DERIVATIVE INSTRUMENTS - Narrative (Details) - USD ($)	1 Months Ended		3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Payment for termination of derivative			$ 37,600,000	$ 0
Accumulated other comprehensive income (loss)	$ (462,100,000)		(462,100,000)		$ (456,200,000)
Other Foreign Currency Translation Adjustments | Net investment hedge
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Accumulated other comprehensive income (loss)	88,800,000		88,800,000		261,900,000
Cross-currency swap contracts | Net investment hedge
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	550,000,000.0		550,000,000.0
Payment for termination of derivative	37,600,000
Interest rate swap contracts | Interest Rate Risk
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	3,000,000,000.0		3,000,000,000.0		3,000,000,000.0
Derivative, incremental notional amount		$ 1,000,000,000.0
Foreign exchange forward contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cash flow hedges in AOCI, net of tax	(37,300,000)		(37,300,000)		(43,000,000.0)
Cash flow hedge to be reclassified during next 12 months	(23,400,000)		(23,400,000)
Foreign exchange forward contracts | Other Foreign Currency Translation Adjustments | Net investment hedge
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Accumulated other comprehensive income (loss)	$ (37,600,000)		$ (37,600,000)		$ (12,500,000)