Basis of Presentation and Summary of Significant Accounting Policies - Allowance for Doubtful Accounts Activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 8.4	$ 10.3	$ 14.0
Bad debt expense (benefit)	1.1	(0.5)	0.7
Acquisitions	1.0	0.1	0.7
Write-offs, net of recoveries	(0.9)	(1.6)	(4.1)
Other	(0.5)	0.1	(1.0)
Ending balance	$ 9.1	$ 8.4	$ 10.3