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Debt ( Component of Debt-Footnotes) (Details) | 2 Months Ended | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Feb. 29, 2024 USD ($) | Feb. 29, 2024 EUR (€) | Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($) | Mar. 31, 2024 EUR (€) | Feb. 29, 2024 EUR (€) | Dec. 31, 2023 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted average interest rate |  |  | 6.09% |  | 6.09% |  |
Unused borrowing capacity, amount |  |  | $ 1,535,400,000 |  |  |  |
Repayment of debt |  |  | 5,900,000 | $ 6,700,000 |  |  |
Deferred liabilities |  |  | 410,900,000 |  |  |  | $ 430,800,000
Long-term Debt |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Estimated fair value |  |  | $ 15,200,000,000 |  |  |  | $ 15,500,000,000
Aggregate Variable and Fixed Rate Indebtedness |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted average interest rate |  |  | 3.41% |  | 3.41% |  |
Sunrise Holding Bank Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted average interest rate |  |  | 7.70% |  | 7.70% |  |
Unused borrowing capacity, amount |  |  | $ 763,400,000 |  | € 707,000,000 |  |
Sunrise Holding Bank Facility | Sunrise Holding Revolving Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unused borrowing capacity, amount |  |  | 763,400,000 |  | 707,000,000.0 |  |
Unused borrowing capacity, amount under covenant |  |  | 763,400,000 |  | 707,000,000.0 |  |
Available to loan or distribute |  |  | 763,400,000 |  | 707,000,000.0 |  |
Sunrise Holding Bank Facility | Debt Covenant, Scenario 1 | Sunrise Holding Revolving Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unused borrowing capacity, amount |  |  | 763,400,000 |  | 707,000,000.0 |  |
Available to loan or distribute |  |  | 763,400,000 |  | 707,000,000.0 |  |
Sunrise Holding Revolving Facility B |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unused borrowing capacity, amount |  |  | 752,600,000 |  | 697,000,000 |  |
Maximum borrowing capacity |  |  | 777,400,000 |  | 720,000,000 |  |
Sunrise Holding Revolving Facility A |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unused borrowing capacity, amount | $ 64,800,000 |  | 10,800,000 |  | 10,000,000 | € 60,000,000 |
Maximum borrowing capacity | € |  |  |  |  | 10,000,000 |  |
Sunrise Holding Revolving Facility Auxillary |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unused borrowing capacity, amount |  |  | 24,800,000 |  | 23,000,000 |  |
Maximum borrowing capacity | € |  |  |  |  |  | 60,000,000 |
Sunrise Holding Revolving Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Repayment of debt | 19,400,000 | € 18,000,000 |  |  |  |  |
Sunrise Holding Revolving Facility One |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Maximum borrowing capacity | 788,200,000 |  |  |  |  | 730,000,000 |
Sunrise Holding Revolving Facility B, Auxillary |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Maximum borrowing capacity | € |  |  |  |  | 60,000,000 |  |
Telenet Revolving Credit Facility B |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unused borrowing capacity, amount |  |  | 615,400,000 |  | 570,000,000 |  |
Telenet Revolving Credit Facility A |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unused borrowing capacity, amount | $ 32,400,000 |  |  |  |  | € 30,000,000 |
Telenet Overdraft Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unused borrowing capacity, amount |  |  | 27,000,000 |  | 25,000,000 |  |
Telenet Revolving Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unused borrowing capacity, amount |  |  | $ 21,600,000 |  | € 20,000,000 |  |
VM Ireland Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted average interest rate |  |  | 7.36% |  | 7.36% |  |
Unused borrowing capacity, amount |  |  | $ 108,000,000 |  | € 100,000,000 |  |
VM Ireland Credit Facility | Sunrise Holding Revolving Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unused borrowing capacity, amount |  |  | 108,000,000.0 |  | 100,000,000.0 |  |
Unused borrowing capacity, amount under covenant |  |  | 108,000,000.0 |  | 100,000,000.0 |  |
Available to loan or distribute |  |  | 108,000,000.0 |  | 100,000,000.0 |  |
VM Ireland Credit Facility | Debt Covenant, Scenario 1 | Sunrise Holding Revolving Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unused borrowing capacity, amount |  |  | 108,000,000.0 |  | 100,000,000.0 |  |
Available to loan or distribute |  |  | $ 108,000,000.0 |  | € 100,000,000.0 |  |
Vendor financing |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted average interest rate |  |  | 4.97% |  | 4.97% |  |
Operating-related vendor financing additions |  |  | $ 159,800,000 | $ 141,400,000 |  |  |
Telenet Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted average interest rate |  |  | 6.95% |  | 6.95% |  |
Telenet Credit Facility | Sunrise Holding Revolving Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unused borrowing capacity, amount |  |  | $ 664,000,000.0 |  | € 615,000,000.0 |  |
Unused borrowing capacity, amount under covenant |  |  | 664,000,000.0 |  | 615,000,000.0 |  |
Available to loan or distribute |  |  | 664,000,000.0 |  | 615,000,000.0 |  |
Telenet Credit Facility | Debt Covenant, Scenario 1 | Sunrise Holding Revolving Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unused borrowing capacity, amount |  |  | 664,000,000.0 |  | 615,000,000.0 |  |
Available to loan or distribute |  |  | $ 664,000,000.0 |  | € 615,000,000.0 |  |

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