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v3.21.1

Basis of Presentation (Narrative) (Details) | 3 Months Ended
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Mar. 31, 2021
Telenet |
Schedule of Equity Method Investments [Line Items] |
Percentage ownership in subsidiary | 60.70%
VodafoneZiggo JV |
Schedule of Equity Method Investments [Line Items] |
Ownership percentage | 50.00%
Co-venturer ownership percentage | 50.00%

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