RETIREMENT BENEFITS - Net (Benefit) Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
U.S. plans | Pension plans
Service-related expense
Service cost	$ 0	$ 0
Interest cost on benefit obligation	118	117
Expected return on assets	(150)	(151)
Amortization of unrecognized:
Prior service (benefit)	0	0
Net actuarial loss (gain)	48	46
Total net expense (benefit)	16	12
U.S. plans | Postretirement benefit plans
Service-related expense
Service cost	0	0
Interest cost on benefit obligation	4	4
Expected return on assets	(3)	(3)
Amortization of unrecognized:
Prior service (benefit)	(2)	(2)
Net actuarial loss (gain)	(3)	(2)
Total net expense (benefit)	(4)	(3)
Non-U.S. plans | Pension plans
Service-related expense
Service cost	26	29
Interest cost on benefit obligation	100	109
Expected return on assets	(88)	(87)
Amortization of unrecognized:
Prior service (benefit)	(1)	(1)
Net actuarial loss (gain)	16	23
Total net expense (benefit)	53	73
Non-U.S. plans | Postretirement benefit plans
Service-related expense
Service cost	0	0
Interest cost on benefit obligation	28	29
Expected return on assets	(17)	(22)
Amortization of unrecognized:
Prior service (benefit)	(2)	(2)
Net actuarial loss (gain)	3	3
Total net expense (benefit)	$ 12	$ 8