v3.22.4
Change In Accounting Policy (Consolidated Statements of Changes in Shareholders' Equity) (Details) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Shareholders' equity, beginning balance [1] $ 22,744 $ 19,651 $ 18,041
Net income 5,118 4,899 [2] 3,545 [3]
Other comprehensive income (loss) 272 1,470 [3] 28 [3]
Shareholders' equity, ending balance 21,384 22,744 [1] 19,651 [1]
Accumulated other comprehensive loss [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Shareholders' equity, beginning balance [1] (2,241) (3,711) (3,739)
Other comprehensive income (loss) 272 1,470 [1] 28 [1]
Shareholders' equity, ending balance (1,969) (2,241) [1] (3,711) [1]
Accumulated other comprehensive loss [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Shareholders' equity, beginning balance     256
Retained earnings [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Shareholders' equity, beginning balance [1] 20,987 19,400 17,890
Net income 5,118 4,899 [1] 3,545 [1]
Shareholders' equity, ending balance 19,529 20,987 [1] 19,400 [1]
Retained earnings [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Shareholders' equity, beginning balance     256
Previously Reported [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Shareholders' equity, beginning balance 22,744 19,651 18,041
Net income   4,892 3,562
Other comprehensive income (loss)   1,477 11
Shareholders' equity, ending balance   22,744 19,651
Previously Reported [Member] | Accumulated other comprehensive loss [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Shareholders' equity, beginning balance (1,995) (3,472) (3,483)
Other comprehensive income (loss)   1,477 11
Shareholders' equity, ending balance   (1,995) (3,472)
Previously Reported [Member] | Retained earnings [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Shareholders' equity, beginning balance $ 20,741 19,161 17,634
Net income   4,892 3,562
Shareholders' equity, ending balance   $ 20,741 $ 19,161
[1] In the first quarter of 2022, the Company changed its method of calculating market-related values of pension assets for its defined benefit plans using a retrospective approach. Comparative figures have been restated to conform to the change in methodology. See Note 2 – Change in accounting policy for additional information.
[2] In the first quarter of 2022, the Company changed its method of calculating market-related values of pension assets for its defined benefit plans using a retrospective approach. Comparative figures have been restated to conform to the change in methodology. See Note 2 – Change in accounting policy for additional information.
[3] In the first quarter of 2022, the Company changed its method of calculating market-related values of pension assets for its defined benefit plans using a retrospective approach. Comparative figures have been restated to conform to the change in methodology. See Note 2 – Change in accounting policy for additional information.