Derivatives and Hedging Activities - Pre-tax Gains and Losses on Derivative Contracts (Details) - Not Designated as Hedging Instrument - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Fee Income on Derivatives	$ 3.1	$ 7.7
Gain (Loss) on Fair Value Hedges Recognized in Earnings	$ (0.5)	$ 1.2