DERIVATIVE INSTRUMENTS - Gains and Losses Recognized in OCI (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Cash Flow Hedging \| Foreign exchange forward contracts
Derivative [Line Items]
Gain (Loss) Recognized in OCI	$ (0.2)	$ (0.9)	$ (0.4)	$ (0.3)
Cash Flow Hedging \| Interest rate swap contracts
Derivative [Line Items]
Gain (Loss) Recognized in OCI	11.2	2.8	22.7	48.1
Net investment hedge
Derivative [Line Items]
Gain (Loss) Recognized in OCI	$ (23.7)	$ (9.0)	$ (56.7)	$ 29.1

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration