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		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	$ 17	$ 34	$ 44	$ 107
Accumulated Other Comprehensive Income, Gain (Loss)	$ 226	$ (535)	$ 467	$ (1,280)