Other Operating Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Other Income and Expenses [Abstract]
Business Promotion	$ 21.1	$ 18.1	$ 37.3	$ 28.9
Staff Related	8.9	6.2	16.7	9.1
FDIC Insurance Premiums	6.6	4.6	12.8	10.4
Charitable Contributions	4.3	4.6	7.5	7.1
Other Expenses	71.1	56.4	123.3	114.1
Total Other Operating Expense	$ 112.0	$ 89.9	$ 197.6	$ 169.6