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, 2016	Jun. 30, 2015
Cash Flow Hedging
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net		$ (2)	$ 4
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		(103)	158
Fair Value Hedging
Derivative, Gain (Loss) on Derivative, Net		0	0
Net Investment Hedging
Derivative, Notional Amount		3,013	537
Derivative Asset		28	96
Derivative Liability		(115)	(1)
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net		(53)	60
Derivative, Gain (Loss) on Derivative, Net		(2)	(1)
Foreign Exchange Contract | Cash Flow Hedging
Derivative, Notional Amount		798	951
Derivative Asset		94	312
Derivative Liability		(63)	0
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net		0	5
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		(106)	152
Interest Rate Contract | Cash Flow Hedging
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net		(2)	(1)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		3	6
Interest Rate Contract | Fair Value Hedging
Derivative, Notional Amount		4,993	7,208
Derivative Asset		371	172
Derivative Liability		0	(13)
Derivative, Gain (Loss) on Derivative, Net		212	(9)
Not Designated as Hedging Instrument | Foreign Exchange Contract
Derivative, Notional Amount		6,482	6,610
Derivative Asset		28	13
Derivative Liability		(38)	(68)
Derivative, Gain (Loss) on Derivative, Net	[1]	(120)	(987)
Debt | Fair Value Hedging
Derivative, Gain (Loss) on Derivative, Net		$ (212)	$ 9

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