INCOME TAXES - Expirations of tax loss carry forwards (Details) $ in Millions	Jun. 30, 2016 USD ($)
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	$ 600.2
Tax Year 2017
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	27.2
Tax Year 2018
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	29.7
Tax Year 2019
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	4.1
Tax Year 2020
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	67.6
Tax Year 2021 and Thereafter
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	471.6
United States
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	402.6
United States | Tax Year 2017
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	0.0
United States | Tax Year 2018
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	0.0
United States | Tax Year 2019
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	0.0
United States | Tax Year 2020
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	0.0
United States | Tax Year 2021 and Thereafter
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	402.6
Western Europe
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	28.2
Western Europe | Tax Year 2017
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	0.0
Western Europe | Tax Year 2018
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	0.0
Western Europe | Tax Year 2019
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	0.0
Western Europe | Tax Year 2020
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	0.0
Western Europe | Tax Year 2021 and Thereafter
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	28.2
Rest of World
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	169.4
Rest of World | Tax Year 2017
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	27.2
Rest of World | Tax Year 2018
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	29.7
Rest of World | Tax Year 2019
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	4.1
Rest of World | Tax Year 2020
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	67.6
Rest of World | Tax Year 2021 and Thereafter
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	$ 40.8