Revenue from Contracts with Customers - Unsatisfied Performance Obligations Amount (Details) $ in Millions	Jun. 30, 2024 USD ($)
Business subscription services and other business services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 68.8
Business subscription services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	64.5
Other business services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 4.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01 | Residential subscription | Maximum
Unsatisfied Performance Obligations
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01 | Business subscription services and other business services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 25.1
Expected period to recognize revenue of remaining performance obligations	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01 | Business subscription services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 23.8
Expected period to recognize revenue of remaining performance obligations	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01 | Other business services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 1.3
Expected period to recognize revenue of remaining performance obligations	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Business subscription services and other business services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 29.3
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Business subscription services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 27.6
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Other business services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 1.7
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Business subscription services and other business services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 10.2
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Business subscription services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 9.3
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Other business services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 0.9
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | Business subscription services and other business services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 4.2
Expected period to recognize revenue of remaining performance obligations
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | Business subscription services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 3.8
Expected period to recognize revenue of remaining performance obligations
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | Other business services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 0.4
Expected period to recognize revenue of remaining performance obligations