v3.26.1
Employee Benefits (Summary of Remeasurement of Defined Benefit Plans) (Details) - CAD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 31, 2026
Jul. 31, 2025
Jul. 31, 2026
Jul. 31, 2025
Principal Pension Plans [Member]        
Disclosure of net defined benefit liability (asset) [line items]        
Remeasurement gain/(loss) - financial $ 106 $ 152 $ 541 $ 310
Remeasurement gain/(loss) - return on plan assets less interest income (51) (177) (472) (361)
Changes in asset limitation and minimum funding requirement (11) 0 (11) 0
Amounts Recognized in Other Comprehensive Income for Remeasurement of Defined Benefit Plans 44 (25) 58 (51)
Principal post retirement benefit plan [Member]        
Disclosure of net defined benefit liability (asset) [line items]        
Remeasurement gain/(loss) - financial 9 4 27 9
Remeasurement gain/(loss) - return on plan assets less interest income 0 0 0 0
Changes in asset limitation and minimum funding requirement 0 0 0 0
Amounts Recognized in Other Comprehensive Income for Remeasurement of Defined Benefit Plans 9 4 27 9
Other Pension Plans [Member]        
Disclosure of net defined benefit liability (asset) [line items]        
Remeasurement gain/(loss) - financial 8 4 15 8
Remeasurement gain/(loss) - return on plan assets less interest income 0 0 0 0
Changes in asset limitation and minimum funding requirement 0 0 0 0
Amounts Recognized in Other Comprehensive Income for Remeasurement of Defined Benefit Plans $ 8 $ 4 $ 15 $ 8