Income Taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Balance at January 1	$ 8.2	$ 7.5
Additions for tax positions of prior years	0.0	0.0
Reductions for tax positions of prior years	(0.3)	0.0
Additions based on tax positions related to current year	0.0	0.7
Reductions based on tax positions related to current year	0.0	0.0
Reductions based on settlements with taxing authorities	(2.8)	0.0
Expiration of statute of limitations	(1.5)	0.0
Balance at December 31	$ 3.6	$ 8.2