RETIREMENT BENEFITS - Net (Benefit) Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Amortization of unrecognized:
Total net expense	$ 9	$ 1	$ 14	$ 6
U.S. plans | Pension plans
Service-related expense
Service cost	0	0	0	0
Interest cost on benefit obligation	119	123	236	250
Expected return on plan assets	(152)	(160)	(303)	(321)
Amortization of unrecognized:
Prior service cost (benefit)	1	0	1	1
Net actuarial loss (gain)	45	41	91	79
Curtailment (gain)			0	0
Settlement loss	0	0	0	0
Total net expense	13	4	25	9
U.S. plans | Postretirement benefit plans
Service-related expense
Service cost	0	0	0	0
Interest cost on benefit obligation	4	4	8	9
Expected return on plan assets	(2)	(4)	(5)	(7)
Amortization of unrecognized:
Prior service cost (benefit)	(3)	(3)	(5)	(5)
Net actuarial loss (gain)	(3)	(2)	(5)	(5)
Curtailment (gain)			0	0
Settlement loss	0	0	0	0
Total net expense	(4)	(5)	(7)	(8)
Non-U.S. plans | Pension plans
Service-related expense
Service cost	30	30	59	58
Interest cost on benefit obligation	109	102	218	200
Expected return on plan assets	(82)	(82)	(169)	(163)
Amortization of unrecognized:
Prior service cost (benefit)	(1)	(1)	(2)	(3)
Net actuarial loss (gain)	20	15	43	34
Curtailment (gain)			0	(8)
Settlement loss	2	1	2	4
Total net expense	78	65	151	122
Non-U.S. plans | Postretirement benefit plans
Service-related expense
Service cost	1	0	1	1
Interest cost on benefit obligation	28	27	57	52
Expected return on plan assets	(20)	(20)	(42)	(39)
Amortization of unrecognized:
Prior service cost (benefit)	(2)	(2)	(4)	(4)
Net actuarial loss (gain)	2	(5)	5	(10)
Curtailment (gain)			0	0
Settlement loss	0	0	0	0
Total net expense	$ 9	$ 0	$ 17	$ 0