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Long-lived Assets (Schedule of Changes in Carrying Amount of Goodwill) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Goodwill [Roll Forward]
Goodwill beginning balance	$ 10,477.0
Acquisitions and related adjustments	5.9
Foreign currency translation adjustments and other	(577.0)
Goodwill ending balance	9,905.9
Sunrise Holding
Goodwill [Roll Forward]
Goodwill beginning balance	7,168.7
Acquisitions and related adjustments	3.1
Foreign currency translation adjustments and other	(496.8)
Goodwill ending balance	6,675.0
Telenet
Goodwill [Roll Forward]
Goodwill beginning balance	2,976.9
Acquisitions and related adjustments	2.8
Foreign currency translation adjustments and other	(72.2)
Goodwill ending balance	2,907.5
VM Ireland
Goodwill [Roll Forward]
Goodwill beginning balance	268.1
Acquisitions and related adjustments	0.0
Foreign currency translation adjustments and other	(6.5)
Goodwill ending balance	261.6
Central and Other
Goodwill [Roll Forward]
Goodwill beginning balance	63.3
Acquisitions and related adjustments	0.0
Foreign currency translation adjustments and other	(1.5)
Goodwill ending balance	$ 61.8

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- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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