Acquisition of Business - Pro Forma Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Total Revenues	$ 1,377.6	$ 1,455.4	$ 4,200.1	$ 4,406.3
Total Expenses	1,468.3	1,583.7	4,515.4	4,484.9
Net Income	(90.7)	(128.3)	(315.3)	(78.6)
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax	$ (77.0)	$ (74.1)	$ (246.9)	$ 0.1