Unusual Items - Schedule of Merger Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Unusual or Infrequent Item [Line Items]
Gain on legal matters and settlements	$ 2.5	$ 7.5
Legal
Unusual or Infrequent Item [Line Items]
Gain on legal matters and settlements	1.8	4.6
Employee compensation
Unusual or Infrequent Item [Line Items]
Gain on legal matters and settlements	0.3	2.1
Consulting and other professional costs
Unusual or Infrequent Item [Line Items]
Gain on legal matters and settlements	$ 0.4	$ 0.8