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Derivatives Narrative (Details) $ in Millions	Mar. 31, 2019 USD ($)
Foreign Currency Forward & Foreign Currency Option Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 203.1
Interest Rate Swap [Member] \| Debt [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Amount of Hedged Item, Through May 2019	900.0
Derivative, Amount of Hedged Item, Through May 2020	750.0
Derivative, Amount of Hedged Item, Through May 2021	500.0
Derivative, Amount of Hedged Item, Through May 2022	400.0
Derivative, Amount of Hedged Item, Through May 2023	$ 400.0