Other Operating Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Other Income and Expenses [Abstract]
Business Promotion	$ 20.1	$ 27.2	$ 49.0	$ 44.0
Staff Related	7.8	10.3	16.9	26.9
FDIC Insurance Premiums	3.7	3.5	14.1	11.2
Other Intangibles Amortization	2.2	3.4	7.1	11.6
Other Expenses	48.2	36.8	164.5	126.7
Total Other Operating Expense	$ 82.0	$ 81.2	$ 251.6	$ 220.4