Investments, Debt and Equity Securities (Details) - Structured note	Sep. 30, 2023
Debt Securities, Available-for-sale [Line Items]
Proportion of debt associated with the return on the leveraged structured note	100.00%
Subsidiary \| Telenet
Debt Securities, Available-for-sale [Line Items]
Proportion of debt associated with the return on the leveraged structured note	29.16%
Subsidiary \| UPC Holding
Debt Securities, Available-for-sale [Line Items]
Proportion of debt associated with the return on the leveraged structured note	10.30%
Affiliate \| VMO2 JV
Debt Securities, Available-for-sale [Line Items]
Proportion of debt associated with the return on the leveraged structured note	57.63%
Affiliate \| VodafoneZiggo JV
Debt Securities, Available-for-sale [Line Items]
Proportion of debt associated with the return on the leveraged structured note	2.91%

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.

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+ Details