RISK MANAGEMENT ACTIVITIES AND FAIR VALUE MEASUREMENTS - NOTIONAL AMOUNTS AND FAIR VALUES OF QUALIFYING AND NON-QUALIFYING FINANCIAL INSTRUMENTS USED IN HEDGING TRANSACTIONS (Details) - USD ($) $ in Millions	Jun. 30, 2023	Jun. 30, 2022
Derivative, Notional Amount	$ 18,538	$ 18,540
Derivative Asset	33	570
Derivative Liability	(1,118)	(369)
Designated as Hedging Instrument
Derivative, Notional Amount	15,049	12,915
Derivative Asset	26	564
Derivative Liability	(1,076)	(308)
Interest Rate Contract | Fair Value Hedging
Derivative, Notional Amount	4,044	4,972
Derivative Asset	0	3
Derivative Liability	(445)	(307)
Foreign Exchange Contract | Not Designated as Hedging Instrument
Derivative, Notional Amount	3,489	5,625
Derivative Asset	7	6
Derivative Liability	(42)	(61)
Foreign Exchange Contract | Net Investment Hedging
Derivative, Notional Amount	11,005	7,943
Derivative Asset	26	561
Derivative Liability	$ (631)	$ (1)