SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Tax Information (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2016
Income Tax Examination [Line Items]
Effective income tax rate, percent	(108.50%)	(101.70%)
Provision (benefit) for income taxes	$ 5.1	$ 67.1
U.S. federal statutory rate, percent	35.00%
Gross unrecognized tax benefits	$ 237.0		$ 228.9
Unrecognized tax benefits that would impact effective tax rate	131.0
Unrecognized tax benefits, net	139.6		131.9
Total interest and penalties	0.1	1.3
Gross accrued interest and penalties	10.4		9.9
Reasonably possible decrease in UTBs (up to $14.7 million)	$ 14.7
Galleria
Income Tax Examination [Line Items]
Tax benefit			$ 111.2
Domestic Tax Authority | IRS
Income Tax Examination [Line Items]
Valuation allowance due to on-going operating losses		113.0
Domestic Tax Authority | IRS | Settlement with Taxing Authority
Income Tax Examination [Line Items]
Provision (benefit) for income taxes		193.9
Reduction of gross unrecognized tax benefits		29.7
Domestic Tax Authority | IRS | Settlement with Taxing Authority | Trademarks
Income Tax Examination [Line Items]
Recognition of additional deferred tax assets		$ 164.2