Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Allowance for doubtful accounts:
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year	$ 5.4	$ 4.9	$ 4.4
Charged to Expense	2.3	3.2	2.5
Deductions	(2.0)	(2.7)	(2.5)
Balance End of Year	5.7	5.4	4.9
Allowance for doubtful accounts: | Change in Accounting Standard
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year	0.0	0.0	0.5
Balance End of Year		0.0	0.0
Deferred income tax asset valuation allowance:
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year	3.2	1.4	0.2
Additions	2.5	1.8	1.2
Deductions	0.0	0.0	0.0
Balance End of Year	$ 5.7	$ 3.2	$ 1.4