Supplemental Financial Data - Allowance for Credit Risks (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Feb. 07, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 14.1	$ 11.4	$ 7.6	$ 14.1
Additions charged to costs and expenses	0.7	12.3	8.1	5.4
Write-offs	(0.6)	(8.3)	(5.8)	(0.4)
Recoveries	0.2	1.4	1.8	2.5
Other	0.2	(0.3)	(0.3)	0.1
Balance at end of period	$ 14.6	$ 16.5	$ 11.4	$ 7.6