Other Operating Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Other Income and Expenses [Abstract]
Business Promotion	$ 10.8	$ 7.9
Staff Related	2.9	6.8
FDIC Insurance Premiums	5.8	3.6
Other Intangibles Amortization	2.7	4.3
Other Expenses	57.5	49.1
Total Other Operating Expense	$ 79.7	$ 71.7