v3.25.4
LONG-TERM DEBT - Bank Credit and Letter of Credit Facilities (Details)
$ in Billions
 1 Months Ended 12 Months Ended
Jul. 31, 2025
CAD ($)
facility
Jul. 31, 2025
USD ($)
Jun. 30, 2025
CAD ($)
Feb. 28, 2025
CAD ($)
Feb. 29, 2024
CAD ($)
Feb. 29, 2024
USD ($)
Dec. 31, 2025
CAD ($)
Sep. 30, 2025
CAD ($)
Jul. 31, 2025
USD ($)
facility
Jul. 01, 2025
CAD ($)
Dec. 31, 2024
CAD ($)
Apr. 30, 2024
CAD ($)
Disclosure of detailed information about borrowings [line items]                        
Proceeds on issuance of long-term debt       $ 4,000,000,000.0                
Deferred government grant liability             $ 79,000,000       $ 39,000,000  
Shaw Communications Inc.                        
Disclosure of detailed information about borrowings [line items]                        
Maximum borrowing capacity             6,000,000,000          
Revolving Credit Facility                        
Disclosure of detailed information about borrowings [line items]                        
Maximum borrowing capacity             $ 4,260,000,000       4,000,000,000  
Proceeds on issuance of long-term debt $ 1,800,000,000 $ 1.3                    
Revolving Credit Facility | Bank Prime Rate or Base Rate | Minimum                        
Disclosure of detailed information about borrowings [line items]                        
Spread on variable rate             0.00%          
Revolving Credit Facility | Bank Prime Rate or Base Rate | Maximum                        
Disclosure of detailed information about borrowings [line items]                        
Spread on variable rate             1.25%          
Revolving Credit Facility | Secured Overnight Financing Rate or Canadian Overnight Repo Rate Average | Minimum                        
Disclosure of detailed information about borrowings [line items]                        
Spread on variable rate             0.85%          
Revolving Credit Facility | Secured Overnight Financing Rate or Canadian Overnight Repo Rate Average | Maximum                        
Disclosure of detailed information about borrowings [line items]                        
Spread on variable rate             2.25%          
Revolving Credit Facility, Tranche One                        
Disclosure of detailed information about borrowings [line items]                        
Maximum borrowing capacity               $ 3,000,000,000       $ 3,000,000,000
Revolving Credit Facility, Tranche Two                        
Disclosure of detailed information about borrowings [line items]                        
Maximum borrowing capacity               $ 1,000,000,000       $ 1,000,000,000
Term Loan Facilities                        
Disclosure of detailed information about borrowings [line items]                        
Maximum borrowing capacity         $ 6,000,000,000              
Repayment of long-term debt     $ 1,000,000,000   3,400,000,000              
Term Loan Facilities | Shaw Communications Inc.                        
Disclosure of detailed information about borrowings [line items]                        
Proceeds on issuance of long-term debt           $ 2.5            
Repayment of long-term debt         $ 3,400,000,000              
Unsecured Non-Revolving Credit Facility                        
Disclosure of detailed information about borrowings [line items]                        
Maximum borrowing capacity             $ 815,000,000       $ 665,000,000  
Proceeds on issuance of long-term debt             $ 134,000,000          
Interest rate             1.00%          
Deferred government grant liability             $ 79,000,000          
Non-Revolving Credit Facilities, Maturing July 2026                        
Disclosure of detailed information about borrowings [line items]                        
Maximum borrowing capacity $ 2,000,000,000               $ 1.5      
Number of facilities entered into | facility 2               2      
Non-Revolving Credit Facility, Maturing July 2026, One                        
Disclosure of detailed information about borrowings [line items]                        
Maximum borrowing capacity $ 1,000,000,000                      
Non-Revolving Credit Facility, Maturing July 2026, Two                        
Disclosure of detailed information about borrowings [line items]                        
Maximum borrowing capacity $ 1,000,000,000                      
Maple Leaf Sports & Entertainment Ltd. Revolving Credit Facility                        
Disclosure of detailed information about borrowings [line items]                        
Maximum borrowing capacity                   $ 260,000,000    
Proceeds on issuance of long-term debt             $ 115,000,000          
Maple Leaf Sports & Entertainment Ltd. Non-Revolving Credit Facility                        
Disclosure of detailed information about borrowings [line items]                        
Maximum borrowing capacity                   $ 300,000,000