INCOME TAXES - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2025	Jun. 30, 2024
Classification:
Long-term deferred tax assets (included in Other non-current assets)	$ 26.8	$ 23.8
Long-term deferred tax liabilities	(261.0)	(277.3)
Net deferred tax liabilities	(234.2)	(253.5)
Deferred tax assets:
Accrued expenses not currently deductible	14.9	21.4
Compensation and benefits not currently deductible	91.5	86.5
Net operating losses	24.6	23.1
Tax credits	7.3	6.0
Research and development expenses	139.0	162.1
Deferred revenue	70.5	85.6
Cross Currency Swap and Treasury-Locks	7.7	0.0
Other	3.4	4.3
Total deferred tax assets	358.8	388.9
Less: Valuation allowances	(11.2)	(10.8)
Deferred tax assets, net	347.6	378.1
Deferred tax liabilities:
Goodwill and identifiable intangibles	174.5	186.4
Depreciation	5.5	11.9
Deferred expenses	376.6	390.6
Unremitted earnings	8.0	10.4
Cross Currency Swap and Treasury-Locks	0.0	13.1
Other	17.3	19.1
Deferred tax liabilities	581.9	631.6
Net deferred tax liabilities	$ (234.2)	$ (253.5)