RISK MANAGEMENT ACTIVITIES AND FAIR VALUE MEASUREMENTS - DERIVATIVE INSTRUMENTS, EFFECT ON OTHER COMPREHENSIVE INCOME (LOSS) (Details) - Derivatives in Net Investment Hedging Relationships - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net		$ 18	$ 15	$ 50	$ 45
Accumulated Other Comprehensive Income, Gain (Loss)		$ 237	$ 509	$ 804	$ (732)
Foreign Exchange Contract
Derivative Instruments, Gain (Loss) [Line Items]
Description of Location of Gain (Loss) on Net Investment Hedges in Financial Statements	[1],[2]	104	393	530	(145)

[1] For the derivatives in net investment hedging relationships, the amount of gain excluded from effectiveness testing, which was recognized in earnings, was $18 and $15 for the three months ended March 31, 2022 and 2021, respectively. The amount of gain excluded from effectiveness testing was $50 and $45 for the nine months ended March 31, 2022 and 2021, 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 recognized in Accumulated other comprehensive income (AOCI) for such instruments was $237 and $509 for the three months ended March 31, 2022 and 2021, respectively. The amount of gain/(loss) recognized in AOCI for such instruments was $804 and $(732) for the nine months ended March 31, 2022 and 2021, respectively.