SHARE-BASED COMPENSATION PLANS - Non-Vested Shares of Series A Preferred Stock (Details) - Series A Preferred Stock shares in Millions	12 Months Ended
	Jun. 30, 2018 $ / shares shares
Shares
Outstanding, beginning balance (in shares) | shares	3.2
Granted (in shares) | shares	1.0
Forfeited (in shares) | shares	0.2
Outstanding, ending balance (in shares) | shares	4.0
Weighted Average Grant Date Fair Value
Outstanding and nonvested, beginning balance (in dollars per share) | $ / shares	$ 5.19
Granted (in dollars per share) | $ / shares	4.12
Forfeited (in dollars per share) | $ / shares	3.63
Outstanding and nonvested, ending balance (in dollars per share) | $ / shares	$ 4.99