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Consolidated statements of comprehensive income (Parenthetical) - CAD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Items that will be subsequently reclassified to net earnings                
Income tax relating to cash flow hedges $ 53 $ (70) $ 56 $ (150)        
Items that will not be reclassified to net earnings                
Income tax relating to actuarial gains (losses) of defined benefit plans (118) (30) (124) (56)        
Income tax relating to publicly-traded and privately-held investments (6) (5) (8) (5)        
Income tax relating to changes in fair value of financial liability attributable to change in credit risk of liability included in other comprehensive income $ (4) $ 10 $ (9) $ 9        
Actuarial assumption of discount rates 4.90% 4.80% 4.90% 4.80% 5.00% 4.90% 4.70% 4.70%