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Equity (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023 | Oct. 31, 2023 | Oct. 19, 2023
Class of Stock [Line Items] |  |  |  |
Share repurchase program, minimum repurchase requirement, percentage |  | 10.00% |  |
Stock repurchase, remaining authorized amount | $ 506.3 |  |  |
Telenet | Subsidiaries | Liberty Global Belgium Holding B.V. |  |  |  |
Class of Stock [Line Items] |  |  |  |
Interest acquired |  |  | 100.00% | 100.00%
Class C |  |  |  |
Class of Stock [Line Items] |  |  |  |
Stock repurchased (in shares) | 8,914,916 |  |  |
Average price paid per share (in dollars per share) | $ 19.12 |  |  |
Aggregate purchase price | $ 170.5 |  |  |
Stock repurchase, remaining authorized amount | 29.3 |  |  |
Class A |  |  |  |
Class of Stock [Line Items] |  |  |  |
Stock repurchase, remaining authorized amount | $ 29.3 |  |  |

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