RETIREMENT BENEFITS - Defined Contribution Plans and Postemployment Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Postemployment Retirement Benefits
Defined Benefit Plan Disclosure
Non-service-related expense	$ 5	$ 5
Total net expense	5	5
U.S. | Postretirement Benefit Plans
Defined Benefit Plan Disclosure
Company's contributions for defined contribution plans	119	105
Total net expense	(3)	(3)
Non-U.S. plans | Postretirement Benefit Plans
Defined Benefit Plan Disclosure
Company's contributions for defined contribution plans	106	92
Total net expense	$ 2	$ 8