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Derivatives - Gross Assets and Liabilities Positions (Details) MMBTU in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) MMBTU	Dec. 31, 2019 USD ($) MMBTU
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross asset position	$ 65.3	$ 29.9
Gross liability position	49.9	29.1
Foreign Exchange Contract
Derivative
Derivative, notional amount	2,912.3	$ 1,923.3
Interest Rate Swap Contract
Derivative
Number of Interest Rate Derivatives Held		9
Derivative, notional amount	0.0	$ 585.0
Proceeds from the termination of interest rate swap agreement	$ 35.0
Commodity Contract (MMbtu)
Derivative
Derivative, nonmonetary notional amount | MMBTU	27.3	44.1

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