v3.26.1
provisions (Details)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
CAD ($)
Jun. 30, 2026
CAD ($)
provisions reconciliation    
Balance as at beginning of period $ 965 $ 961
Additions 144 325
Reversals (4) (18)
Uses (150) (324)
Interest effects 5 13
Effects of foreign exchange, net 5 8
Balance as at end of period 965 965
Current 393 393
Non-current 572 572
Total 965 965
Asset retirement obligations    
provisions reconciliation    
Balance as at beginning of period 304 301
Uses (2) (3)
Interest effects 3 7
Balance as at end of period 305 305
Current 12 12
Non-current 293 293
Total 305 305
Employee-related    
provisions reconciliation    
Balance as at beginning of period 105 110
Additions 98 208
Reversals (1) (1)
Uses (75) (190)
Effects of foreign exchange, net 1 1
Balance as at end of period 128 128
Current 124 124
Non-current 4 4
Total 128 128
Written put options and contingent consideration    
provisions reconciliation    
Balance as at beginning of period 240 233
Additions 1 3
Reversals (1) (2)
Uses (9) (9)
Interest effects 2 5
Effects of foreign exchange, net 4 7
Balance as at end of period 237 237
Current 171 171
Non-current 66 66
Total 237 237
Written put options and contingent consideration provision used shares issued (3) (3)
Regulatory    
provisions reconciliation    
Balance as at beginning of period 146 142
Additions 11 19
Uses (18) (23)
Interest effects   1
Balance as at end of period 139 139
Current 29 29
Non-current 110 110
Total 139 139
Other    
provisions reconciliation    
Balance as at beginning of period 170 175
Additions 34 95
Reversals (2) (15)
Uses (46) (99)
Balance as at end of period 156 156
Current 57 57
Non-current 99 99
Total $ 156 $ 156