XML 172 R90.htm IDEA: XBRL DOCUMENT v3.22.0.1
Impairment of assets (Details) - CAD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Disclosure of reconciliation of changes in goodwill [line items]        
Impairment of assets     $ 197 $ 472
Explanation of period over which management has projected cash flows, period     5 years  
BELL MEDIA        
Disclosure of reconciliation of changes in goodwill [line items]        
Impairment of assets $ 163 $ 452    
Cash-generating units        
Disclosure of reconciliation of changes in goodwill [line items]        
Explanation of period over which management has projected cash flows, period 5 years 5 years    
Discount rate 8.50%      
Perpetuity growth rate (2.00%)      
Recoverable amount of asset or cash-generating unit $ 235 $ 942    
Cash-generating units | Minimum        
Disclosure of reconciliation of changes in goodwill [line items]        
Discount rate   8.00%    
Perpetuity growth rate   (1.00%)    
Cash-generating units | Maximum        
Disclosure of reconciliation of changes in goodwill [line items]        
Discount rate   9.50%    
Perpetuity growth rate   0.00%    
Indefinite-Lived Intangible Assets | BELL MEDIA        
Disclosure of reconciliation of changes in goodwill [line items]        
Impairment of assets 150 $ 291    
Property, plant and equipment | BELL MEDIA        
Disclosure of reconciliation of changes in goodwill [line items]        
Impairment of assets $ 13 15    
Finite-Lived Intangible Assets | BELL MEDIA        
Disclosure of reconciliation of changes in goodwill [line items]        
Impairment of assets   $ 146