MANDATORILY REDEEMABLE FINANCIAL INTERESTS AND REDEEMABLE NONCONTROLLING INTERESTS - Mandatorily Redeemable Financial Interest (Details) - USD ($) $ in Millions	Mar. 31, 2019	Jun. 30, 2018	May 23, 2017
United Arab Emirates Joint Venture
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners	25.00%
Southeastern Asian Subsidiary
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners			49.00%
United Arab Emirates Joint Venture
Noncontrolling Interest [Line Items]
Mandatorily redeemable financial instrument, noncontrolling interest	$ 7.7	$ 8.2
United Arab Emirates Joint Venture | Other Noncurrent Liabilities
Noncontrolling Interest [Line Items]
Mandatorily redeemable financial instrument, noncontrolling interest	6.3	6.7
United Arab Emirates Joint Venture | Accrued Expenses and Other Current Liabilities
Noncontrolling Interest [Line Items]
Mandatorily redeemable financial instrument, noncontrolling interest	1.4	1.5
Southeastern Asian Subsidiary
Noncontrolling Interest [Line Items]
Mandatorily redeemable financial instrument, noncontrolling interest	$ 52.6	$ 45.1
Purchase of additional noncontrolling interest			$ 45.0