v3.26.1
INTANGIBLE ASSETS - Amortization period (Details)
 12 Months Ended
Dec. 31, 2025
Telecommunications licenses, frequencies and permissions | Bottom of range  
Intangible assets  
Useful life measured as period of time, intangible assets other than goodwill 3 years
Telecommunications licenses, frequencies and permissions | Top of range  
Intangible assets  
Useful life measured as period of time, intangible assets other than goodwill 20 years
Software | Bottom of range  
Intangible assets  
Useful life measured as period of time, intangible assets other than goodwill 3 years
Software | Top of range  
Intangible assets  
Useful life measured as period of time, intangible assets other than goodwill 10 years
Brands and trademarks | Bottom of range  
Intangible assets  
Useful life measured as period of time, intangible assets other than goodwill 3 years
Brands and trademarks | Top of range  
Intangible assets  
Useful life measured as period of time, intangible assets other than goodwill 15 years
Customer relationships | Bottom of range  
Intangible assets  
Useful life measured as period of time, intangible assets other than goodwill 10 years
Customer relationships | Top of range  
Intangible assets  
Useful life measured as period of time, intangible assets other than goodwill 21 years
Other intangible assets | Bottom of range  
Intangible assets  
Useful life measured as period of time, intangible assets other than goodwill 4 years
Other intangible assets | Top of range  
Intangible assets  
Useful life measured as period of time, intangible assets other than goodwill 10 years