and divestitures	0	27
Other	0	0
Balance at December 31	2,635	3,672	3,463
Pension plans | Foreign Plan
Change in plan assets
Balance at January 1	2,247	2,137
Actual return on plan assets	(554)	127
Employer contributions	85	106	104
Gross benefits paid	(99)	(107)
Currency translation	(197)	(23)
Acquisitions and divestitures	0	4
Other	3	3
Balance at December 31	1,486	2,247	2,137
Other postretirement benefits plans
Change in plan assets
Balance at January 1	19	20
Actual return on plan assets	(2)	0
Employer contributions	24	20
Gross benefits paid	(38)	(36)
Currency translation	0	0
Acquisitions and divestitures	0	0
Other	13	15
Balance at December 31	$ 16	$ 19	$ 20