Other Operating Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Other Income and Expenses [Abstract]
Business Promotion	$ 76.7	$ 65.5	$ 59.2
Staff Related	34.6	33.9	29.4
FDIC Insurance Premiums	17.8	14.6	11.8
Amortization of intangible assets	9.3	14.8	16.9
Other Expenses	220.9	170.3	229.4
Total Other Operating Expense	359.3	299.1	346.7
Noninterest expense	$ 4,982.9	$ 4,535.9	$ 4,348.2