RISK MANAGEMENT ACTIVITIES AND FAIR VALUE MEASUREMENTS - GAIN (LOSS) ON DERIVATIVE INSTRUMENTS (EFFECTIVE PORTION) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Jun. 30, 2017
Foreign Exchange Contract \| Derivatives in Net Investment Hedging Relationships
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated Other Comprehensive Income, Amount of Gain (Loss) Recognized on Derivatives	$ (239)	$ (104)

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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