RETIREMENT BENEFITS - Contributions (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
U.S. plans | Pension plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions (reimbursements)	$ 29	$ 28
Company net contributions (reimbursements) made during the remainder of the year		30
Company contributions expected to be made during the remainder of the year	32
U.S. plans | Postretirement benefit plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions (reimbursements)	10	20
Company net contributions (reimbursements) made during the remainder of the year		(12)
Company contributions expected to be made during the remainder of the year	3
Non-U.S. plans | Pension plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions (reimbursements)	56	60
Company net contributions (reimbursements) made during the remainder of the year		58
Company contributions expected to be made during the remainder of the year	44
Non-U.S. plans | Postretirement benefit plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions (reimbursements)	5	5
Company net contributions (reimbursements) made during the remainder of the year		$ 4
Company contributions expected to be made during the remainder of the year	$ 5