INCOME TAXES - Expirations of tax loss carry forwards (Details) $ in Millions	Jun. 30, 2015 USD ($)
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	$ 264.3
Tax Year 2016
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	14.9
Tax Year 2017
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	18.2
Tax Year 2018
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	37.8
Tax Year 2019
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	51.6
Tax Year 2020 and Thereafter
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	141.8
United States
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	0.0
United States | Tax Year 2016
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	0.0
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 and Thereafter
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	0.0
Western Europe
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	44.6
Western Europe | Tax Year 2016
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	0.0
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 and Thereafter
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	44.6
Rest of World
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	219.7
Rest of World | Tax Year 2016
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	14.9
Rest of World | Tax Year 2017
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	18.2
Rest of World | Tax Year 2018
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	37.8
Rest of World | Tax Year 2019
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	51.6
Rest of World | Tax Year 2020 and Thereafter
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	$ 97.2