v3.25.1
Intangible Assets, Net and Goodwill - Assumptions used in fair value calculations of goodwill and intangible assets (Details)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
multiple
Minimum | Cable and Sky    
Intangible Assets, Net and Goodwill    
Long-term growth rate (as a percentage) 2.00%  
Post-tax discount rate (as a percentage) 11.00%  
Pre-tax discount rate 14.00%  
Multiple of sales 1.7  
Multiple of EBITDA (as defined) 3.8  
Minimum | Cable    
Intangible Assets, Net and Goodwill    
Long-term growth rate (as a percentage)   3.70%
Post-tax discount rate (as a percentage)   11.40%
Pre-tax discount rate   13.30%
Multiple of sales   2
Multiple of EBITDA (as defined)   6.1
Maximum | Cable and Sky    
Intangible Assets, Net and Goodwill    
Long-term growth rate (as a percentage) 3.70%  
Post-tax discount rate (as a percentage) 11.30%  
Pre-tax discount rate 14.30%  
Multiple of sales 3.7  
Multiple of EBITDA (as defined) 7.9  
Maximum | Cable    
Intangible Assets, Net and Goodwill    
Long-term growth rate (as a percentage)   3.70%
Post-tax discount rate (as a percentage)   12.20%
Pre-tax discount rate   16.00%
Multiple of sales   2.8
Multiple of EBITDA (as defined)   7.4