RETIREMENT BENEFITS - Contributions (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
U.S. plans | Pension plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions (reimbursements)	$ 15	$ 14
Company net contributions (reimbursements) made during the remainder of the year	42	44
U.S. plans | Postretirement benefit plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions (reimbursements)	12	13
Company net contributions (reimbursements) made during the remainder of the year	4	(5)
Non-U.S. plans | Pension plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions (reimbursements)	25	34
Company net contributions (reimbursements) made during the remainder of the year	80	84
Non-U.S. plans | Postretirement benefit plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions (reimbursements)	2	2
Company net contributions (reimbursements) made during the remainder of the year	$ 8	$ 7