SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023	Jun. 30, 2023
Accounting Policies [Abstract]
Restricted cash	$ 26.0		$ 26.0		$ 36.9
Effective income tax rate, percentage	(158.80%)	21.00%	34.30%	22.10%
Benefit from the resolution of foreign uncertain tax positions	$ 8.5
Income before income taxes	3.4	$ 141.6	$ 311.9	$ 626.0
Change in enacted tax rate, amount			24.3
Gross unrecognized tax benefits	219.0		219.0		235.5
Unrecognized tax benefits that would impact effective tax rate	174.5		174.5
Unrecognized tax benefits, net	210.2		210.2		218.6
Interest and penalties expense	0.0	$ 3.5	2.0	$ 4.9
Gross accrued interest and penalties	35.1		35.1		$ 33.1
Reasonably possible decrease in UTBs (up to)	$ 32.2		$ 32.2

Income Tax Examination, Penalties and Interest Expense (Benefit), Accrual (Release)

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Unrecognized Tax Benefits, Liability Including Income Tax Penalties and Interest Accrued

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Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.

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Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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