Other Operating Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Other Income and Expenses [Abstract]
Business Promotion	$ 16.2	$ 20.1	$ 53.5	$ 49.0
Staff Related	11.0	7.8	27.7	16.9
FDIC Insurance Premiums	8.3	3.7	21.1	14.1
Charitable Contributions	3.8	5.0	11.3	12.1
Other Expenses	59.2	45.4	182.5	159.5
Total Other Operating Expense	$ 98.5	$ 82.0	$ 296.1	$ 251.6