Derivative Instruments (Interest Rate Swap Contracts, Options and Basis Swaps) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)
Basis Swaps | Telenet
Derivative [Line Items]
Weighted average remaining life	4 months 24 days
Notional amount due from counterparty | Interest Rate Swap | Sunrise Holding
Derivative [Line Items]
Notional amount	$ 3,672.7
Weighted average remaining life	2 years 7 months 6 days
Notional amount due from counterparty | Interest Rate Swap | Telenet
Derivative [Line Items]
Notional amount	$ 2,513.3
Weighted average remaining life	4 years
Notional amount due from counterparty | Interest Rate Swap | Other
Derivative [Line Items]
Notional amount	$ 0.0
Notional amount due from counterparty | Basis Swaps | Sunrise Holding
Derivative [Line Items]
Notional amount	3,626.4
Notional amount due from counterparty | Basis Swaps | Telenet
Derivative [Line Items]
Notional amount	3,523.2
Notional amount due from counterparty | Basis Swaps | VM Ireland
Derivative [Line Items]
Notional amount	995.8
Notional amount due to counterparty | Interest Rate Swap | Sunrise Holding
Derivative [Line Items]
Notional amount	$ 3,383.6
Weighted average remaining life	2 years 7 months 6 days
Notional amount due to counterparty | Interest Rate Swap | Telenet
Derivative [Line Items]
Notional amount	$ 298.7
Weighted average remaining life	1 year 1 month 6 days
Notional amount due to counterparty | Interest Rate Swap | Other
Derivative [Line Items]
Notional amount	$ 26.2
Weighted average remaining life	1 year 8 months 12 days