Segment Reporting (Summary of the Impact on the Adjusted EBITDA) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Increase (decrease) to revenue	$ 0.0	$ 0.0	$ 0.0
Increase (decrease) to Adjusted EBITDA	0.0	0.0	0.0
Increase (decrease) to property and equipment additions	0.0	0.0	0.0
Central and Other
Segment Reporting Information [Line Items]
Increase (decrease) to revenue	243.9	237.5	266.7
Increase (decrease) to Adjusted EBITDA	158.5	121.7	136.4
Increase (decrease) to property and equipment additions	0.0	0.0	0.0
Intersegment eliminations
Segment Reporting Information [Line Items]
Increase (decrease) to revenue	(243.9)	(237.5)	(266.7)
Increase (decrease) to Adjusted EBITDA	(60.8)	(59.3)	(66.5)
Increase (decrease) to property and equipment additions	(60.8)	(59.3)	(66.5)
Operating Segments | Sunrise
Segment Reporting Information [Line Items]
Increase (decrease) to Adjusted EBITDA	(65.0)	(40.0)	(44.3)
Increase (decrease) to property and equipment additions	22.8	22.2	24.9
Operating Segments | Telenet
Segment Reporting Information [Line Items]
Increase (decrease) to Adjusted EBITDA	(8.8)	(8.5)	(9.6)
Increase (decrease) to property and equipment additions	27.7	27.0	30.3
Operating Segments | Ireland
Segment Reporting Information [Line Items]
Increase (decrease) to Adjusted EBITDA	(23.9)	(13.9)	(16.0)
Increase (decrease) to property and equipment additions	$ 10.3	$ 10.1	$ 11.3