SHARE-BASED COMPENSATION PLANS - Outstanding Nonqualified Stock Options Activity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Shares
Outstanding, beginning balance (in shares)	27.9
Granted (in shares)	2.2	19.4	5.9
Exercised (in shares)	(0.3)
Forfeited (in shares)	(11.8)
Outstanding, ending balance (in shares)	18.0	27.9
Vested and expected to vest (in shares)	15.0
Exercisable (in shares)	0.8
Weighted Average Exercise Price
Outstanding, weighted average exercise price, beginning balance (in dollars per share)	$ 12.89
Granted (in dollars per share)	12.21
Exercised (in dollars per share)	9.56
Forfeited (in dollars per share)	12.79
Outstanding, weighted average exercise price, ending balance (in dollars per share)	12.93	$ 12.89
Vested and expected to vest (in dollars per share)	12.75
Exercisable (in dollars per share)	$ 10.24
Aggregate Intrinsic Value and Weighted Average Remaining Contractual Term
Vested and expected to vest, aggregate intrinsic value	$ 0.0
Exercisable, aggregate intrinsic value	$ 0.0
Vested and expected to vest, weighted average remaining contractual term	7 years 11 months 1 day
Exercisable, weighted average remaining contractual term	9 months 25 days