v3.26.1
income taxes - Rate reconciliations (Details) - CAD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Reconciliation of effective tax rate        
Income taxes computed at applicable statutory rates $ (503) $ (55) $ (450) $ 46
Adjustments recognized in the current period for income taxes of prior periods (15) (18) (15) (23)
Pillar Two global minimum tax 1   1 1
Impairment of intangible assets and goodwill 229 107 229 107
Write down of deferred tax asset 89   89  
(Non-taxable) non-deductible amounts, net (5) 4 (12) 3
Withholding and other taxes 5 10 13 19
Losses not recognized 38 2 39 3
Foreign tax differential (1) (2) (1) (3)
Other   (1)   1
Income tax expense (recovery) per Consolidated statements of income and other comprehensive income $ (162) $ 47 $ (107) $ 154
Reconciliation of effective tax rate (as a percent)        
Income taxes computed at applicable statutory rates (as a percent) 25.30% 27.80% 25.10% 21.90%
Adjustments recognized in the current period for income taxes of prior periods (as a percent) 0.80% 9.10% 0.80% (11.00%)
Pillar Two global minimum tax (as a percent) (0.10%)   (0.10%) 0.50%
Impairment of intangible assets and goodwill (as a percent) (11.60%) (53.90%) (12.80%) 51.00%
Write down of deferred tax asset (as a percent) (4.50%)   (5.00%)  
(Non-taxable) non-deductible amounts, net (as a percent) 0.30% (2.00%) 0.70% 1.40%
Withholding and other taxes (as a percent) (0.30%) (5.10%) (0.70%) 9.00%
Losses not recognized (as a percent) (1.90%) (1.00%) (2.10%) 1.40%
Foreign tax differential (as a percent) 0.10% 1.00% 0.10% (1.40%)
Other (as a percent)   0.40%   0.50%
Income tax expense (recovery) per Consolidated statements of income and other comprehensive income (as a percent) 8.10% (23.70%) 6.00% 73.30%