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, 2022	Jun. 30, 2021
Derivative, Notional Amount	$ 18,540	$ 20,959
Derivative Asset	570	255
Derivative Liability	(369)	(116)
Designated as Hedging Instrument
Derivative, Notional Amount	12,915	15,899
Derivative Asset	564	235
Derivative Liability	(308)	(94)
Interest Rate Contract | Fair Value Hedging
Derivative, Notional Amount	4,972	7,415
Derivative Asset	3	146
Derivative Liability	(307)	0
Foreign Exchange Contract | Not Designated as Hedging Instrument
Derivative, Notional Amount	5,625	5,060
Derivative Asset	6	20
Derivative Liability	(61)	(22)
Foreign Exchange Contract | Net Investment Hedging
Derivative, Notional Amount	7,943	8,484
Derivative Asset	561	89
Derivative Liability	$ (1)	$ (94)