Accrued Liabilities and Other (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accrued Liabilities and Other
Payroll and employee benefits	$ 22.2	$ 29.6
Programming costs	15.9	19.3
Other accrued liabilities	14.0	9.5
Property, income, sales and use taxes	5.8	132.7
Franchise and revenue sharing fees	5.6	7.9
Customer cash collections (Transition Services Agreements)	3.6	17.5
Utility pole costs	1.6	2.2
Derivative Liability, Current, Statement of Financial Position			Accrued liabilities and other
Accrued liabilities and other	$ 68.7	$ 218.7