Immaterial Error Correction - Statement of Equity Adjustment (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total equity	$ 657.4	$ 651.3	$ 660.4	$ 656.9	$ 645.3	$ 641.5	$ 601.8
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total equity		654.8	663.1	659.3	647.0	643.0	602.4
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total equity		(3.5)	(2.7)	(2.4)	(1.7)	(1.5)	(0.6)
Retained Earnings
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total equity	$ 550.6	549.3	562.0	555.5	549.7	543.7	507.7
Retained Earnings | As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total equity		552.8	564.7	557.9	551.4	545.2	508.3
Retained Earnings | Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total equity		$ (3.5)	$ (2.7)	$ (2.4)	$ (1.7)	$ (1.5)	$ (0.6)