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Derivative Instruments (Cross-currency Derivative Contracts) (Details) - 3 months ended Mar. 31, 2024 € in Millions, SFr in Millions, $ in Millions | USD ($) | EUR (€) | CHF (SFr)
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Sunrise Holding | Cross-Currency Swap 1 |  |  |
Derivative [Line Items] |  |  |
Weighted average remaining life | 1 year 6 months |  |
Sunrise Holding | Cross-Currency Swap 2 |  |  |
Derivative [Line Items] |  |  |
Weighted average remaining life | 4 years 6 months |  |
Sunrise Holding | Cross-Currency Swap 3 |  |  |
Derivative [Line Items] |  |  |
Weighted average remaining life | 3 years |  |
Telenet | Cross-Currency Swap 4 |  |  |
Derivative [Line Items] |  |  |
Weighted average remaining life | 2 years 9 months 18 days |  |
Telenet | Cross-Currency Swap 5 |  |  |
Derivative [Line Items] |  |  |
Weighted average remaining life | 9 months 18 days |  |
Notional amount due from counterparty | Sunrise Holding | Cross-Currency Swap 1 |  |  |
Derivative [Line Items] |  |  |
Notional amount | $ | $ 250.0 |  |
Notional amount due from counterparty | Sunrise Holding | Cross-Currency Swap 2 |  |  |
Derivative [Line Items] |  |  |
Notional amount | $ | 4,275.0 |  |
Notional amount due from counterparty | Sunrise Holding | Cross-Currency Swap 3 |  |  |
Derivative [Line Items] |  |  |
Notional amount | € |  | € 1,952.6 |
Notional amount due from counterparty | Telenet | Cross-Currency Swap 4 |  |  |
Derivative [Line Items] |  |  |
Notional amount | $ | 3,940.0 |  |
Notional amount due from counterparty | Telenet | Cross-Currency Swap 5 |  |  |
Derivative [Line Items] |  |  |
Notional amount | € |  | 45.2 |
Notional amount due to counterparty | Sunrise Holding | Cross-Currency Swap 1 |  |  |
Derivative [Line Items] |  |  |
Notional amount | € |  | 220.6 |
Notional amount due to counterparty | Sunrise Holding | Cross-Currency Swap 2 |  |  |
Derivative [Line Items] |  |  |
Notional amount | SFr |  |  | SFr 3,912.7
Notional amount due to counterparty | Sunrise Holding | Cross-Currency Swap 3 |  |  |
Derivative [Line Items] |  |  |
Notional amount | SFr |  |  | SFr 2,176.5
Notional amount due to counterparty | Telenet | Cross-Currency Swap 4 |  |  |
Derivative [Line Items] |  |  |
Notional amount | € |  | € 3,489.6 |
Notional amount due to counterparty | Telenet | Cross-Currency Swap 5 |  |  |
Derivative [Line Items] |  |  |
Notional amount | $ | $ 50.0 |  |

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- Definition Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480237/815-40-50-5 + Details
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