RETIREMENT BENEFITS - Contributions (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
U.S. | Pension Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions	$ 28	$ 27
Company contributions expected to be made during the remainder of the year	31	29
U.S. | Postretirement Benefit Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions		9
Company contributions reimbursements	(1)
Company contributions expected to be made during the remainder of the year	3	13
Non-U.S. plans | Pension Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions	389	78
Company contributions expected to be made during the remainder of the year	52	77
Non-U.S. plans | Postretirement Benefit Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions	5	4
Company contributions expected to be made during the remainder of the year	$ 4	$ 4