Revenue from Contracts with Customers - Provision for Doubtful Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue from Contracts with Customers
Period of delinquency after which Company disconnects services to customers	100 days
Change in the allowance for doubtful accounts
Balance at beginning of period	$ 4.3	$ 6.7	$ 6.4
Provision charged to expense	6.0	8.3	11.6
Accounts written off, net of recoveries	(6.0)	(10.7)	(11.3)
Balance at end of period	4.3	4.3	6.7
Amount released from reserve related to COVID-19	$ 1.6	$ 0.0	$ 0.0