RETIREMENT BENEFITS - Contributions (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
U.S. Plans | Pension Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions (reimbursements)	$ 28	$ 28
Company contributions expected to be made during the remainder of the year	32	27
U.S. Plans | Postretirement Benefit Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions (reimbursements)	20	(1)
Company contributions expected to be made during the remainder of the year	2	15
Non-U.S. plans | Pension Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions (reimbursements)	60	389
Company contributions expected to be made during the remainder of the year	52	105
Non-U.S. plans | Postretirement Benefit Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions (reimbursements)	5	5
Company contributions expected to be made during the remainder of the year	$ 5	$ 4