Derivatives and Hedging Activities - Pre-tax Gains and Losses on Derivative Contracts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	$ (46.3)
Not Designated as Hedging Instrument
Derivative [Line Items]
Fee Income on Derivatives	5.9	$ 3.1
Gain (Loss) on Fair Value Hedges Recognized in Earnings	$ (1.7)	$ (0.5)