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Share Capital - Narrative (Details)
$ / shares in Units, $ in Millions
2 Months Ended 12 Months Ended
Mar. 05, 2025
$ / shares
Oct. 07, 2024
$ / shares
Feb. 28, 2024
$ / shares
Nov. 01, 2023
$ / shares
Mar. 01, 2023
$ / shares
Mar. 04, 2025
CAD ($)
$ / shares
shares
Mar. 12, 2025
Dec. 31, 2024
CAD ($)
$ / shares
shares
Mar. 08, 2024
shares
Disclosure of terms and conditions of share-based payment arrangement [line items]                  
Dividend increase percentage 4.00% 7.00% 5.00% 11.00% 6.00%        
Dividend declared (in CAD per share) | $ / shares $ 0.5875 $ 0.5625 $ 0.525 $ 0.50 $ 0.45        
Normal course issuer bid, percent of issued and outstanding shares 10.00%               10.00%
Share repurchase term             12 months    
Shares repurchased and retired (in shares) | shares           7,740,000   55,350,000  
Weighted average price per share of shares repurchased and retired (in CAD per share) | $ / shares           $ 44.11   $ 48.07  
Purchase of common shares under normal course issuer bid | $           $ 344   $ 2,700  
Stock split conversion ratio               2  
Stock options                  
Disclosure of terms and conditions of share-based payment arrangement [line items]                  
Vesting term (in years)               5 years  
Shares that may be reserved for issuance as a percentage of common shares outstanding               7.00%  
Retained earnings                  
Disclosure of terms and conditions of share-based payment arrangement [line items]                  
Purchase of common shares under normal course issuer bid | $               $ 2,414  
Bottom of range | Stock options                  
Disclosure of terms and conditions of share-based payment arrangement [line items]                  
Expiration term               5 years  
Top of range                  
Disclosure of terms and conditions of share-based payment arrangement [line items]                  
Shares authorized to be repurchased through Normal Course Issuer Bid (in shares) | shares                 180,462,858
Top of range | Stock options                  
Disclosure of terms and conditions of share-based payment arrangement [line items]                  
Expiration term               6 years