MANDATORILY REDEEMABLE FINANCIAL INTERESTS AND REDEEMABLE NONCONTROLLING INTERESTS - Mandatorily Redeemable Financial Interest (Details) - USD ($) $ in Millions	Mar. 31, 2018	Jun. 30, 2017	May 23, 2017
United Arab Emirates Joint Venture
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners (percent)	25.00%
Mandatorily redeemable financial instrument, noncontrolling interest	$ 5.9	$ 5.2
Southeastern Asian Subsidiary
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners (percent)			49.00%
Mandatorily redeemable financial instrument, noncontrolling interest	49.2	49.3
Purchase of additional noncontrolling interest			$ 45.0
Other Noncurrent Liabilities | United Arab Emirates Joint Venture
Noncontrolling Interest [Line Items]
Mandatorily redeemable financial instrument, noncontrolling interest	4.7	4.7
Other Noncurrent Liabilities | Southeastern Asian Subsidiary
Noncontrolling Interest [Line Items]
Mandatorily redeemable financial instrument, noncontrolling interest	41.7	41.7
Accrued Expenses and Other Current Liabilities | United Arab Emirates Joint Venture
Noncontrolling Interest [Line Items]
Mandatorily redeemable financial instrument, noncontrolling interest	1.2	0.5
Accrued Expenses and Other Current Liabilities | Southeastern Asian Subsidiary
Noncontrolling Interest [Line Items]
Mandatorily redeemable financial instrument, noncontrolling interest	$ 7.5	$ 7.6