SHARE-BASED COMPENSATION PLANS - Summary of the Total Intrinsic Value of Stock Options Exercised and Payment to Settle Nonqualified Stock Options (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Weighted-average grant date fair value of stock options (in dollars per share)	$ 4.87	$ 6.34	$ 0.00
Intrinsic value of options exercised	$ 32.2	$ 26.3	$ 87.6

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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