v3.26.1
Segment Reporting (Narrative) (Details)
6 Months Ended
Jun. 30, 2026
Segment Reporting [Line Items]  
Number of reportable segments not disclosed flag true
VodafoneZiggo JV (nonconsolidated)  
Segment Reporting [Line Items]  
Performance measures percentage of segment revenue and operating cash flow presented 100.00%
Ownership percentage 50.00%
VMO2 JV (nonconsolidated)  
Segment Reporting [Line Items]  
Ownership percentage 50.00%