Commitments and Contingencies (Narrative) (Details) SFr in Millions, € in Billions	1 Months Ended				3 Months Ended
	Jan. 31, 2023 USD ($)	Jan. 31, 2023 CHF (SFr)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 EUR (€)	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)
Loss Contingencies [Line Items]
Programming costs					$ 154,100,000	$ 145,000,000
Percentage of amounts recovered					50.00%
Percentage of net present value, cost savings					50.00%
Percentage of legal and other third party, fees					50.00%
Interkabel Acquisition
Loss Contingencies [Line Items]
Damages sought			$ 1,500,000,000	€ 1.4
Loss contingency accrual					$ 0
Swisscom MVNO Matter
Loss Contingencies [Line Items]
Damages sought	$ 98,000,000	SFr 90