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Revenue Recognition and Related Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Contract assets	$ 29.7	$ 43.3
Deferred revenue	286.5	437.3
Revenue recognized	357.1
Aggregate assets associated with incremental costs to obtain a contract and contract fulfillment costs	63.4	34.8
Amortization related to contract costs	$ 81.3	$ 113.2	$ 80.2
Residential Service \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Disaggregation of Revenue [Line Items]
Contract term	12 months
Minimum \| Mobile Services
Disaggregation of Revenue [Line Items]
Contract term	1 year
Minimum \| B2B Services
Disaggregation of Revenue [Line Items]
Contract term	1 year
Maximum \| Mobile Services
Disaggregation of Revenue [Line Items]
Contract term	3 years
Maximum \| B2B Services
Disaggregation of Revenue [Line Items]
Contract term	5 years