RISK MANAGEMENT ACTIVITIES AND FAIR VALUE MEASUREMENTS - SCHEDULE OF DERIVATIVE INSTRUMENTS (Details) - USD ($) $ in Millions	Mar. 31, 2023	Jun. 30, 2022
Derivative [Line Items]
Derivative, Notional Amount	$ 20,101	$ 18,540
Derivative Asset	43	570
Derivative Liability	(1,148)	(369)
Derivatives in Fair Value Hedging Relationships | Interest Rate Contracts
Derivative [Line Items]
Derivative, Notional Amount	4,054	4,972
Derivative Asset	0	3
Derivative Liability	(445)	(307)
Derivatives in Net Investment Hedging Relationships | Foreign Exchange Contract
Derivative [Line Items]
Derivative, Notional Amount	10,349	7,943
Derivative Asset	4	561
Derivative Liability	(685)	(1)
Designated as Hedging Instrument
Derivative [Line Items]
Derivative, Notional Amount	14,403	12,915
Derivative Asset	4	564
Derivative Liability	(1,130)	(308)
Not Designated as Hedging Instrument | Foreign Exchange Contract
Derivative [Line Items]
Derivative, Notional Amount	5,698	5,625
Derivative Asset	39	6
Derivative Liability	$ (18)	$ (61)