v3.25.4
RELATED PARTY TRANSACTIONS - Subsidiaries (Details) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of subsidiaries [line items]      
Current assets $ 9,488 $ 8,373  
Cash and cash equivalents 1,344 898 $ 800
Intangible assets 28,898 17,858  
Current liabilities (15,652) (12,609)  
Revenue 21,712 20,604  
Expenses 11,892 10,987  
Net income for the year 6,906 1,734  
Net income attributable to RCI 6,894 1,734  
Net income attributable to non-controlling interest 12 0  
Cash provided by operating activities 6,059 5,680  
Cash flows used in investing activities (8,212) (4,455)  
Cash flows provided by financing activities 2,599 (1,127)  
Change in cash and cash equivalents 446 $ 98  
Backhaul Network Services Inc.      
Disclosure of subsidiaries [line items]      
Current assets 738    
Cash and cash equivalents 400    
Long-term assets 15,227    
Intangible assets 7,900    
Current liabilities (267)    
Long-term liabilities (16)    
Total net assets 15,682    
Revenue 823    
Expenses 799    
Net income for the year 24    
Net income attributable to RCI 12    
Net income attributable to non-controlling interest 12    
Cash provided by operating activities 618    
Cash flows used in investing activities (6,642)    
Cash flows provided by financing activities 6,393    
Change in cash and cash equivalents $ 369