v3.22.4
Change In Accounting Policy (Consolidated Balance Sheets) (Details) - CAD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Accumulated other comprehensive loss $ (1,969) $ (2,241) [1] $ (3,711) $ (3,739)
Retained earnings $ 19,529 20,987 [1]    
Previously Reported [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Accumulated other comprehensive loss   (1,995)    
Retained earnings   $ 20,741    
[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.