Basis of Presentation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Proceeds from Interest Received	$ 0.6	$ (1.1)
Accounts Receivable, Allowance for Credit Loss	247.2	136.6	$ 122.3	$ 144.3
Off-Balance Sheet, Credit Loss, Liability	6.2	$ 3.4	3.8	$ 3.7
Deferred tax liability, net	0.0		(9.3)
Retained Earnings (Accumulated Deficit)	974.5		$ 1,052.6
2022 remaining	12.3
OCRI
2022 remaining	$ 1.4