RISK MANAGEMENT ACTIVITIES AND FAIR VALUE MEASUREMENTS - FAIR VALUE AND AMOUNT OF GAINS AND LOSSES ON QUALIFYING AND NON-QUALIFYING FINANCIAL INSTRUMENTS USED IN HEDGING TRANSACTIONS (Details) - USD ($) $ in Millions		12 Months Ended
		Jun. 30, 2017	Jun. 30, 2016
Cash Flow Hedging
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net		$ (2)	$ (2)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		69	(103)
Fair Value Hedging
Derivative, Gain (Loss) on Derivative, Net		0	0
Net Investment Hedging
Derivative, Notional Amount		6,102	3,013
Derivative Asset		14	28
Derivative Liability		(177)	(115)
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net		(104)	(53)
Derivative, Gain (Loss) on Derivative, Net		6	(2)
Foreign Exchange Contract | Cash Flow Hedging
Derivative, Notional Amount		0	798
Derivative Asset		0	94
Derivative Liability		0	(63)
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net		0	0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		69	(106)
Foreign Exchange Contract | Not Designated as Hedging Instrument
Derivative, Notional Amount		4,969	6,482
Derivative Asset		25	28
Derivative Liability		(7)	(38)
Derivative, Gain (Loss) on Derivative, Net	[1]	59	(120)
Interest Rate Contract | Cash Flow Hedging
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net		(2)	(2)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		0	3
Interest Rate Contract | Fair Value Hedging
Derivative, Notional Amount		4,552	4,993
Derivative Asset		180	371
Derivative Liability		(2)	0
Derivative, Gain (Loss) on Derivative, Net		(193)	212
Debt | Fair Value Hedging
Derivative, Gain (Loss) on Derivative, Net		$ 193	$ (212)

[1] The gain or loss on non-qualifying foreign currency contracts substantially offsets the foreign currency mark-to-market impact of the related exposure.