RISK MANAGEMENT ACTIVITIES AND FAIR VALUE MEASUREMENTS - DERIVATIVE INSTRUMENTS, EFFECT ON OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Millions		3 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount		$ 20,478		$ 18,538
Derivative Asset		216		33
Derivative Liability		(698)		(1,118)
Derivatives in Net Investment Hedging Relationships
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net		67	$ 46
Accumulated Other Comprehensive Income, Gain (Loss)		$ 344	$ 698
Derivatives in Net Investment Hedging Relationships | Foreign Exchange Contract
Derivative Instruments, Gain (Loss) [Line Items]
Description of Location of Gain (Loss) on Net Investment Hedges in Financial Statements	[1],[2]	285	708
Derivative, Notional Amount		$ 13,207		11,005
Derivative Asset		211		26
Derivative Liability		(230)		(631)
Derivatives in Fair Value Hedging Relationships | Interest Rate Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount		2,961		4,044
Derivative Asset		0		0
Derivative Liability		(434)		(445)
Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount		16,168		15,049
Derivative Asset		211		26
Derivative Liability		(664)		(1,076)
Not Designated as Hedging Instrument | Foreign Exchange Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount		4,310		3,489
Derivative Asset		4		7
Derivative Liability		$ (34)		$ (42)

[1] For the derivatives in net investment hedging relationships, the amount of gain excluded from effectiveness testing, which was recognized in earnings, was $67 and $46 for the three months ended September 30, 2023 and 2022, respectively.

[2] In addition to the foreign currency derivative contracts designated as net investment hedges, certain of our foreign currency denominated debt instruments are designated as net investment hedges. The amount of gain/(loss) recognized in Accumulated other comprehensive income (AOCI) for such instruments was $344 and $698 for the three months ended September 30, 2023 and 2022, respectively.