INCOME TAXES - Narrative (Details) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2016 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2017 USD ($) jurisdiction	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)
Income Tax Contingency [Line Items]
Tax benefit recognized			$ 259.5	$ 40.4	$ 26.1
Reduction of gross unrecognized tax benefits			1.5	72.7	29.7
Valuation allowance			$ 60.3	179.2
Acquired finite-lived intangible assets, useful life			21 years 1 month 6 days
Net operating losses not reflected as part of net deferred tax assets			$ 12.0
Tax loss carry forwards subject to expiration			1,327.6
Unrecognized tax benefits			257.9	228.9	342.6	$ 400.5
Unrecognized tax benefits that would impact effective tax rate			243.1
Accrued interest and penalties			154.6	131.9
Interest accrued			1.4	1.2	(4.4)
Penalties accrued			$ 0.1	0.1	$ (1.0)
Number of tax jurisdictions | jurisdiction			55
Income tax expense (benefit)			$ 12.3	51.4
Amount of decrease in UTBs			10.1
Undistributed earnings of foreign subsidiaries			2,412.7
Other Noncurrent Liabilities
Income Tax Contingency [Line Items]
Accrued interest and penalties			$ 11.7	9.9
Intellectual Property
Income Tax Contingency [Line Items]
Acquired finite-lived intangible assets, useful life			20 years
Intellectual Property | Prepaid Expenses and Other Current Assets
Income Tax Contingency [Line Items]
Prepaid income taxes			$ 7.6	7.6
Intellectual Property | Other Noncurrent Assets
Income Tax Contingency [Line Items]
Prepaid income taxes			$ 128.2	$ 135.8
IRS | Domestic Tax Authority
Income Tax Contingency [Line Items]
Valuation allowance		$ 111.2
IRS | Domestic Tax Authority | Settlement with Taxing Authority
Income Tax Contingency [Line Items]
Tax benefit recognized		194.4
Reduction of gross unrecognized tax benefits		29.7
IRS | Domestic Tax Authority | Settlement with Taxing Authority | Trademarks
Income Tax Contingency [Line Items]
Recognition of additional deferred tax assets		$ 164.7
Galleria
Income Tax Contingency [Line Items]
Valuation allowance	$ 111.2