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PENSION, DEFERRED COMPENSATION AND POST-RETIREMENT BENEFIT PLANS - Amounts Recognized in AOCI (Before Tax) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Defined Benefit Plan Disclosure
Balance, beginning of year	$ (4,384)
Translation adjustments	(20)	$ 32	$ (101)
Balance, end of year	(4,688)	(4,384)
Total amounts recognized in AOCI	234
Net actuarial (gains) losses recognized
Defined Benefit Plan Disclosure
Balance, beginning of year	324
Amounts before reclassification	(67)	(71)	114
Amounts reclassified out	(19)	(28)	(22)
Translation adjustments	1
Balance, end of year	239	324
Net prior service cost (credit) recognized
Defined Benefit Plan Disclosure
Balance, beginning of year	1
Amounts reclassified out	(1)	(3)	$ (4)
Prior service credit recognized	(5)
Balance, end of year	(5)	1
Pension Plans \| U.S.
Defined Benefit Plan Disclosure
Total amounts recognized in AOCI	190	232
Pension Plans \| U.S. \| Net actuarial (gains) losses recognized
Defined Benefit Plan Disclosure
Balance, beginning of year	230
Amounts before reclassification	(28)
Amounts reclassified out	(14)
Balance, end of year	188	230
Pension Plans \| U.S. \| Net prior service cost (credit) recognized
Defined Benefit Plan Disclosure
Balance, beginning of year	2
Balance, end of year	2	2
Pension Plans \| International
Defined Benefit Plan Disclosure
Total amounts recognized in AOCI	40	72
Pension Plans \| International \| Net actuarial (gains) losses recognized
Defined Benefit Plan Disclosure
Balance, beginning of year	74
Amounts before reclassification	(23)
Amounts reclassified out	(5)
Translation adjustments	1
Balance, end of year	47	74
Pension Plans \| International \| Net prior service cost (credit) recognized
Defined Benefit Plan Disclosure
Balance, beginning of year	(2)
Prior service credit recognized	(5)
Balance, end of year	(7)	(2)
Other than Pension Plans Post-retirement
Defined Benefit Plan Disclosure
Total amounts recognized in AOCI	4	21
Other than Pension Plans Post-retirement \| Net actuarial (gains) losses recognized
Defined Benefit Plan Disclosure
Balance, beginning of year	20
Amounts before reclassification	(16)
Balance, end of year	4	20
Other than Pension Plans Post-retirement \| Net prior service cost (credit) recognized
Defined Benefit Plan Disclosure
Balance, beginning of year	1
Amounts reclassified out	$ (1)
Balance, end of year		$ 1