v3.22.4
Fair Value Measurement - Summary of Financial Instruments Carried On Consolidated Balance Sheet at Fair Value (Detail) - CAD ($)
$ in Millions
Jan. 31, 2023
Oct. 31, 2022
Jul. 31, 2022
Jan. 31, 2022
Oct. 31, 2021
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Deposits with banks $ 28,593 $ 32,326      
Debt securities mandatorily measured and designated at FVTPL 69,707 67,296      
Business and government 190,512 188,542      
Residential mortgages 270,909 269,706      
Debt securities measured at FVOCI 57,672 56,099      
FVO securities purchased under resale agreements 65,182 69,213      
Derivative instruments 30,425 43,035      
Obligations related to securities sold short 17,639 15,284      
Obligations related to securities sold under repurchase agreements 71,428 77,171      
Derivative instruments 39,374 52,340      
At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Deposits with banks 1,457 1,668      
Debt securities mandatorily measured and designated at FVTPL 33,699 35,624      
Business and government 772 963      
Residential mortgages 2 4      
Loans mandatorily measured at FVTPL 774 967      
Debt securities measured at FVOCI 57,162 55,577      
FVO securities purchased under resale agreements 13,107 15,587      
Derivative instruments 30,425 43,035      
Total financial assets 173,142 184,652      
Deposits and other liabilities (31,470) (27,317)      
Obligations related to securities sold short (17,639) (15,284)      
Obligations related to securities sold under repurchase agreements (4,257) (4,087)      
Derivative instruments (39,374) (52,340)      
Total financial liabilities (92,740) (99,028)      
Government issued or guaranteed [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Debt securities mandatorily measured and designated at FVTPL 26,287 28,150      
Debt securities measured at FVOCI 49,065 47,088      
Corporate equity [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Equity securities mandatorily measured at FVTPL and designated at FVOCI 36,518 32,194      
Corporate debt [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Debt securities mandatorily measured and designated at FVTPL 3,724 3,611      
Debt securities measured at FVOCI 6,577 6,967      
Mortgage and asset backed [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Debt securities mandatorily measured and designated at FVTPL 3,688 3,863      
Debt securities measured at FVOCI 1,520 1,522      
Interest rate derivatives [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Derivative instruments 7,264 8,273      
Derivative instruments (12,218) (14,384)      
Foreign exchange derivatives [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Derivative instruments 13,681 21,297      
Derivative instruments (17,930) (27,229)      
Credit derivatives [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Derivative instruments 62 59      
Derivative instruments (75) (63)      
Equity derivatives [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Derivative instruments 4,859 5,125      
Derivative instruments (6,209) (6,374)      
Precious metal and other commodity [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Derivative instruments 4,559 8,281      
Derivative instruments (2,942) (4,290)      
Level 1 of fair value hierarchy [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Debt securities mandatorily measured and designated at FVTPL 865 2,611      
Debt securities measured at FVOCI 5,555 4,888      
Derivative instruments 3,071 2,876      
Total financial assets 44,629 41,337      
Obligations related to securities sold short (6,821) (5,499)      
Derivative instruments (2,865) (3,586)      
Total financial liabilities (9,686) (9,085)      
Level 1 of fair value hierarchy [member] | Government issued or guaranteed [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Debt securities mandatorily measured and designated at FVTPL 865 2,611      
Debt securities measured at FVOCI 5,555 4,888      
Level 1 of fair value hierarchy [member] | Corporate equity [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Equity securities mandatorily measured at FVTPL and designated at FVOCI 35,138 30,962      
Level 1 of fair value hierarchy [member] | Interest rate derivatives [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Derivative instruments 3 6      
Derivative instruments (1) (1)      
Level 1 of fair value hierarchy [member] | Equity derivatives [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Derivative instruments 3,042 2,776      
Derivative instruments (2,741) (3,220)      
Level 1 of fair value hierarchy [member] | Precious metal and other commodity [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Derivative instruments 26 94      
Derivative instruments (123) (365)      
Level 2 of fair value hierarchy [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Deposits with banks 1,457 1,668      
Debt securities mandatorily measured and designated at FVTPL 32,527 32,804      
Business and government 398 276      
Residential mortgages 2 4      
Loans mandatorily measured at FVTPL 400 280      
Debt securities measured at FVOCI 51,607 50,689      
FVO securities purchased under resale agreements 13,107 15,587      
Derivative instruments 27,261 40,092      
Total financial assets 127,261 141,893      
Deposits and other liabilities (31,042) (26,908)      
Obligations related to securities sold short (10,818) (9,785)      
Obligations related to securities sold under repurchase agreements (4,257) (4,087)      
Derivative instruments (35,702) (47,168)      
Total financial liabilities (81,819) (87,948)      
Level 2 of fair value hierarchy [member] | Government issued or guaranteed [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Debt securities mandatorily measured and designated at FVTPL 25,422 25,539      
Debt securities measured at FVOCI 43,510 42,200      
Level 2 of fair value hierarchy [member] | Corporate equity [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Equity securities mandatorily measured at FVTPL and designated at FVOCI 902 773      
Level 2 of fair value hierarchy [member] | Corporate debt [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Debt securities mandatorily measured and designated at FVTPL 3,722 3,609      
Debt securities measured at FVOCI 6,577 6,967      
Level 2 of fair value hierarchy [member] | Mortgage and asset backed [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Debt securities mandatorily measured and designated at FVTPL 3,383 3,656      
Debt securities measured at FVOCI 1,520 1,522      
Level 2 of fair value hierarchy [member] | Interest rate derivatives [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Derivative instruments 7,218 8,249      
Derivative instruments (11,464) (12,850)      
Level 2 of fair value hierarchy [member] | Foreign exchange derivatives [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Derivative instruments 13,681 21,297      
Derivative instruments (17,930) (27,229)      
Level 2 of fair value hierarchy [member] | Credit derivatives [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Derivative instruments 18 14      
Derivative instruments (26) (13)      
Level 2 of fair value hierarchy [member] | Equity derivatives [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Derivative instruments 1,811 2,345      
Derivative instruments (3,463) (3,151)      
Level 2 of fair value hierarchy [member] | Precious metal and other commodity [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Derivative instruments 4,533 8,187      
Derivative instruments (2,819) (3,925)      
Level 3 of fair value hierarchy [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Total financial assets 1,252 1,422 $ 1,316 $ 1,266 $ 1,588
Total financial liabilities (1,235) (1,995) $ (1,096) $ (1,088) $ (1,009)
Level 3 of fair value hierarchy [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Debt securities mandatorily measured and designated at FVTPL 307 209      
Business and government 374 687      
Loans mandatorily measured at FVTPL 374 687      
Derivative instruments 93 67      
Total financial assets 1,252 1,422      
Deposits and other liabilities (428) (409)      
Derivative instruments (807) (1,586)      
Total financial liabilities (1,235) (1,995)      
Level 3 of fair value hierarchy [member] | Corporate equity [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Equity securities mandatorily measured at FVTPL and designated at FVOCI 478 459      
Level 3 of fair value hierarchy [member] | Corporate debt [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Debt securities mandatorily measured and designated at FVTPL 2 2      
Level 3 of fair value hierarchy [member] | Mortgage and asset backed [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Debt securities mandatorily measured and designated at FVTPL 305 207      
Level 3 of fair value hierarchy [member] | Interest rate derivatives [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Derivative instruments 43 18      
Derivative instruments (753) (1,533)      
Level 3 of fair value hierarchy [member] | Credit derivatives [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Derivative instruments 44 45      
Derivative instruments (49) (50)      
Level 3 of fair value hierarchy [member] | Equity derivatives [member] | At fair value [member]          
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items]          
Derivative instruments 6 4      
Derivative instruments $ (5) $ (3)