RETIREMENT BENEFITS - Net (Benefit) Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
U.S. Plans | Pension Plans
Service-related expense
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost on benefit obligation	123	105	250	191
Expected return on plan assets	(160)	(154)	(321)	(308)
Amortization of unrecognized:
Prior service (benefit)	0	0	1	1
Net actuarial loss (gain)	41	44	79	100
Curtailment (gain)	0	0	0	0
Settlement loss	0	0	0	0
Total net expense	4	(5)	9	(16)
U.S. Plans | Postretirement Benefit Plans
Service-related expense
Service cost	0	0	0	0
Interest cost on benefit obligation	4	4	9	7
Expected return on plan assets	(4)	(3)	(7)	(6)
Amortization of unrecognized:
Prior service (benefit)	(3)	(3)	(5)	(5)
Net actuarial loss (gain)	(2)	(2)	(5)	(3)
Curtailment (gain)	0	0	0	0
Settlement loss	0	0	0	0
Total net expense	(5)	(4)	(8)	(7)
Non-U.S. plans | Pension Plans
Service-related expense
Service cost	30	30	58	64
Interest cost on benefit obligation	102	79	200	152
Expected return on plan assets	(82)	(66)	(163)	(132)
Amortization of unrecognized:
Prior service (benefit)	(1)	(1)	(3)	(3)
Net actuarial loss (gain)	15	14	34	27
Curtailment (gain)	0	(23)	(8)	(23)
Settlement loss	1	(10)	4	(10)
Total net expense	65	23	122	75
Non-U.S. plans | Postretirement Benefit Plans
Service-related expense
Service cost	0	0	1	1
Interest cost on benefit obligation	27	23	52	46
Expected return on plan assets	(20)	(18)	(39)	(38)
Amortization of unrecognized:
Prior service (benefit)	(2)	(1)	(4)	(4)
Net actuarial loss (gain)	(5)	1	(10)	2
Curtailment (gain)	0	0	0	0
Settlement loss	0	0	0	0
Total net expense	$ 0	$ 5	$ 0	$ 7