RETIREMENT BENEFITS - Net (Benefit) Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
U.S. plans | Pension plans
Service-related expense
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost on benefit obligation	119	119	356	355
Expected return on assets	(150)	(150)	(451)	(453)
Amortization of unrecognized:
Prior service cost (benefit)	0	0	1	1
Net actuarial loss (gain)	49	43	147	134
Settlement loss	0	0	0	0
Total net expense (benefit)	18	12	53	37
U.S. plans | Postretirement benefit plans
Service-related expense
Service cost	0	0	0	0
Interest cost on benefit obligation	4	4	11	12
Expected return on assets	(3)	(3)	(8)	(8)
Amortization of unrecognized:
Prior service cost (benefit)	(2)	(2)	(7)	(7)
Net actuarial loss (gain)	(3)	(2)	(9)	(7)
Settlement loss	0	0	0	0
Total net expense (benefit)	(4)	(3)	(13)	(10)
Non-U.S. plans | Pension plans
Service-related expense
Service cost	28	28	82	87
Interest cost on benefit obligation	108	105	314	323
Expected return on assets	(96)	(80)	(278)	(249)
Amortization of unrecognized:
Prior service cost (benefit)	(1)	(1)	(3)	(3)
Net actuarial loss (gain)	17	18	49	61
Settlement loss	0	4	0	6
Total net expense (benefit)	56	74	164	225
Non-U.S. plans | Postretirement benefit plans
Service-related expense
Service cost	1	0	1	1
Interest cost on benefit obligation	30	25	87	82
Expected return on assets	(19)	(19)	(54)	(61)
Amortization of unrecognized:
Prior service cost (benefit)	(2)	(1)	(5)	(5)
Net actuarial loss (gain)	3	3	8	8
Settlement loss	0	0	0	0
Total net expense (benefit)	$ 13	$ 8	$ 37	$ 25