DEBT - Loss on Early Extinguishment of Debt (Details) - USD ($) $ in Millions	12 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Debt Instrument [Line Items]
Deferred financing fees write-off	$ 0.0	$ 2.0	$ 0.0
Line of Credit
Debt Instrument [Line Items]
Deferred financing fees write-off	$ 0.0	$ 8.7	$ 0.0

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

Name:	us-gaap_WriteOffOfDeferredDebtIssuanceCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration