v3.26.1
Investment and other income - Gains and Losses on Asset Sales (Detail) - CAD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Other Income and Expenses [Abstract]    
Proceeds from asset sales $ 9 $ 11
Book value of asset sales 1 1
Gain (loss) on asset sales, before-tax 8 10
Gain (loss) on asset sales, after-tax $ 7 $ 9