SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Restricted cash	$ 39.6		$ 43.7
Effective income tax rate, percentage	200.20%	1300.00%
Preliminary income tax benefit	$ 220.5
Gross unrecognized tax benefits	281.2		277.9
Unrecognized tax benefits that would impact effective tax rate	154.5
Unrecognized tax benefits, net	175.3		170.7
Interest and penalties expense	1.3	$ 1.4
Gross accrued interest and penalties	20.8		19.3
Reasonably possible decrease in UTBs (up to)	$ 36.0
Recourse obligation, percentage of net invoice value (up to)	10.00%
Decrease in retained earnings	$ 5,332.9		5,548.6
Cumulative Effect, Period of Adoption, Adjustment \| Adjustment due to the adoption of ASU No. 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease in retained earnings			5.7
Cumulative Effect, Period Of Adoption, Pre-Tax Adjustment \| Adjustment due to the adoption of ASU No. 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease in retained earnings			$ 6.6

Receivables Monetization, Recourse Obligation, Percentage Of Net Invoice Value

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

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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 foreign income tax expense (benefit).

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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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