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, 2024	Jun. 30, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	$ 16,325	$ 18,538
Fair Value Asset	120	33
Fair Value (Liability)	(379)	(1,118)
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	13,133	15,049
Fair Value Asset	119	26
Fair Value (Liability)	(356)	(1,076)
Interest rate contracts | Fair Value Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	2,993	4,044
Fair Value Asset	0	0
Fair Value (Liability)	(325)	(445)
Foreign currency contracts | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	3,192	3,489
Fair Value Asset	1	7
Fair Value (Liability)	(23)	(42)
Foreign currency contracts | Net Investment Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	10,140	11,005
Fair Value Asset	119	26
Fair Value (Liability)	$ (31)	$ (631)