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Derivative Instruments - Foreign Currency Forward Contracts Entered into Hedge Forecasted Revenues (Details) - Designated as Hedging Instrument - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Derivatives, Fair Value [Line Items]    
Derivative, notional amount $ 3,229.7 $ 1,892.4
Euro    
Derivatives, Fair Value [Line Items]    
Derivative, notional amount 2,979.1 1,892.4
British pound    
Derivatives, Fair Value [Line Items]    
Derivative, notional amount $ 250.6 $ 0.0