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Consolidated statements of comprehensive income (Parenthetical) - CAD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Statement of comprehensive income [abstract]        
Income tax relating to cash flow hedges $ 29,000,000 $ (15,000,000) $ (26,000,000) $ (39,000,000)
Income tax relating to actuarial gains (losses) of defined benefit plans (95,000,000) (154,000,000) (330,000,000) (574,000,000)
Income tax relating to publicly-traded and privately-held investments (14,000,000) 0 (14,000,000) 0
Income tax relating to changes in fair value of financial liability attributable to change in credit risk of liability included in other comprehensive income $ (7,000,000) $ 3,000,000 $ (4,000,000) $ 5,000,000