Other Operating Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Other Income and Expenses [Abstract]
Business Promotion	$ 18.1	$ 8.9	$ 28.9	$ 16.8
Staff Related	6.2	9.8	9.1	16.6
FDIC Insurance Premiums	4.6	4.1	10.4	7.7
Other Intangibles Amortization	2.2	3.9	4.9	8.2
Other Expenses	58.8	40.8	116.3	89.9
Total Other Operating Expense	$ 89.9	$ 67.5	$ 169.6	$ 139.2