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Derivatives and Hedging Activities (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |  |  |  |
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments | $ 6.3 | $ (0.8) | $ 9.0 | $ (6.4) |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position | $ 230.9 |  | $ 230.9 |  | $ 218.8

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