v3.24.3
Employee benefits - Pension and other post-employment benefits - Analysis of Movement in Financial Position Related to Pension and Other Post-employment Benefit Plans (Detail) - CAD ($)
$ in Millions
 12 Months Ended
Oct. 31, 2024
Oct. 31, 2023
Disclosure of net defined benefit liability (asset) [line items]    
Payments $ 675  
Defined benefit pension plans [member]    
Disclosure of net defined benefit liability (asset) [line items]    
Opening Benefit obligation at beginning of period [1] 11,727  
Opening Fair value of plan assets at beginning of period 14,368  
Closing Benefit obligation at end of period [1] 13,780 $ 11,727
Closing fair value of plan assets at end of period 17,162 14,368
Defined benefit pension plans [member] | Change in fair value of plan assets [member]    
Disclosure of net defined benefit liability (asset) [line items]    
Opening Fair value of plan assets at beginning of period [1] 14,368 15,026
Interest income [1] 818 786
Remeasurements: Return on plan assets (excluding interest income) [1] 1,991 (895)
Change in foreign currency exchange rate [1] 46 55
Contributions – Employer [1] 29 23
Contributions – Plan participant [1] 42 44
Payments [1] (675) (645)
Business combinations/Disposals [1] 561 (17)
Other [1] (18) (9)
Closing fair value of plan assets at end of period [1] 17,162 14,368
Defined benefit pension plans [member] | Change in present value of benefit obligation [member]    
Disclosure of net defined benefit liability (asset) [line items]    
Opening Benefit obligation at beginning of period [1] 11,727 11,893
Current service costs [1] 188 195
Interest expense [1] 668 624
Remeasurements: Actuarial losses (gains) from demographic assumptions [1] (167) (2)
Remeasurements: Actuarial losses (gains) from financial assumptions [1] 1,337 (480)
Remeasurements: Actuarial losses (gains) from experience adjustments [1] 2 70
Change in foreign currency exchange rate [1] 37 45
Contributions – Plan participant [1] 42 44
Payments [1] (675) (645)
Business combinations/Disposals [1] 621 (17)
Closing Benefit obligation at end of period [1] 13,780 11,727
Defined benefit pension plans [member] | Unfunded Obligation [member]    
Disclosure of net defined benefit liability (asset) [line items]    
Opening Benefit obligation at beginning of period [1] 18  
Closing Benefit obligation at end of period [1] 83 18
Defined benefit pension plans [member] | Wholly or partly funded obligation [member]    
Disclosure of net defined benefit liability (asset) [line items]    
Opening Benefit obligation at beginning of period [1] 11,709  
Closing Benefit obligation at end of period [1] 13,697 11,709
Other post employment benefit [member] | Change in fair value of plan assets [member]    
Disclosure of net defined benefit liability (asset) [line items]    
Contributions – Employer 91 80
Contributions – Plan participant 24 22
Payments (115) (102)
Other post employment benefit [member] | Change in present value of benefit obligation [member]    
Disclosure of net defined benefit liability (asset) [line items]    
Opening Benefit obligation at beginning of period 1,417 1,462
Current service costs 34 33
Past service costs (6) (2)
Interest expense 81 77
Remeasurements: Actuarial losses (gains) from demographic assumptions (60) (24)
Remeasurements: Actuarial losses (gains) from financial assumptions 132 (46)
Remeasurements: Actuarial losses (gains) from experience adjustments 8 (1)
Change in foreign currency exchange rate 3 1
Contributions – Plan participant 24 22
Payments (115) (102)
Business combinations/Disposals 121 (3)
Closing Benefit obligation at end of period 1,639 1,417
Other post employment benefit [member] | Unfunded Obligation [member]    
Disclosure of net defined benefit liability (asset) [line items]    
Opening Benefit obligation at beginning of period 1,417  
Closing Benefit obligation at end of period $ 1,639 $ 1,417
[1] For pension plans with funding deficits, the benefit obligations and fair value of plan assets as at October 31, 2024 were $929 million and $665 million, respectively (October 31, 2023 – $300 million and $106 million, respectively).