Allowance for Credit Losses (Accrued Interest) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Receivables [Abstract]
Loans and Leases	$ 203.1	$ 62.6
Debt Securities
Held to Maturity	63.2	30.4
Available for Sale	147.1	129.7
Other Financial Assets	43.8	2.3
Interest Receivable	$ 457.2	$ 225.0
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets