XML 122 R95.htm IDEA: XBRL DOCUMENT v3.25.0.1
Shareholders Capital - Additional Information (Detail) - CAD ($)
$ in Millions
 12 Months Ended
Jan. 01, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Classes Of Share Capital [Line Items]      
Number of share purchase and cancel   833,614 412,623
Percentage of share purchase and cancel   10.00%  
Purchase and cancel of shares | $   $ 75 $ 30
Share buy back tax   1 0
Decrease to share capital   $ 10 $ 0
Events After Reporting Period [Member]      
Disclosure Of Classes Of Share Capital [Line Items]      
Number of share purchase and cancel 284,701    
Purchase and cancel of shares | $ $ 23    
Top of Range [Member]      
Disclosure Of Classes Of Share Capital [Line Items]      
Number of share purchase and cancel   1,359,108