RISK MANAGEMENT ACTIVITIES AND FAIR VALUE MEASUREMENTS - DERIVATIVE INSTRUMENTS, EFFECT ON OTHER COMPREHENSIVE INCOME (LOSS) - ADDITIONAL INFORMATION (Details) - Derivatives in Net Investment Hedging Relationships - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	$ 19	$ 14
Accumulated Other Comprehensive Income, Gain (Loss)	$ 609	$ 207