Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Valuation Allowance [Line Items]
Income tax expense (benefit) recognized related to derivative securities within other comprehensive income	$ 0.9	$ 0.8	$ 0.6
Net operating loss carryforwards utilized	0.5	0.4	0.4
Tax expense recorded in connection with disposal of Affiliates	9.4	77.6	0.0
Income tax expense in discontinued operations	256.7
Reductions related to lapses of statutes of limitations	3.4	9.1	40.8
Tax expense related to GILTI tax	0.9	0.8	0.5
Liability for unrecognized tax benefits that would affect the effective tax rate if recognized	0.9	3.4
Interest and penalties related to income tax provision	(0.5)	(0.9)	(5.3)
Accrued interest and penalties relating to unrecognized tax benefits	0.1	$ 0.5	$ 1.4
Amount of decrease to unrecognized tax benefits reasonably possible within next 12 months	0.4
Federal
Valuation Allowance [Line Items]
Operating loss carryforwards	$ 0.3
Federal | Minimum
Valuation Allowance [Line Items]
Expiration period of operating loss carryforwards	3 years
Federal | Maximum
Valuation Allowance [Line Items]
Expiration period of operating loss carryforwards	5 years