v3.24.3
Premises and Equipment - Summary of Premises and Equipment (Detail) - CAD ($)
$ in Millions
 12 Months Ended
Oct. 31, 2024
Oct. 31, 2023
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance $ 6,749  
Ending balance 6,852 $ 6,749
Land [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 140  
Ending balance 244 140
Buildings [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 605  
Ending balance 631 605
Computer equipment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 560  
Ending balance 577 560
Furniture Fixtures and Other Equipment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 285  
Ending balance 346 285
Leasehold Improvements [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 1,144  
Ending balance 1,097 1,144
Work In Progress [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 108  
Ending balance 129 108
Gross carrying amount [member] | Land [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 140 141
Additions 103  
Foreign exchange translation 1 1
Other   (2)
Ending balance 244 140
Gross carrying amount [member] | Buildings [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 1,251 1,261
Additions 77  
Transfers from work in process 5 19
Disposals (6) (53)
Foreign exchange translation 2 6
Other (4) 18
Ending balance 1,325 1,251
Gross carrying amount [member] | Computer equipment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 1,283 1,169
Additions 21 32
Transfers from work in process 240 246
Disposals (140) (216)
Foreign exchange translation 10 22
Other (3) 30
Ending balance 1,411 1,283
Gross carrying amount [member] | Furniture Fixtures and Other Equipment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 835 836
Additions 11 12
Acquisition through business combination 13  
Transfers from work in process 132 62
Disposals (82) (96)
Foreign exchange translation 3 9
Other (12) 12
Ending balance 900 835
Gross carrying amount [member] | Leasehold Improvements [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 3,007 2,845
Additions 50 29
Acquisition through business combination 59  
Transfers from work in process 102 187
Disposals (29) (78)
Foreign exchange translation 19 32
Other (39) (8)
Ending balance 3,169 3,007
Gross carrying amount [member] | Work In Progress [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 108 120
Additions 522 511
Transfers from work in process (479) (514)
Disposals   (2)
Foreign exchange translation   1
Other (22) (8)
Ending balance 129 108
Accumulated depreciation and amortisation [member] | Buildings [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance (646) (627)
Depreciation 59 51
Disposals 6 50
Foreign exchange translation 1 3
Other (6) 15
Ending balance (694) (646)
Accumulated depreciation and amortisation [member] | Computer equipment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance (723) (640)
Depreciation 249 247
Disposals 140 216
Foreign exchange translation 8 16
Other (6) 36
Ending balance (834) (723)
Accumulated depreciation and amortisation [member] | Furniture Fixtures and Other Equipment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance (550) (525)
Depreciation 73 91
Disposals 82 88
Foreign exchange translation 2 6
Other 11 16
Ending balance (554) (550)
Accumulated depreciation and amortisation [member] | Leasehold Improvements [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance (1,863) (1,656)
Depreciation 279 235
Disposals 25 70
Foreign exchange translation 7 16
Other (52) 26
Ending balance (2,072) (1,863)
Right-of-use lease assets [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 6,749  
Ending balance 6,852 6,749
Right-of-use lease assets [Member] | Buildings [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 3,744  
Ending balance 3,747 3,744
Right-of-use lease assets [Member] | Equipment [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 163  
Ending balance 81 163
Right-of-use lease assets [Member] | Gross carrying amount [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 12,834 12,419
Additions 1,312 1,049
Acquisition through business combination 298  
Disposals (422) (807)
Foreign exchange translation 96 174
Other (189) (1)
Ending balance 13,929 12,834
Right-of-use lease assets [Member] | Gross carrying amount [member] | Buildings [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 5,893 5,748
Additions 526 385
Acquisition through business combination 226  
Disposals (165) (331)
Foreign exchange translation 61 103
Other (109) (12)
Ending balance 6,432 5,893
Right-of-use lease assets [Member] | Gross carrying amount [member] | Equipment [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 317 299
Additions 2 80
Disposals   (31)
Other   (31)
Ending balance 319 317
Right-of-use lease assets [Member] | Accumulated depreciation and amortisation [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance (6,085) (5,205)
Depreciation 1,364 1,275
Disposals 307 567
Foreign exchange translation 39 72
Other (104) 100
Ending balance (7,077) (6,085)
Right-of-use lease assets [Member] | Accumulated depreciation and amortisation [member] | Buildings [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance (2,149) (1,643)
Depreciation 620 559
Disposals 54 112
Foreign exchange translation 21 31
Other (51) 28
Ending balance (2,685) (2,149)
Right-of-use lease assets [Member] | Accumulated depreciation and amortisation [member] | Equipment [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance (154) (114)
Depreciation 84 92
Disposals   31
Other   (21)
Ending balance $ (238) $ (154)