Derivative Financial Instruments and Hedging Activities - Schedule of Fair Value by Balance Sheet Location (Details) - Not Designated as Hedging Instrument - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Derivative Asset, Fair Value, Gross	$ 359.9	$ 338.8
Cash collateral	29.2	25.9
Derivative Asset, Fair Value, Gross, Total net of cash collateral	330.7	312.9
Derivative Liabilities, Fair Value, Gross	335.7	307.8
Cash collateral	16.9	24.8
Derivative Liabilities, Fair Value, Gross, Total net of cash collateral	318.8	283.0
Derivative Asset	172.8	120.9
Derivative Assets, Total net of cash collateral	143.6	95.0
Derivative Liabilities, Fair Value, Net	148.6	89.9
Derivative Liabilities, Total net of cash collateral	$ 131.7	$ 65.1