DERIVATIVE FINANCIAL INSTRUMENTS - Cumulative Amount of Fair Value Hedging Gain (Loss) (Details) $ in Millions	12 Months Ended
	Jun. 30, 2020 USD ($)
Derivative instruments
Cumulative Amount of Fair Value Hedging Gain/(Loss) Included in the Carrying Amount of the Hedged Liability	$ 15
Derivatives in Fair Value Hedging Relationships
Derivative instruments
Carrying Amount of the Hedged Liabilities	714
Current debt
Derivative instruments
Cumulative Amount of Fair Value Hedging Gain/(Loss) Included in the Carrying Amount of the Hedged Liability	5
Current debt | Derivatives in Fair Value Hedging Relationships
Derivative instruments
Carrying Amount of the Hedged Liabilities	455
Long-term debt
Derivative instruments
Cumulative Amount of Fair Value Hedging Gain/(Loss) Included in the Carrying Amount of the Hedged Liability	10
Long-term debt | Derivatives in Fair Value Hedging Relationships
Derivative instruments
Carrying Amount of the Hedged Liabilities	$ 259