v3.25.4
INTANGIBLE ASSETS AND GOODWILL - Overview of methods and key assumptions used to determine recoverable amounts for CGUs (Details) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of information for cash-generating units [line items]    
Carrying value of goodwill $ 20,032 $ 16,280
Leafs    
Disclosure of information for cash-generating units [line items]    
Carrying value of goodwill 0  
Carrying value of indefinite-life intangible assets 4,160  
Raptors    
Disclosure of information for cash-generating units [line items]    
Carrying value of goodwill 0  
Carrying value of indefinite-life intangible assets 6,180  
TFC    
Disclosure of information for cash-generating units [line items]    
Carrying value of goodwill 0  
Carrying value of indefinite-life intangible assets 854  
Operating segments | Wireless    
Disclosure of information for cash-generating units [line items]    
Carrying value of goodwill 1,634 1,634
Carrying value of indefinite-life intangible assets $ 12,331  
Period of projected cash flows (years) 5 years  
Terminal growth rates (%) 2.00%  
Pre-tax discount rates (%) 7.90%  
Operating segments | Cable    
Disclosure of information for cash-generating units [line items]    
Carrying value of goodwill $ 13,617 13,677
Operating segments | Cable | Cable    
Disclosure of information for cash-generating units [line items]    
Carrying value of goodwill 13,533  
Carrying value of indefinite-life intangible assets $ 0  
Period of projected cash flows (years) 5 years  
Terminal growth rates (%) 1.00%  
Pre-tax discount rates (%) 8.00%  
Operating segments | Media    
Disclosure of information for cash-generating units [line items]    
Carrying value of goodwill $ 4,781 $ 969
Carrying value of indefinite-life intangible assets $ 11,410  
Period of projected cash flows (years) 5 years  
Terminal growth rates (%) 2.00%  
Pre-tax discount rates (%) 10.90%