Schedule II - Valuation and Qualifying Accounts and Reserves (Details) - SEC Schedule, 12-09, Allowance, Credit Loss [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$ 9.6	$ 6.1	$ 6.3
Additions charged to cost and expenses	0.3	8.1	4.5
Write-offs	(0.4)	(4.2)	(4.9)
Recoveries	1.2	1.2	1.6
Other	0.0	(1.6)	(1.4)
Balance at end of year	$ 10.7	$ 9.6	$ 6.1