Revenue from Contracts with Customers - Provision for Doubtful Accounts (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Revenue from Contracts with Customers
Period of delinquency after which Company disconnects services to customers			100 days
Accounts receivable - trade, net of allowance for doubtful accounts
Accounts receivable - trade	$ 42.9	$ 45.6	$ 42.9	$ 45.6
Allowance for doubtful accounts
Balance at beginning of period	6.4	4.8	6.7	4.3
Provision charged to expense	2.1	2.9	4.8	5.5
Accounts written off, net of recoveries	(3.0)	(1.8)	(6.0)	(3.9)
Balance at end of period	5.5	5.9	5.5	5.9
Accounts receivable-trade, net of allowance for doubtful accounts	$ 37.4	$ 39.7	$ 37.4	$ 39.7	$ 38.8