RETIREMENT BENEFITS - Sensitivities of Certain Key Assumptions (Details) - Pension plans $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
U.S. plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Effect of one-percentage-point increase in discount rates	$ 6
Effect of one-percentage-point decrease in discount rates	(7)
Non-U.S. plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Effect of one-percentage-point increase in discount rates	(2)
Effect of one-percentage-point decrease in discount rates	$ 4