RISK MANAGEMENT ACTIVITIES AND FAIR VALUE MEASUREMENTS - GAINS AND LOSSES ON DERIVATIVES IN NET INVESTMENT HEDGES (Details) - USD ($) $ in Millions		12 Months Ended
		Jun. 30, 2019	Jun. 30, 2018
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net		$ 70	$ 138
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	[1],[2]	47	(187)
Accumulated Other Comprehensive Income, Gain (Loss)		$ 299	$ (391)

[1] 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 AOCI for such instruments was $299 and $(391), as of June 30, 2019 and 2018, respectively.

[2] For the derivatives in net investment hedging relationships, the amount of gain/(loss) excluded from effectiveness testing, which was recognized in earnings, was $70 and $138 for the fiscal year ended June 30, 2019 and 2018, respectively.