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Derivatives and Hedging Activities - Fair Value of Derivative Instruments (Details) € in Millions, $ in Millions | Sep. 30, 2017 EUR (€) | Sep. 30, 2017 USD ($) | Dec. 31, 2016 EUR (€) | Dec. 31, 2016 USD ($)
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Derivatives not designated as hedging instruments: |  |  |  |
Total Derivative Assets |  | $ 3.6 |  | $ 40.2
Total Derivative Liabilities |  | (14.3) |  | (16.9)
Net Derivatives |  | (10.7) |  | 23.3
Long-term debt, less current portion |  | 3,219.4 |  | 3,762.6
Reclassified to liabilities held for sale |  | (1.8) |  | (683.3)
Reclassified to assets held for sale |  | 20.8 |  | 825.7
Foreign currency forward contracts |  |  |  |
Derivatives not designated as hedging instruments: |  |  |  |
Total Derivative Assets |  | 3.6 |  | 16.3
Total Derivative Liabilities |  | (14.3) |  | (11.6)
Reclassified to liabilities held for sale |  |  |  | (1.4)
Interest rate and currency swaps |  |  |  |
Derivatives not designated as hedging instruments: |  |  |  |
Total Derivative Assets |  | 0.0 |  | 23.9
Reclassified to assets held for sale |  |  |  | 23.9
Cross-currency swaps |  |  |  |
Derivatives not designated as hedging instruments: |  |  |  |
Total Derivative Liabilities |  | 0.0 |  | (5.3)
Designated as Hedging Instruments | Foreign currency forward contracts |  |  |  |
Derivatives not designated as hedging instruments: |  |  |  |
Long-term debt, less current portion | € 400.0 | 467.9 | € 416.7 | 416.7
Designated as Hedging Instruments | Cash Flow |  |  |  |
Derivatives not designated as hedging instruments: |  |  |  |
Total Derivative Assets |  | 0.2 |  | 28.8
Total Derivative Liabilities |  | (3.0) |  | (0.1)
Net Derivatives |  | (2.8) |  | 28.7
Designated as Hedging Instruments | Cash Flow | Foreign currency forward contracts |  |  |  |
Derivatives not designated as hedging instruments: |  |  |  |
Total Derivative Assets |  | 0.2 |  | 4.9
Total Derivative Liabilities |  | (3.0) |  | (0.1)
Designated as Hedging Instruments | Cash Flow | Interest rate and currency swaps |  |  |  |
Derivatives not designated as hedging instruments: |  |  |  |
Total Derivative Assets |  | 0.0 |  | 23.9
Designated as Hedging Instruments | Cash Flow | Cross-currency swaps |  |  |  |
Derivatives not designated as hedging instruments: |  |  |  |
Total Derivative Liabilities |  | 0.0 |  | 0.0
Designated as Hedging Instruments | Net Investment Hedge |  |  |  |
Derivatives not designated as hedging instruments: |  |  |  |
Total Derivative Assets |  | 0.0 |  | 0.0
Total Derivative Liabilities |  | 0.0 |  | (5.3)
Net Derivatives |  | 0.0 |  | (5.3)
Designated as Hedging Instruments | Net Investment Hedge | Foreign currency forward contracts |  |  |  |
Derivatives not designated as hedging instruments: |  |  |  |
Total Derivative Assets |  | 0.0 |  | 0.0
Total Derivative Liabilities |  | 0.0 |  | 0.0
Designated as Hedging Instruments | Net Investment Hedge | Interest rate and currency swaps |  |  |  |
Derivatives not designated as hedging instruments: |  |  |  |
Total Derivative Assets |  | 0.0 |  | 0.0
Designated as Hedging Instruments | Net Investment Hedge | Cross-currency swaps |  |  |  |
Derivatives not designated as hedging instruments: |  |  |  |
Total Derivative Liabilities |  | 0.0 |  | (5.3)
Non-Designated |  |  |  |
Derivatives not designated as hedging instruments: |  |  |  |
Total Derivative Assets |  | 3.4 |  | 11.4
Total Derivative Liabilities |  | (11.3) |  | (11.5)
Net Derivatives |  | (7.9) |  | (0.1)
Non-Designated | Foreign currency forward contracts |  |  |  |
Derivatives not designated as hedging instruments: |  |  |  |
Total Derivative Assets |  | 3.4 |  | 11.4
Total Derivative Liabilities |  | (11.3) |  | (11.5)
Non-Designated | Interest rate and currency swaps |  |  |  |
Derivatives not designated as hedging instruments: |  |  |  |
Total Derivative Assets |  | 0.0 |  | 0.0
Non-Designated | Cross-currency swaps |  |  |  |
Derivatives not designated as hedging instruments: |  |  |  |
Total Derivative Liabilities |  | $ 0.0 |  | $ 0.0

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