v3.24.2.u1
restructuring and other costs (Details) - CAD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Dec. 31, 2023
restructuring and other costs              
Goods and services purchased $ 42   $ 13 $ 140 $ 57    
Employee benefits expense 79   102 199 217    
Total 121   115 339 274 $ 782 $ 717
Real estate rationalization-related restructuring impairments of property, plant and equipment   $ 31 99 52    
Restructuring              
restructuring and other costs              
Goods and services purchased 41   9 138 51    
Employee benefits expense 79   95 199 143    
Total 120   104 337 194    
Other              
restructuring and other costs              
Goods and services purchased 1   4 2 6    
Employee benefits expense     7   74    
Total $ 1   $ 11 $ 2 $ 80