Unusual Items - Schedule of Unusual Items Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Unusual or Infrequent Item [Line Items]
Loss on debt	$ 10.5	$ 0.0	$ 0.0
Unusual Items
Unusual or Infrequent Item [Line Items]
Merger costs (component of other expense, net)	18.9	7.7	0.0
Loss on debt	10.5	0.0	0.0
Legal related matter (component of other expense, net)	0.0	0.4	0.0
Acquisition costs (component of other expense, net)	0.0	0.0	0.3
Total unusual items	$ 29.4	$ 8.1	$ 0.3