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Derivatives Narrative (Details)
$ in Millions
Jun. 30, 2017
USD ($)
Foreign Currency Forward & Foreign Currency Option Contracts [Member]  
Derivative Instruments and Hedging Activities Disclosures [Line Items]  
Derivative, Notional Amount $ 217.2
Debt [Member] | Interest Rate Swap [Member]  
Derivative Instruments and Hedging Activities Disclosures [Line Items]  
Derivate, Amount of Hedged Item, Through May 2018 750.0
Derivative, Amount of Hedged Item, Through May 2019 600.0
Derivative, Amount of Hedged Item, Through May 2020 450.0
Derivative, Amount of Hedged Item, Through May 2021 $ 200.0