ACCUMULATED OTHER COMPREHENSIVE INCOME - ADDITIONAL INFORMATION (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	$ (186)	$ 5	$ 739
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	(6)	7	0
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	(551)	621	$ (328)
Reclassification out of Accumulated Other Comprehensive Income
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	0	(1)
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	0	0
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	191	87
Other Comprehensive Income (Loss)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	(186)	6
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	(6)	7
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	$ 360	$ (708)