v3.25.4
INVESTMENTS - Narrative (Details)
6 Months Ended 12 Months Ended
Jul. 01, 2025
Jun. 30, 2025
Jun. 30, 2025
Dec. 31, 2025
Maple Leaf Sports and Entertainment Limited (MLSE)        
Disclosure of joint ventures [line items]        
Proportion of ownership interest   37.50% 37.50%  
Maple Leaf Sports and Entertainment Limited (MLSE) | Parent Company and BCE, Inc.        
Disclosure of joint ventures [line items]        
Proportion of ownership interest   75.00%    
Glentel        
Disclosure of joint ventures [line items]        
Proportion of ownership interest       50.00%
Glentel | BCE Inc.        
Disclosure of joint ventures [line items]        
Proportion of ownership interest       50.00%
Live Nation Ontario Concerts L.P        
Disclosure of joint ventures [line items]        
Proportion of ownership interest 46.00%      
York Bremner Developments Limited        
Disclosure of joint ventures [line items]        
Proportion of ownership interest 37.50%      
York Bremner Hotel Leaseholds Limited        
Disclosure of joint ventures [line items]        
Proportion of ownership interest 33.75%