Revenue from Contracts with Customers - Contract Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Costs of Obtaining Contracts with Customers
Contract liability, Beginning of period	$ 3.3	$ 2.9	$ 2.8
Deferral	11.9	12.4	8.8
Revenue recognized	(12.5)	(12.0)	(8.7)
Contract liability, End of period	2.7	3.3	2.9
Current contract liabilities	2.4	2.9
Non-current contract liabilities	0.3	0.4
Total contract liabilities	$ 2.7	$ 3.3	$ 2.9
Residential Subscription
Costs of Obtaining Contracts with Customers
Contract liability, term of contract	5 months
Business Subscription
Costs of Obtaining Contracts with Customers
Contract liability, term of contract	30 months