v3.22.4
Fair Value Measurement - Changes in Fair Value of Financial Assets and Liabilities in Level 3 (Detail) - Level 3 of fair value hierarchy [member] - CAD ($)
$ in Millions
 3 Months Ended
Jan. 31, 2023
Oct. 31, 2022
Jan. 31, 2022
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]      
Opening balance $ 1,422 $ 1,316 $ 1,588
Realized 1 3 (5)
Unrealized 35 (19) (16)
Net unrealized gains (losses) included in OCI (8) 39 64
Transfer in to Level 3   27 10
Transfer out of Level 3 (2)   (8)
Purchases/Issuances 97 153 61
Sales/Settlements (293) (97) (428)
Closing balance 1,252 1,422 1,266
Opening balance (1,995) (1,096) (1,009)
Realized 7 (13) 13
Unrealized 324 (805) (221)
Transfer out of Level 3 380 (15) 64
Purchases/Issuances (13) (117) (39)
Sales/Settlements 62 51 104
Closing balance (1,235) (1,995) (1,088)
Deposits and other liabilities [member]      
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]      
Opening balance (409) (490) (742)
Realized 7 (14) 8
Unrealized (63) 72 (156)
Transfer out of Level 3 2   2
Purchases/Issuances (9) (21) (21)
Sales/Settlements 44 44 98
Closing balance (428) (409) (811)
Interest rate derivatives [member] | Derivative liabilities [member]      
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]      
Opening balance (1,533) (556) (136)
Unrealized 387 (872) (66)
Transfer out of Level 3 378 (16) 2
Purchases/Issuances (3) (95) (16)
Sales/Settlements 18 6 3
Closing balance (753) (1,533) (213)
Interest rate derivatives [member] | Derivative Assets [member]      
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]      
Opening balance 18 16 35
Unrealized 23 (26) (11)
Transfer in to Level 3   27  
Purchases/Issuances 2 1  
Sales/Settlements     1
Closing balance 43 18 25
Credit derivatives [member] | Derivative liabilities [member]      
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]      
Opening balance (50) (47) (54)
Realized   1 5
Unrealized 1 (4) 1
Closing balance (49) (50) (48)
Credit derivatives [member] | Derivative Assets [member]      
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]      
Opening balance 45 43 49
Realized   (1) (5)
Unrealized (1) 3 (1)
Closing balance 44 45 43
Equity derivatives [member] | Derivative liabilities [member]      
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]      
Opening balance (3) (3) (77)
Unrealized (1) (1)  
Transfer out of Level 3   1 60
Purchases/Issuances (1) (1) (2)
Sales/Settlements   1 3
Closing balance (5) (3) (16)
Equity derivatives [member] | Derivative Assets [member]      
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]      
Opening balance 4 4 13
Unrealized 0   (1)
Transfer in to Level 3     10
Transfer out of Level 3 (2)   (8)
Purchases/Issuances 4   2
Closing balance 6 4 16
Corporate equity [member] | Equity securities mandatorily measured at FVTPL and designated at FVOCI [member]      
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]      
Opening balance 459 454 396
Realized 1 4  
Unrealized 9 10  
Net unrealized gains (losses) included in OCI   1 47
Purchases/Issuances 26 19 27
Sales/Settlements (17) (29) (16)
Closing balance 478 459 454
Mortgage and asset backed [member] | Debt securities mandatorily measured and designated at FVTPL [member]      
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]      
Opening balance 207 147 55
Purchases/Issuances 102 75 32
Sales/Settlements (4) (15) (1)
Closing balance 305 207 86
Corporate debt [member] | Debt securities mandatorily measured and designated at FVTPL [member]      
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]      
Opening balance 2 2 2
Closing balance 2 2 2
Business and government [member] | Loans mandatorily measured at FVTPL [member]      
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]      
Opening balance 687 650 1,038
Unrealized 4 (6) (3)
Net unrealized gains (losses) included in OCI (8) 38 17
Purchases/Issuances (37) 58  
Sales/Settlements (272) (53) (412)
Closing balance $ 374 $ 687 $ 640