Bank of Montreal (BMO) 6-K 24 Aug 21 2021 Q3 BMO Financial Group Reports Third Quarter 2021 Results Financial data

Cover Page

Cover Page	9 Months Ended
	Jul. 31, 2021
Cover [Abstract]
Document Type	6-K
Amendment Flag	false
Document Period End Date	Jul. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Registrant Name	BANK OF MONTREAL /CAN/
Entity Central Index Key	0000927971
Current Fiscal Year End Date	--10-31

Consolidated Statement of Incom

Consolidated Statement of Income - CAD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jul. 31, 2021	Apr. 30, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Interest, Dividend and Fee Income
Loans	$ 3,916	$ 3,849	$ 4,204	$ 11,794	$ 13,856
Securities (Note 2)	929	1,002	1,249	2,921	3,971
Deposits with banks	50	50	49	144	343
Interest, Dividend and Fee Income	4,895	4,901	5,502	14,859	18,170
Interest Expense
Deposits	745	817	1,292	2,483	5,157
Subordinated debt	44	51	65	153	201
Other liabilities	585	578	610	1,669	2,371
Interest Expense	1,374	1,446	1,967	4,305	7,729
Net Interest Income	3,521	3,455	3,535	10,554	10,441
Non-Interest Revenue
Securities commissions and fees	264	300	260	849	789
Deposit and payment service charges	319	306	299	930	916
Trading revenues	135	47	68	394	(8)
Lending fees	348	343	309	1,047	956
Card fees	113	122	85	316	264
Investment management and custodial fees	502	476	455	1,460	1,341
Mutual fund revenues	406	396	348	1,176	1,062
Underwriting and advisory fees	411	404	287	1,073	811
Securities gains, other than trading	198	111	31	411	84
Foreign exchange gains, other than trading	41	63	21	128	89
Insurance revenues	1,137	(163)	1,321	1,718	2,035
Investments in associates and joint ventures	67	60	52	183	112
Other	100	156	118	374	308
Non-Interest Revenue	4,041	2,621	3,654	10,059	8,759
Total Revenue	7,562	6,076	7,189	20,613	19,200
Provision for Credit Losses (Note 3)	(70)	60	1,054	146	2,521
Insurance Claims, Commissions and Changes in Policy Benefit Liabilities	984	(283)	1,189	1,302	1,708
Non-Interest Expense
Employee compensation (Note 8)	2,102	2,042	1,964	6,263	5,994
Premises and equipment	829	863	785	2,496	2,348
Amortization of intangible assets	157	158	154	471	461
Travel and business development	101	97	57	264	296
Communications	63	72	71	199	233
Professional fees	140	147	135	423	396
Other (Note 12)	292	1,030	278	1,590	901
Non-Interest Expense	3,684	4,409	3,444	11,706	10,629
Income Before Provision for Income Taxes	2,964	1,890	1,502	7,459	4,342
Provision for income taxes (Note 10)	689	587	270	1,864	829
Net Income	$ 2,275	$ 1,303	$ 1,232	$ 5,595	$ 3,513
Earnings Per Share (Canadian $) (Note 9)
Basic	$ 3.42	$ 1.91	$ 1.81	$ 8.36	$ 5.18
Diluted	3.41	1.91	1.81	8.35	5.18
Common shares [member]
Earnings Per Share (Canadian $) (Note 9)
Dividends per common share	$ 1.06	$ 1.06	$ 1.06	$ 3.18	$ 3.18

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - CAD ($) $ in Millions		3 Months Ended			9 Months Ended
		Jul. 31, 2021	Apr. 30, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Statement [Line Items]
Net Income		$ 2,275	$ 1,303	$ 1,232	$ 5,595	$ 3,513
Other Comprehensive Income (Loss), net of taxes
Reclassification to earnings of (gains) in the period	[1]	(5)	(19)	(18)	(33)	(74)
Other comprehensive income net of tax OCI debt financial assets		17	(108)	123	(43)	347
Net change in unrealized gains (losses) on cash flow hedges
Gains (losses) on derivatives designated as cash flow hedges arising during the period	[2]	218	(479)	83	(392)	1,673
Reclassification to earnings of (gains) losses on derivatives designated as cash flow hedges in the period	[3]	(116)	(86)	(37)	(279)	8
Other comprehensive income net of tax cash flow hedges		102	(565)	46	(671)	1,681
Net gains (losses) on translation of net foreign operations
Unrealized gains (losses) on translation of net foreign operations		521	(1,304)	(1,180)	(1,914)	516
Unrealized gains (losses) on hedges of net foreign operations	[4]	(139)	316	206	398	(145)
Other comprehensive income, net of taxes, translation of net foreign operations		382	(988)	(974)	(1,516)	371
Items that will not be reclassified to net income
Gains (losses) on remeasurement of pension and other employee future benefit plans	[5]	54	436	(189)	765	(244)
Gains (losses) on remeasurement of own credit risk on financial liabilities designated at fair value	[6]	22	3	(330)	(220)	(49)
Unrealized gains on fair value through OCI equity securities arising during the period	[7]	7	0	0	7	0
Items that will not be reclassified to net income		83	439	(519)	552	(293)
Other Comprehensive Income (Loss), net of taxes		584	(1,222)	(1,324)	(1,678)	2,106
Total Comprehensive Income (Loss)		2,859	81	(92)	3,917	5,619
Debt securities [member]
Other Comprehensive Income (Loss), net of taxes
Unrealized gains (losses) on fair value through OCI debt securities arising during the period	[8]	$ 22	$ (89)	$ 141	$ (10)	$ 421
[1]	Net of income tax provision of $2 million, $6 million, $6 million for the three months ended, and $11 million, $23 million for the nine months ended, respectively.
[2]	Net of income tax (provision) recovery of $(72) million, $173 million, $(27) million for the three months ended, and $147 million, $(600) million for the nine months ended, respectively.
[3]	Net of income tax provision (recovery) of $41 million, $31 million, $13 million for the three months ended, and $100 million, $(3) million for the nine months ended, respectively.
[4]	Net of income tax (provision) recovery of $50 million, $(115) million, $(74) million for the three months ended, and $(145) million, $53 million for the nine months ended, respectively.
[5]	Net of income tax (provision) recovery of $(26) million, $(158) million, $65 million for the three months ended, and $(283) million, $85 million for the nine months ended, respectively.
[6]	Net of income tax (provision) recovery of $(9) million, $(1) million, $120 million for the three months ended, and $79 million, $18 million for the nine months ended, respectively.
[7]	Net of income tax (provision) recovery of $(2) million, $nil, $nil for the three months ended, and $(2) million, $nil for the nine months ended, respectively.
[8]	Net of income tax (provision) recovery of $(7) million, $32 million, $(47) million for the three months ended, and $5 million, $(147) million for the nine months ended, respectively.

Consolidated Statement of Com_2

Consolidated Statement of Comprehensive Income (Parenthetical) - CAD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jul. 31, 2021	Apr. 30, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Statement [Line Items]
Net of income tax provision, reclassification to earnings of (gains)	$ 2	$ 6	$ 6	$ 11	$ 23
Net of income tax (provision) gains on derivatives designated as cash flow hedges	(72)	173	(27)	147	(600)
Net of income tax provision (recovery), reclassification to earnings of losses on derivatives designated as cash flow hedges	41	31	13	100	(3)
Net of income tax (provision) recovery, unrealized gains on hedges of net foreign operations	50	(115)	(74)	(145)	53
Net of income tax (provision) recovery, gains (losses) on remeasurement of pension and other employee future benefit plans	(26)	(158)	65	(283)	85
Net of income tax (provision) recovery, gains (losses) on remeasurement of own credit risk on financial liabilities designated at fair value	(9)	(1)	120	79	18
Net of income tax (provision) recovery, unrealized gains on fair value through OCI equity securities arising during the period	(2)	0	0	(2)	0
Debt securities [member]
Statement [Line Items]
Net of income tax (provision), unrealized gains on fair value through OCI securities	$ (7)	$ 32	$ (47)	$ 5	$ (147)

Consolidated Balance Sheet

Consolidated Balance Sheet - CAD ($) $ in Millions	Jul. 31, 2021	Apr. 30, 2021	Oct. 31, 2020
Assets
Cash and Cash Equivalents	$ 83,825	$ 98,593	$ 57,408
Interest Bearing Deposits with Banks	8,793	8,955	9,035
Securities (Note 2)
Trading	102,169	90,566	97,834
Fair value through profit or loss	14,239	13,331	13,568
Fair value through other comprehensive income	64,553	61,172	73,407
Debt securities at amortized cost	48,727	46,744	48,466
Investments in associates and joint ventures	1,088	1,054	985
Securities, net	230,776	212,867	234,260
Securities Borrowed or Purchased Under Resale Agreements	104,738	98,327	111,878
Loans
Residential mortgages	134,374	130,529	127,024
Consumer instalment and other personal	75,092	71,918	70,148
Credit cards	7,866	7,488	7,889
Business and government	241,108	237,702	245,662
Loans gross of allowance for loan losses	458,440	447,637	450,723
Allowance for credit losses (Note 3)	(2,824)	(3,028)	(3,303)
Loans,net	455,616	444,609	447,420
Other Assets
Derivative instruments	36,331	37,998	36,815
Customers' liability under acceptances	14,263	11,952	13,493
Premises and equipment	4,266	4,298	4,183
Goodwill	5,450	5,375	6,535
Intangible assets	2,298	2,323	2,442
Current tax assets	1,145	1,141	1,260
Deferred tax assets	1,209	1,294	1,473
Other	22,648	22,107	23,059
Other assets	87,610	86,488	89,260
Total Assets	971,358	949,839	949,261
Liabilities and Equity
Deposits (Note 4)	680,553	657,201	659,034
Other Liabilities
Derivative instruments	29,167	33,218	30,375
Acceptances	14,263	11,952	13,493
Securities sold but not yet purchased	28,497	32,540	29,376
Securities lent or sold under repurchase agreements	92,990	87,703	88,658
Securitization and structured entities' liabilities	23,927	25,657	26,889
Current tax liabilities	154	193	126
Deferred tax liabilities	188	163	108
Other	36,950	38,554	36,193
Other liabilities	226,136	229,980	225,218
Subordinated debt	6,973	7,144	8,416
Equity
Contributed surplus	310	313	302
Retained earnings	34,089	32,561	30,745
Accumulated other comprehensive income	3,840	3,256	5,518
Total Equity	57,696	55,514	56,593
Total Liabilities and Equity	971,358	949,839	949,261
Preferred shares and other equity instruments [member]
Equity
Issued capital	5,848	5,848	6,598
Total Equity	5,848	5,848	6,598
Common shares [member]
Equity
Issued capital	13,609	13,536	13,430
Total Equity	$ 13,609	$ 13,536	$ 13,430

Consolidated Statement of Chang

Consolidated Statement of Changes in Equity - CAD ($) $ in Millions	Total		Share premium [member]	Retained earnings [member]	Accumulated other comprehensive income (loss) on Fair Value through OCI Debt Securities, net of taxes [member]	Accumulated other comprehensive Income (Loss) on derivatives designated as Cash Flow Hedges, net of taxes [member]	Accumulated other comprehensive income on translation of net foreign operations, net of taxes [member]	Accumulated Other Comprehensive Income (Loss) on Pension and Other Employee Future Benefit Plans, net of taxes [member]	Accumulated other comprehensive income (loss) on own credit risk on financial liabilities designated at fair value, net of taxes [member]	Total accumulated other comprehensive income [member]	Preferred shares and other equity instruments [member]	Common shares [member]
Balance at beginning of year at Oct. 31, 2019			$ 303	$ 28,725	$ 26	$ 513	$ 3,703	$ (383)	$ (130)		$ 5,348	$ 12,971
Statement [Line Items]
Issued under the Shareholder Dividend Reinvestment and Share Purchase Plan												214
Issued under the Stock Option Plan												30
Treasury shares or repurchase of common shares for cancellation												(15)
Impact from adopting IFRS 16				(59)
Net income	$ 3,513			3,513
Dividends on preferred shares and distributions payable on other equity instruments				(195)
Dividends on common shares				(2,038)
Stock option expense, net of options exercised			(1)
Gains (losses) on derivatives designated as cash flow hedges arising during the period	1,673	[1]				1,673
Unrealized gains (losses) on translation of net foreign operations	516						516
Gains (losses) on remeasurement of pension and other employee future benefit plans	(244)	[2]						(244)
Gains (losses) on remeasurement of own credit risk on financial liabilities designated at fair value	(49)	[3]							(49)
Unrealized gains (losses) on fair value through OCI debt securities arising during the period					421
Reclassification to earnings of (gains) losses on derivatives designated as cash flow hedges in the period	8	[4]				8
Unrealized gains (losses) on hedges of net foreign operations	(145)	[5]					(145)
Net premium (discount) on sale of treasury shares				(44)
Reclassification to earnings of (gains) during the period	(74)	[6]			(74)
Balance at end of year at Jul. 31, 2020	54,587		302	29,902	373	2,194	4,074	(627)	(179)	$ 5,835	5,348	13,200
Balance at beginning of year at Apr. 30, 2020			301	29,426	250	2,148	5,048	(438)	151		5,348	13,000
Statement [Line Items]
Issued under the Shareholder Dividend Reinvestment and Share Purchase Plan												214
Issued under the Stock Option Plan												1
Treasury shares or repurchase of common shares for cancellation												(15)
Net income	1,232			1,232
Dividends on preferred shares and distributions payable on other equity instruments				(73)
Dividends on common shares				(682)
Stock option expense, net of options exercised			1
Gains (losses) on derivatives designated as cash flow hedges arising during the period	83	[1]				83
Unrealized gains (losses) on translation of net foreign operations	(1,180)						(1,180)
Gains (losses) on remeasurement of pension and other employee future benefit plans	(189)	[2]						(189)
Gains (losses) on remeasurement of own credit risk on financial liabilities designated at fair value	(330)	[3]							(330)
Unrealized gains (losses) on fair value through OCI debt securities arising during the period					141
Reclassification to earnings of (gains) losses on derivatives designated as cash flow hedges in the period	(37)	[4]				(37)
Unrealized gains (losses) on hedges of net foreign operations	206	[5]					206
Net premium (discount) on sale of treasury shares				(1)
Reclassification to earnings of (gains) during the period	(18)	[6]			(18)
Balance at end of year at Jul. 31, 2020	54,587		302	29,902	373	2,194	4,074	(627)	(179)	5,835	5,348	13,200
Balance at beginning of year at Oct. 31, 2020	56,593		302	30,745	355	1,979	3,980	(638)	(158)		6,598	13,430
Statement [Line Items]
Issued under the Stock Option Plan												99
Treasury shares or repurchase of common shares for cancellation												80
Net income	5,595			5,595
Dividends on preferred shares and distributions payable on other equity instruments				(185)
Dividends on common shares				(2,058)
Stock option expense, net of options exercised			7
Gains (losses) on derivatives designated as cash flow hedges arising during the period	(392)	[1]				(392)
Unrealized gains (losses) on translation of net foreign operations	(1,914)						(1,914)
Gains (losses) on remeasurement of pension and other employee future benefit plans	765	[2]						765
Gains (losses) on remeasurement of own credit risk on financial liabilities designated at fair value	(220)	[3]							(220)
Unrealized gains (losses) on fair value through OCI debt securities arising during the period					(10)
Unrealized gains on fair value through OCI equity securities arising during the year					7
Redeemed during the period											(750)
Reclassification to earnings of (gains) losses on derivatives designated as cash flow hedges in the period	(279)	[4]				(279)
Unrealized gains (losses) on hedges of net foreign operations	398	[5]					398
Equity issue expense and premium paid on redemption of preferred shares				(6)
Net premium (discount) on sale of treasury shares				(2)
Reclassification to earnings of (gains) during the period	(33)	[6]			(33)
Other			1
Balance at end of year at Jul. 31, 2021	57,696		310	34,089	319	1,308	2,464	127	(378)	3,840	5,848	13,609
Balance at beginning of year at Apr. 30, 2021	55,514		313	32,561	295	1,206	2,082	73	(400)		5,848	13,536
Statement [Line Items]
Issued under the Stock Option Plan												40
Treasury shares or repurchase of common shares for cancellation												33
Net income	2,275			2,275
Dividends on preferred shares and distributions payable on other equity instruments				(61)
Dividends on common shares				(686)
Gains (losses) on derivatives designated as cash flow hedges arising during the period	218	[1]				218
Unrealized gains (losses) on translation of net foreign operations	521						521
Gains (losses) on remeasurement of pension and other employee future benefit plans	54	[2]						54
Gains (losses) on remeasurement of own credit risk on financial liabilities designated at fair value	22	[3]							22
Unrealized gains (losses) on fair value through OCI debt securities arising during the period					22
Unrealized gains on fair value through OCI equity securities arising during the year					7
Reclassification to earnings of (gains) losses on derivatives designated as cash flow hedges in the period	(116)	[4]				(116)
Unrealized gains (losses) on hedges of net foreign operations	(139)	[5]					(139)
Net premium (discount) on sale of treasury shares			(3)
Reclassification to earnings of (gains) during the period	(5)	[6]			(5)
Balance at end of year at Jul. 31, 2021	$ 57,696		$ 310	$ 34,089	$ 319	$ 1,308	$ 2,464	$ 127	$ (378)	$ 3,840	$ 5,848	$ 13,609
[1]	Net of income tax (provision) recovery of $(72) million, $173 million, $(27) million for the three months ended, and $147 million, $(600) million for the nine months ended, respectively.
[2]	Net of income tax (provision) recovery of $(26) million, $(158) million, $65 million for the three months ended, and $(283) million, $85 million for the nine months ended, respectively.
[3]	Net of income tax (provision) recovery of $(9) million, $(1) million, $120 million for the three months ended, and $79 million, $18 million for the nine months ended, respectively.
[4]	Net of income tax provision (recovery) of $41 million, $31 million, $13 million for the three months ended, and $100 million, $(3) million for the nine months ended, respectively.
[5]	Net of income tax (provision) recovery of $50 million, $(115) million, $(74) million for the three months ended, and $(145) million, $53 million for the nine months ended, respectively.
[6]	Net of income tax provision of $2 million, $6 million, $6 million for the three months ended, and $11 million, $23 million for the nine months ended, respectively.

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Cash Flows from Operating Activities
Net Income	$ 2,275	$ 1,232	$ 5,595	$ 3,513
Adjustments to determine net cash flows provided by (used in) operating activities
Provision on securities, other than trading	0	1	(1)	2
Net (gain) on securities, other than trading	(198)	(32)	(410)	(86)
Net (increase) in trading securities	(10,335)	(7,319)	(7,415)	(1,624)
Provision (recovery) for credit losses (Note 3)	(70)	1,054	146	2,521
Change in derivative instruments – (increase) decrease in derivative asset	2,648	5,863	1,779	(14,158)
Increase (decrease) in derivative liability	(5,367)	(6,918)	(1,683)	15,342
Amortization of premises and equipment	195	198	588	598
Amortization of other assets	32	48	110	152
Amortization of intangible assets	157	154	471	461
Write-down of goodwill	8	0	755	0
Net (increase) decrease in deferred income tax asset	91	(90)	212	132
Net increase (decrease) in deferred income tax liability	24	16	80	(1)
Net (increase) decrease in current income tax asset	53	90	(56)	(492)
Net increase (decrease) in current income tax liability	(43)	(19)	70	(9)
Change in accrued interest – decrease in interest receivable	67	242	267	319
Change in accrued interest – increase (decrease) in interest payable	(32)	14	(434)	(198)
Changes in other items and accruals, net	(2,233)	891	(549)	(5,623)
Net increase in deposits	17,752	19,630	45,947	85,368
Net (increase) decrease in loans	(8,222)	13,713	(19,737)	(20,574)
Net increase (decrease) in securities sold but not yet purchased	(4,243)	724	(159)	4,081
Net increase (decrease) in securities lent or sold under repurchase agreements	4,232	(3,645)	7,661	11,616
Net (increase) decrease in securities borrowed or purchased under resale agreements	(5,480)	(1,979)	2,972	(13,514)
Net increase (decrease) in securitization and structured entities' liabilities	(1,822)	(101)	(2,591)	191
Net Cash Provided by (Used in) Operating Activities	(10,511)	23,767	33,618	68,017
Cash Flows from Financing Activities
Net (decrease) in liabilities of subsidiaries		(5,326)		(8,113)
Proceeds from issuance of covered bonds	1,837		1,837	4,425
Redemption/buyback of covered bonds	(1,860)	(1,371)	(4,074)	(3,868)
Proceeds from issuance of subordinated debt (Note 15)	1,000	1,250	1,000	1,250
Repayment of subordinated debt (Note 4)	(1,250)		(2,250)
Redemption of preferred shares (Note 5)			(756)
Net proceeds from issuance of common shares and sale of treasury shares (Note 5)	71	(15)	172	(48)
Cash dividends and distributions paid	(755)	(516)	(2,234)	(1,974)
Repayment of lease liabilities	(82)	(82)	(244)	(250)
Net Cash (Used in) Financing Activities	(1,039)	(6,060)	(6,549)	(8,578)
Cash Flows from Investing Activities
Net (increase) decrease in interest bearing deposits with banks	300	(950)	(265)	(280)
Purchases of securities, other than trading	(14,397)	(20,449)	(38,783)	(73,897)
Maturities of securities, other than trading	7,266	5,050	21,530	12,539
Proceeds from sales of securities, other than trading	2,998	5,223	19,417	30,556
Premises and equipment – net (purchases)	(124)	(74)	(327)	(273)
Purchased and developed software – net (purchases)	(118)	(125)	(358)	(490)
Acquisitions	0	0	0	(186)
Proceeds from divestitures (Note 12)	63	0	63	0
Net Cash Provided by (Used in) Investing Activities	(4,012)	(11,325)	1,277	(32,031)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	794	(1,385)	(1,929)	379
Net increase (decrease) in Cash and Cash Equivalents	(14,768)	4,997	26,417	27,787
Cash and Cash Equivalents at Beginning of Period	98,593	71,593	57,408	48,803
Cash and Cash Equivalents at End of Period	83,825	76,590	83,825	76,590
Net cash provided by operating activities includes:
Interest paid in the period	1,373	1,974	4,679	7,905
Income taxes paid in the period	650	140	1,476	1,732
Interest received in the period	4,562	5,241	13,936	16,988
Dividends received in the period	$ 415	$ 466	$ 1,255	$ 1,289

Basis of Presentation

Basis of Presentation	9 Months Ended
	Jul. 31, 2021
Text Block [Abstract]
Basis of Presentation	Note 1: Basis of Presentation Bank of Montreal (the bank or BMO) is a chartered bank under the Bank Act (Canada) These condensed interim consolidated financial statements have been prepared in accordance with International Accounting Standard 34, Interim Financial Reporting Changes in Accounting Policy Interbank Offered Rate (IBOR) Reform Effective November 1, 2020, we early adopted the IASB’s IBOR Phase 2 amendments to IFRS 9 Financial Instruments Financial Instruments: Recognition and Measurement Financial Instruments: Disclosures Insurance Contracts Leases For financial instruments at amortized cost, the amendments introduce a practical expedient such that if a change in the contractual cash flows is as a direct consequence of IBOR reform and occurs on an economically equivalent basis, the change will be accounted for by updating the effective interest rate with no immediate gain or loss recognized. The amendments also provide additional temporary relief from applying specific IAS 39 hedge accounting requirements to hedging relationships affected by IBOR reform. For example, there is an exception from the requirement to discontinue hedge accounting as a result of changes to hedge documentation required solely by IBOR reform. As a result of the transition from IBORs to alternative reference rates (ARRs), certain benchmark rates may be subject to discontinuance, changes in methodology, increased volatility or decreased liquidity. The bank, both as a holder and an issuer of IBOR-based instruments, is exposed to increased financial, operational, legal and regulatory, and reputational risks as the rates transition. These risks arise principally from updating systems and processes to capture new ARRs, amending contracts or existing fallback clauses for new ARRs, managing the client transition to ARRs and the resulting impact on economic risk management, as well as updating hedge designations as the new ARRs emerge. In order to manage those risks, we have established an enterprise IBOR Transition Office (ITO) to coordinate and oversee the transition from IBORs to ARRs, with a focus on managing and mitigating internal risks as well as managing our client relationships. The ITO, sponsored and supported by senior management, is responsible for running the enterprise-wide program, covering all of BMO’s lines of business and corporate function areas. The ITO has a global mandate to ensure that we properly prepare for the discontinuation or unavailability of LIBOR and other IBORs. As part of its mandate, the ITO continues to address the bank’s industry and regulatory engagement, client and financial contract changes, internal and external communications, technology and operations modifications, introduction of new products, migration of existing clients, program strategy, and governance and evaluate financial reporting impacts, including for hedge accounting. In addition, the ITO continues to monitor the development and usage of ARRs across the industry, including the Alternative Reference Rate Committee’s formal recommendation of the CME Group’s forward-looking Secured Overnight Financing Rate (SOFR) Term Rates. As the market continues to develop we have begun to add ARR-based We adhered to the International Swaps and Derivatives Association Fallbacks Protocol (ISDA Protocol), which took effect on January 25, 2021. The ISDA Protocol provides specific fallbacks depending on whether the relevant IBOR (for example, USD LIBOR or GBP LIBOR) has been permanently discontinued or is temporarily unavailable. It provides an efficient amendment mechanism for mutually adhering counterparties to incorporate these fallback provisions into legacy derivative contracts. Also, we continue to incorporate contractual fallback provisions in new IBOR based cash products in order to ensure there is an alternative benchmark rate at the time of the relevant IBOR cessation. The table below presents quantitative information for financial instruments that referenced certain IBORs as at November 1, 2020, the date of adoption for Phase 2 relief, and were either due to mature after December 31, 2021 or demand facilities that will be subject to remediation to amend the benchmark interest rate. Our GBP LIBOR and other LIBOR exposures have not materially changed since November 1, 2020. (Canadian $ in millions) November 1, 2020 USD LIBOR GBP LIBOR Other (1) Non-derivative 100,521 868 1,225 Non-derivative 7,435 692 - Derivative notional amounts (3)(4) 1,570,534 20,972 6,702 Authorized and committed loan commitments (5)(6) 68,449 194 23,633 (1) Includes CHF LIBOR, EONIA and JPY LIBOR. (2) All amounts are presented based on contractual amounts outstanding with the exception of securities, in non-derivative (3) Notionals represent the amount to which a rate or price is applied in order to calculate the amount of cash that must be exchanged under the contract. Notional amounts do not represent assets or liabilities and therefore are not recorded in our Consolidated Balance Sheet. (4) Includes certain cross-currency swap positions where both the pay and receive leg currently reference an IBOR. For those derivatives, the table above includes the notional for both the pay and receive legs in the relevant columns aligning with the IBOR exposure. (5) Excludes personal lines of credit and credit cards that are unconditionally cancellable at our discretion. A large majority of these commitments expire without being drawn upon. As a result, the total contractual amounts may not be representative of the funding likely to be required for these commitments. (6) Other includes loan commitments where our customers have the option to draw from their facility in multiple currencies. Amounts drawn will be subject to prevailing interbank offered rates for the foreign currency, including those that are in scope of IBOR reform. Financial instruments that reference rates in multi-rate jurisdictions, including the Canadian Dollar Offered Rate (CDOR), the EURO Interbank Offered Rate and Australian Bank Bill Swap Rate, are excluded from the table above. In the case of CDOR, financial instruments indexed to 6-month 12-month On March 5, 2021, the Financial Conduct Authority (FCA) confirmed that LIBOR settings will cease to be provided by any administrator immediately after December 31, 2021 for all sterling, euro, Swiss franc and Japanese yen settings as well as the 1-week 2-month As a result of extending the cessation date of certain USD LIBOR settings, more contracts will expire prior to cessation and therefore the number and value of contracts that will be subject to remediation efforts has reduced. The following table presents the value of financial instruments impacted by the FCA extension as at April 30, 2023 as presented in our second quarter financial statements, that is, ones that reference USD LIBOR (with the exception of the 1 week and 2-month (Canadian $ in millions) April 30, 2021 USD LIBOR Non-derivative 75,455 Non-derivative 2,933 Derivative notional amounts (2) 1,112,747 Authorized and committed loan commitments (3)(4) 45,794 (1) All amounts are presented based on contractual amounts outstanding with the exception of securities, in non-derivative (2) Notionals represent the amount to which a rate or price is applied in order to calculate the amount of cash that must be exchanged under the contract. Notional amounts do not represent assets or liabilities and therefore are not recorded in our Consolidated Balance Sheet. (3) Excludes personal lines of credit and credit cards that are unconditionally cancellable at our discretion. A large majority of these commitments expire without being drawn upon. As a result, the total contractual amounts may not be representative of the funding likely to be required for these commitments. (4) Excludes $8,746 million of loan commitments where the customer’s option to draw in another currency impacted by IBOR reform is limited to USD. Any amounts drawn under the option will be subject to USD LIBOR, which will be impacted by the June 30, 2023 cessation date. Changes in our exposures during the third quarter ended July 31, 2021, did not result in significant changes to the risks arising from transition since we previously disclosed our IBOR exposures. In the normal course of business, our exposures may continue to fluctuate with no significant impact expected to our IBOR conversion plans. Conceptual Framework Effective November 1, 2020, we adopted the revised Conceptual Framework (Framework), which sets out the fundamental concepts for financial reporting to ensure consistency in standard-setting decisions and that similar transactions are treated in a similar way, so as to provide useful information to users of financial statements. The revised Framework had no impact on our accounting policies. Use of Estimates and Judgments The preparation of the interim consolidated financial statements requires management to use estimates and assumptions that affect the carrying amounts of certain assets and liabilities, certain amounts reported in net income and other related disclosures. The most significant assets and liabilities for which we must make estimates and judgments include the allowance for credit losses; financial instruments measured at fair value; pension and other employee future benefits; impairment of securities; income taxes and deferred tax assets; goodwill and intangible assets; insurance-related liabilities; provisions including legal proceedings and restructuring charges; leases; and transfer of financial assets and consolidation of structured entities. If actual results were to differ from the estimates, the impact would be recorded in future periods. The extent to which the COVID-19 Allowance for Credit Losses As detailed further in Note 1 of our annual consolidated financial statements for the year ended October 31, 2020, the allowance for credit losses (ACL) consists of allowances on impaired loans, which represent estimated losses related to impaired loans in the portfolio provided for but not yet written off, and allowances on performing loans, which is our best estimate of impairment in the existing portfolio for loans that have not yet been individually identified as impaired. The expected credit loss model requires the recognition of credit losses generally based on 12 months of expected losses for performing loans and the recognition of lifetime losses on performing loans that have experienced a significant increase in credit risk since origination. The determination of a significant increase in credit risk takes into account many different factors and varies by product and risk segment. The bank’s methodology for determining significant increase in credit risk is based on the change in probability of default between origination, and reporting date, assessed using probability weighted scenarios as well as certain other criteria, such as 30-day The judgments we apply in determining the ACL reflect the impact of uncertainties in the economic environment on credit conditions that may cause future assessments of credit risk to be materially different from current assessments, which could require an increase or decrease in the allowance for credit losses. Additional information regarding the allowance for credit losses is included in Note 3.

Securities

Securities	9 Months Ended
	Jul. 31, 2021
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Securities	Note 2: Securities Classification of Securities The bank’s fair value through profit or loss (FVTPL) securities of $14,239 million ($13,568 million as at October 31, 2020) are comprised of $2,788 million mandatorily measured at fair value and $11,451 million investment securities held by insurance subsidiaries designated at fair value ($2,420 million and $11,148 million, respectively, as at October 31, 2020). Our fair value through other comprehensive income (FVOCI) securities totalling $64,553 million ($73,407 million as at October 31, 2020), are net of an allowance for credit losses of $3 million ($4 million as at October 31, 2020). Amortized cost securities totalling $48,727 million ($48,466 million as at October 31, 2020), are net of an allowance for credit losses of $1 million ($1 million as at October 31, 2020). Unrealized Gains and Losses on FVOCI Securities The following table summarizes the unrealized gains and losses: (Canadian $ in millions) July 31, 2021 October 31, 2020 Cost/ Amortized cost Gross unrealized gains Gross unrealized losses Fair value Cost/ Amortized cost Gross unrealized gains Gross unrealized losses Fair value Issued or guaranteed by: Canadian federal government 14,503 124 17 14,610 22,240 211 1 22,450 Canadian provincial and municipal governments 2,630 45 1 2,674 4,628 119 - 4,747 U.S. federal government 20,183 590 77 20,696 16,881 844 31 17,694 U.S. states, municipalities and agencies 4,296 117 1 4,412 5,132 147 3 5,276 Other governments 6,520 88 11 6,597 7,222 168 9 7,381 National Housing Act (NHA) mortgage-backed securities (MBS) 1,287 13 1 1,299 1,583 46 - 1,629 U.S. agency MBS and collateralized mortgage obligations (CMO) 11,323 242 11 11,554 10,600 307 4 10,903 Corporate debt 2,561 43 6 2,598 3,153 91 10 3,234 Corporate equity 101 12 - 113 90 3 - 93 Total 63,404 1,274 125 64,553 71,529 1,936 58 73,407 Unrealized gains (losses) may be offset by related (losses) gains on hedge contracts. Interest Income on Debt Securities The following table presents interest income calculated using the effective interest method: (Canadian $ in millions) For the three months ended For the nine months ended July 31, 2021 July 31, 2020 July 31, 2021 July 31, 2020 FVOCI - Debt 114 185 366 823 Amortized cost 101 144 309 455 Total 215 329 675 1,278

Loans and Allowance for Credit

Loans and Allowance for Credit Losses	9 Months Ended
	Jul. 31, 2021
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Loans and Allowance for Credit Losses	Note 3: Loans and Allowance for Credit Losses Credit Risk Exposure The following table sets out our credit risk exposure for all loans carried at amortized cost, FVOCI or FVTPL as at July 31, 2021 and October 31, 2020. Stage 1 represents those performing loans carried with up to a 12 month expected credit loss, Stage 2 represents those performing loans carried with a lifetime expected credit loss, and Stage 3 represents those loans with a lifetime credit loss that are credit impaired. (Canadian $ in millions) July 31, 2021 October 31, 2020 Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total Loans: Residential mortgages Exceptionally low 2 - - 2 1 - - 1 Very low 91,813 417 - 92,230 79,295 429 - 79,724 Low 22,578 2,605 - 25,183 24,490 2,481 - 26,971 Medium 11,544 3,475 - 15,019 11,560 6,461 - 18,021 High 112 303 - 415 172 446 - 618 Not rated 1,088 53 - 1,141 1,132 148 - 1,280 Impaired - - 384 384 - - 409 409 Allowance for credit losses 51 37 13 101 51 75 16 142 Carrying amount 127,086 6,816 371 134,273 116,599 9,890 393 126,882 Loans: Consumer instalment and other personal Exceptionally low 1,468 28 - 1,496 1,550 31 - 1,581 Very low 29,735 28 - 29,763 26,645 37 - 26,682 Low 23,142 505 - 23,647 20,935 585 - 21,520 Medium 10,953 3,769 - 14,722 10,324 4,334 - 14,658 High 465 1,288 - 1,753 429 1,470 - 1,899 Not rated 3,363 49 - 3,412 3,372 96 - 3,468 Impaired - - 299 299 - - 340 340 Allowance for credit losses 127 362 98 587 134 429 105 668 Carrying amount 68,999 5,305 201 74,505 63,121 6,124 235 69,480 Loans: Credit cards (1) Exceptionally low 2,468 - - 2,468 2,252 - - 2,252 Very low 412 1 - 413 1,106 15 - 1,121 Low 1,636 136 - 1,772 899 148 - 1,047 Medium 1,649 725 - 2,374 1,611 899 - 2,510 High 60 297 - 357 58 377 - 435 Not rated 482 - - 482 524 - - 524 Impaired - - - - - - - - Allowance for credit losses 60 233 - 293 61 272 - 333 Carrying amount 6,647 926 - 7,573 6,389 1,167 - 7,556 Loans: Business and government (2) Acceptable Investment grade 146,024 1,515 - 147,539 129,100 3,242 - 132,342 Sub-investment 82,986 16,173 - 99,159 85,197 30,106 - 115,303 Watchlist - 6,926 - 6,926 - 8,621 - 8,621 Impaired - - 1,747 1,747 - - 2,889 2,889 Allowance for credit losses 584 832 427 1,843 510 1,044 606 2,160 Carrying amount 228,426 23,782 1,320 253,528 213,787 40,925 2,283 256,995 Commitments and financial guarantee contracts Acceptable Investment grade 148,061 1,024 - 149,085 138,141 1,628 - 139,769 Sub-investment 44,769 10,139 - 54,908 41,650 20,421 - 62,071 Watchlist - 2,979 - 2,979 - 4,861 - 4,861 Impaired - - 792 792 - - 1,261 1,261 Allowance for credit losses 209 191 24 424 211 288 12 511 Carrying amount (3)(4) 192,621 13,951 768 207,340 179,580 26,622 1,249 207,451 (1) Credit card loans are immediately written off when principal or interest payments are 180 days past due, and as a result are not reported as impaired in Stage 3. (2) Includes customers’ liability under acceptances. (3) Represents the total contractual amounts of undrawn credit facilities and other off-balance (4) Certain commercial borrower commitments are conditional and may include recourse with other parties. Certain comparative figures have been reclassified to conform with the current period’s presentation. Allowance for Credit Losses The allowance for credit losses recorded in our Consolidated Balance Sheet is maintained at a level we consider adequate to absorb credit-related losses on our loans and other credit instruments. The allowance for credit losses amounted to $3,248 million at July 31, 2021 ($3,814 million as at October 31, 2020) of which $2,824 million ($3,303 million as at October 31, 2020) was recorded in loans and $424 million ($511 million as at October 31, 2020) was recorded in other liabilities in our Consolidated Balance Sheet. Significant changes in the gross balances, including originations, maturities and repayments in the normal course of operations, impact the allowance for credit losses. The following tables show the continuity in the loss allowance by product type for the three and nine months ended July 31, 2021 and July 31, 2020. Transfers represent the amount of expected credit loss (ECL) that moved between stages during the period, for example, moving from a 12-month (Canadian $ in millions) For the three months ended July 31, 2021 July 31, 2020 Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total Loans: Residential mortgages Balance as at beginning of period 60 53 22 135 29 37 27 93 Transfer to Stage 1 14 (13 ) (1 ) - 8 (7 ) (1 ) - Transfer to Stage 2 (1 ) 3 (2 ) - (1 ) 4 (3 ) - Transfer to Stage 3 - (2 ) 2 - - (1 ) 1 - Net remeasurement of loss allowance (35 ) - 3 (32 ) 27 30 10 67 Loan originations 15 - - 15 4 - - 4 Derecognitions and maturities (2 ) (3 ) - (5 ) - (2 ) - (2 ) Model changes - - - - (1 ) (3 ) - (4 ) Total Provision for Credit Losses (PCL) (1) (9 ) (15 ) 2 (22 ) 37 21 7 65 Write-offs (2) - - (3 ) (3 ) - - (3 ) (3 ) Recoveries of previous write-offs - - 4 4 - - 2 2 Foreign exchange and other - - (3 ) (3 ) (1 ) - (6 ) (7 ) Balance as at end of period 51 38 22 111 65 58 27 150 Loans: Consumer instalment and other personal Balance as at beginning of period 141 401 101 643 116 407 125 648 Transfer to Stage 1 58 (56 ) (2 ) - 59 (57 ) (2 ) - Transfer to Stage 2 (5 ) 16 (11 ) - (10 ) 21 (11 ) - Transfer to Stage 3 (3 ) (24 ) 27 - (1 ) (27 ) 28 - Net remeasurement of loss allowance (64 ) 60 18 14 (50 ) 103 56 109 Loan originations 23 - - 23 9 - - 9 Derecognitions and maturities (8 ) (13 ) - (21 ) (4 ) (9 ) - (13 ) Model changes - - - - 11 8 - 19 Total PCL (1) 1 (17 ) 32 16 14 39 71 124 Write-offs (2) - - (55 ) (55 ) - - (81 ) (81 ) Recoveries of previous write-offs - - 24 24 - - 22 22 Foreign exchange and other - 2 (4 ) (2 ) (3 ) (3 ) (10 ) (16 ) Balance as at end of period 142 386 98 626 127 443 127 697 Loans: Credit cards Balance as at beginning of period 106 284 - 390 115 319 - 434 Transfer to Stage 1 42 (42 ) - - 50 (50 ) - - Transfer to Stage 2 (6 ) 6 - - (9 ) 9 - - Transfer to Stage 3 - (47 ) 47 - - (48 ) 48 - Net remeasurement of loss allowance (39 ) 84 2 47 (44 ) 105 20 81 Loan originations 11 - - 11 5 - - 5 Derecognitions and maturities (3 ) (7 ) - (10 ) (1 ) (7 ) - (8 ) Model changes - - - - (1 ) (10 ) - (11 ) Total PCL (1) 5 (6 ) 49 48 - (1 ) 68 67 Write-offs (2) - - (70 ) (70 ) - - (80 ) (80 ) Recoveries of previous write-offs - - 26 26 - - 19 19 Foreign exchange and other (1 ) (1 ) (5 ) (7 ) (3 ) (1 ) (7 ) (11 ) Balance as at end of period 110 277 - 387 112 317 - 429 Loans: Business and government Balance as at beginning of period 689 1,075 541 2,305 580 795 586 1,961 Transfer to Stage 1 114 (113 ) (1 ) - 45 (45 ) - - Transfer to Stage 2 (23 ) 63 (40 ) - (65 ) 66 (1 ) - Transfer to Stage 3 - (17 ) 17 - (4 ) (163 ) 167 - Net remeasurement of loss allowance (112 ) 13 12 (87 ) 145 510 134 789 Loan originations 87 - - 87 53 - - 53 Derecognitions and maturities (36 ) (72 ) - (108 ) (21 ) (36 ) - (57 ) Model changes - - - - (7 ) (4 ) - (11 ) Total PCL (1) 30 (126 ) (12 ) (108 ) 146 328 300 774 Write-offs (2) - - (101 ) (101 ) - - (300 ) (300 ) Recoveries of previous write-offs - - 13 13 - - 37 37 Foreign exchange and other 9 5 1 15 (5 ) 10 (46 ) (41 ) Balance as at end of period 728 954 442 2,124 721 1,133 577 2,431 Total as at end of period 1,031 1,655 562 3,248 1,025 1,951 731 3,707 Comprised of: Loans 822 1,464 538 2,824 813 1,719 719 3,251 Other credit instruments (3) 209 191 24 424 212 232 12 456 (1) Excludes PCL on other assets of $(4) million for the three months ended July 31, 2021 ($24 million for the three months ended July 31, 2020). (2) Generally, we continue to seek recovery on amounts that were written off during the year, unless the loan is sold, we no longer have the right to collect or we have exhausted all reasonable efforts to collect. (3) Other credit instruments, including off-balance (Canadian $ in millions) For the nine months ended July 31, 2021 July 31, 2020 Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total Loans: Residential mortgages Balance as at beginning of period 51 75 26 152 15 33 38 86 Transfer to Stage 1 48 (39 ) (9 ) - 19 (17 ) (2 ) - Transfer to Stage 2 (3 ) 20 (17 ) - (2 ) 7 (5 ) - Transfer to Stage 3 - (11 ) 11 - - (4 ) 4 - Net remeasurement of loss allowance (68 ) 5 29 (34 ) 29 47 17 93 Loan originations 28 - - 28 8 - - 8 Derecognitions and maturities (5 ) (10 ) - (15 ) (1 ) (4 ) - (5 ) Model changes - - - - (3 ) (5 ) - (8 ) Total PCL (1) - (35 ) 14 (21 ) 50 24 14 88 Write-offs (2) - - (9 ) (9 ) - - (9 ) (9 ) Recoveries of previous write-offs - - 8 8 - - 6 6 Foreign exchange and other - (2 ) (17 ) (19 ) - 1 (22 ) (21 ) Balance as at end of period 51 38 22 111 65 58 27 150 Loans: Consumer instalment and other personal Balance as at beginning of period 148 454 105 707 89 333 136 558 Transfer to Stage 1 175 (168 ) (7 ) - 138 (131 ) (7 ) - Transfer to Stage 2 (21 ) 50 (29 ) - (20 ) 66 (46 ) - Transfer to Stage 3 (6 ) (76 ) 82 - (3 ) (79 ) 82 - Net remeasurement of loss allowance (197 ) 169 77 49 (112 ) 247 162 297 Loan originations 66 - - 66 32 - - 32 Derecognitions and maturities (21 ) (37 ) - (58 ) (12 ) (27 ) - (39 ) Model changes - - - - 16 33 - 49 Total PCL (1) (4 ) (62 ) 123 57 39 109 191 339 Write-offs (2) - - (184 ) (184 ) - - (248 ) (248 ) Recoveries of previous write-offs - - 70 70 - - 64 64 Foreign exchange and other (2 ) (6 ) (16 ) (24 ) (1 ) 1 (16 ) (16 ) Balance as at end of period 142 386 98 626 127 443 127 697 Loans: Credit cards Balance as at beginning of period 110 321 - 431 80 225 - 305 Transfer to Stage 1 141 (141 ) - - 107 (107 ) - - Transfer to Stage 2 (21 ) 21 - - (25 ) 25 - - Transfer to Stage 3 (1 ) (134 ) 135 - (1 ) (129 ) 130 - Net remeasurement of loss allowance (139 ) 234 22 117 (57 ) 332 68 343 Loan originations 28 - - 28 13 - - 13 Derecognitions and maturities (6 ) (22 ) - (28 ) (3 ) (19 ) - (22 ) Model changes - - - - (1 ) (10 ) - (11 ) Total PCL (1) 2 (42 ) 157 117 33 92 198 323 Write-offs (2) - - (212 ) (212 ) - - (257 ) (257 ) Recoveries of previous write-offs - - 73 73 - - 66 66 Foreign exchange and other (2 ) (2 ) (18 ) (22 ) (1 ) - (7 ) (8 ) Balance as at end of period 110 277 - 387 112 317 - 429 Loans: Business and government Balance as at beginning of period 658 1,258 608 2,524 338 496 311 1,145 Transfer to Stage 1 385 (380 ) (5 ) - 109 (102 ) (7 ) - Transfer to Stage 2 (86 ) 138 (52 ) - (118 ) 121 (3 ) - Transfer to Stage 3 (2 ) (83 ) 85 - (6 ) (226 ) 232 - Net remeasurement of loss allowance (327 ) 268 119 60 321 883 558 1,762 Loan originations 232 - - 232 153 - - 153 Derecognitions and maturities (102 ) (165 ) - (267 ) (63 ) (86 ) - (149 ) Model changes (5 ) (19 ) - (24 ) (30 ) 8 - (22 ) Total PCL (1) 95 (241 ) 147 1 366 598 780 1,744 Write-offs (2) - - (285 ) (285 ) - - (516 ) (516 ) Recoveries of previous write-offs - - 40 40 - - 60 60 Foreign exchange and other (25 ) (63 ) (68 ) (156 ) 17 39 (58 ) (2 ) Balance as at end of period 728 954 442 2,124 721 1,133 577 2,431 Total as at end of period 1,031 1,655 562 3,248 1,025 1,951 731 3,707 Comprised of: Loans 822 1,464 538 2,824 813 1,719 719 3,251 Other credit instruments (3) 209 191 24 424 212 232 12 456 (1) Excludes PCL on other assets of $(8) million for the nine months ended July 31, 2021 ($27 million for the nine months ended July 31, 2020). (2) Generally, we continue to seek recovery on amounts that were written off during the year, unless the loan is sold, we no longer have the right to collect or we have exhausted all reasonable efforts to collect. (3) Other credit instruments, including off-balance Loans and allowance for credit losses by geographic region as at July 31, 2021 and October 31, 2020 are as follows: (Canadian $ in millions) July 31, 2021 October 31, 2020 Gross Allowance for credit losses Allowance for credit losses Net a Gross Allowance for credit losses Allowance for credit losses Net a By geographic region (1): Canada 293,558 352 1,269 291,937 276,975 303 1,323 275,349 United States 156,332 186 996 155,150 161,725 410 1,225 160,090 Other countries 8,550 - 21 8,529 12,023 14 28 11,981 Total 458,440 538 2,286 455,616 450,723 727 2,576 447,420 (1) Geographic region is based upon the country of ultimate risk. (2) Excludes allowance for credit losses on impaired loans of $24 million for other credit instruments, which is included in other liabilities ($12 million as at October 31, 2020). (3) Excludes allowance for credit losses on performing loans of $400 million for other credit instruments, which is included in other liabilities ($499 million as at October 31, 2020). Certain comparative figures have been reclassified to conform with the current period’s presentation. Impaired (Stage 3) loans, including the related allowances, as at July 31, 2021 and October 31, 2020 are as follows: (Canadian $ in millions) July 31, 2021 October 31, 2020 Gross impaired Allowance for credit losses on Net impaired Gross impaired Allowance for credit losses Net impaired Residential mortgages 384 13 371 409 16 393 Consumer instalment and other personal 299 98 201 340 105 235 Business and government (1) 1,747 427 1,320 2,889 606 2,283 Total 2,430 538 1,892 3,638 727 2,911 By geographic region (2): Canada 1,207 352 855 1,343 303 1,040 United States 1,223 186 1,037 2,211 410 1,801 Other countries - - - 84 14 70 Total 2,430 538 1,892 3,638 727 2,911 (1) Includes customers’ liability under acceptances. (2) Geographic region is based upon the country of ultimate risk. (3) Gross impaired loans and net impaired loans exclude purchased credit impaired loans. (4) Excludes allowance for credit losses on impaired loans of $24 million for other credit instruments, which is included in other liabilities ($12 million as at October 31, 2020). Loans Past Due Not Impaired Loans that are past due but not classified as impaired are loans where our customers have failed to make payments when contractually due but for which we expect the full amount of principal and interest payments to be collected, or loans which are held at fair value. The following table presents loans that are past due but not classified as impaired as at July 31, 2021 and October 31, 2020. Loans less than 30 days past due are excluded as they are not generally representative of the borrower’s ability to meet their payment obligations. (Canadian $ in millions) July 31, 2021 October 31, 2020 30 to 89 days 90 days or more Total 30 to 89 days 90 days or more Total Residential mortgages 341 16 357 543 43 586 Credit card, consumer instalment and other personal 317 64 381 345 65 410 Business and government 219 32 251 330 22 352 Total 877 112 989 1,218 130 1,348 Fully secured loans with amounts past due between 90 and 180 days that we have not classified as impaired totalled $42 million and $53 million as at July 31, 2021 and October 31, 2020, respectively. ECL Sensitivity and Key Economic Variables The expected credit loss model requires the recognition of credit losses generally based on 12 months of expected losses for performing loans and the recognition of lifetime losses on performing loans that have experienced a significant increase in credit risk since origination. The allowance for performing loans is sensitive to changes in both economic forecasts and the probability-weight assigned to each forecast scenario. Forecasts are developed internally by our Economics group, considering external data and our view of future economic conditions. We apply experienced credit judgment to reflect factors not captured in the ECL models, as we deem necessary. We have applied experienced credit judgment to reflect the impact of the extraordinary and highly uncertain environment on credit conditions and the economy as a result of the COVID-19 As at July 31, 2021, our base case scenario depicts a stronger economic forecast in both Canada and the U.S. In Canada, annual real GDP growth averages 7.3% over the next 12 months and 3.9% over the following 12 months. The U.S. economy follows a similar trajectory, but with a higher level of growth compared to Canada, given a larger policy stimulus and an initially faster vaccine rollout. Our base case economic forecast as at October 31, 2020 depicted moderate economic growth in both Canada and the U.S. over the near-term projection period. If we assumed a 100% base case economic forecast and included the impact of loan migration by restaging, with other assumptions held constant, including the application of experienced credit judgment, the allowance on performing loans would be approximately $1,850 million as at July 31, 2021 ($2,375 million as at October 31, 2020), compared to the reported allowance for performing loans of $2,686 million ($3,075 million as at October 31, 2020). As at July 31, 2021, the adverse case economic scenario depicts de minimis annual average real GDP growth in both Canada and the U.S. over the next 12 months, with both contracting at a rate of 1.1% in the following 12 months as shown in the table below. The adverse case scenario assumes a sustained and large increase in COVID-19 When we measure changes in economic performance in our forecasts, we use real GDP as the basis, which acts as the key driver for movements in many of the other economic and market variables used, including VIX equity volatility index, corporate BBB credit spreads, unemployment rates, housing price indices and consumer credit. Many of the variables have a high degree of interdependency and as such, there is no one single factor to which loan impairment allowances as a whole are sensitive. The following table shows certain key economic variables used to estimate the allowance on performing loans during the forecast period. This table is typically provided on an annual basis; however, given the continued level of uncertainty in the forward-looking information due to the impact of COVID-19, As at July 31, 2021 As at October 31, 2020 All figures are average annual values Benign scenario Base scenario Adverse scenario Benign scenario Base scenario Adverse scenario First 12 Second 12 First 12 Second 12 First 12 Second 12 First 12 Second 12 First 12 Second 12 First 12 Second 12 Real GDP growth rates (1) Canada 9.6% 5.5% 7.3% 3.9% 0.7% (1.1)% 3.7% 6.4% 1.8% 4.2% (4.4)% (1.1)% United States 10.9% 4.6% 8.7% 3.3% 0.1% (1.1)% 1.6% 6.0% (0.4)% 4.0% (5.1)% (1.2)% Corporate BBB 10-year Canada 1.5% 1.9% 1.9% 2.2% 3.6% 4.4% 1.8% 1.9% 2.2% 2.2% 3.6% 4.5% United States 1.0% 1.2% 1.3% 1.6% 4.2% 4.5% 1.7% 1.7% 2.0% 2.0% 3.9% 4.1% Unemployment rates Canada 5.9% 4.8% 7.1% 5.8% 11.2% 13.1% 7.4% 6.1% 8.9% 7.5% 12.7% 13.9% United States 4.3% 3.2% 4.9% 3.7% 9.1% 11.6% 6.4% 4.8% 8.0% 6.0% 11.5% 12.8% Housing Price Index (1) Canada (2) 24.0% 10.9% 20.9% 6.0% (8.6)% (18.0)% 10.3% 7.7% 7.2% 2.8% (1.2)% (8.7)% United States (3) 13.8% 7.0% 11.5% 4.5% (7.4)% (15.5)% 4.6% 4.5% 2.4% 2.1% (2.4)% (6.2)% (1) Real gross domestic product and housing price index are year-over-year growth rates. (2) In Canada, we use the HPI Benchmark Composite. (3) In the United States, we use the National Case-Shiller House Price Index. The ECL approach requires the recognition of credit losses generally based on 12 months of expected losses for performing loans (Stage 1) and the recognition of lifetime expected losses for performing loans that have experienced a significant increase in credit risk since origination (Stage 2). Under our current probability-weighted scenarios and based on the current risk profile of our loan exposures, if all our performing loans were in Stage 1, our allowance for performing loans would be approximately $1,925 million ($2,300 million as at October 31, 2020), compared with the reported allowance for performing loans of $2,686 million ($3,075 million as at October 31, 2020).

Deposits and Subordinated Debt

Deposits and Subordinated Debt	9 Months Ended
	Jul. 31, 2021
Text Block [Abstract]
Deposits and Subordinated Debt	Note 4: Deposits and Subordinated Debt Deposits Payable on demand Payable Payable on (Canadian $ in millions) Interest bearing Non-interest after notice a fixed date (4)(5) Total July 31, October 31, July 31, October 31, July 31, October 31, July 31, October 31, July 31, October 31, Deposits by: Banks (1) 5,830 3,594 1,998 2,460 769 1,231 20,630 31,540 29,227 38,825 Business and government 50,810 44,111 50,659 44,258 144,468 124,813 188,817 187,497 434,754 400,679 Individuals 4,934 4,661 35,927 30,369 117,314 111,905 58,397 72,595 216,572 219,530 Total (2) (3) 61,574 52,366 88,584 77,087 262,551 237,949 267,844 291,632 680,553 659,034 Booked in: Canada 52,667 41,855 79,560 67,873 126,999 112,543 163,465 185,655 422,691 407,926 United States 8,594 8,818 8,959 9,170 134,231 124,129 75,851 78,175 227,635 220,292 Other countries 313 1,693 65 44 1,321 1,277 28,528 27,802 30,227 30,816 Total 61,574 52,366 88,584 77,087 262,551 237,949 267,844 291,632 680,553 659,034 (1) Includes regulated and central banks. (2) Includes structured notes and metals deposits designated at FVTPL (Note 6). (3) Included in deposits as at July 31, 2021 and October 31, 2020 are $340,368 million and $322,951 million, respectively, of deposits denominated in U.S. dollars, and $28,815 million and $32,254 million, respectively, of deposits denominated in other foreign currencies. (4) Includes $31,727 million of senior unsecured debt as at July 31, 2021 subject to the Bank Recapitalization (Bail-In) Bail-In non-viable. (5) Deposits totalling $21,108 million as at July 31, 2021 ($27,353 million as at October 31, 2020) can be early redeemed (either fully or partially) by customers without penalty. As we do not expect a significant amount to be redeemed before maturity, we have classified them as payable on a fixed date. The following table presents deposits payable on a fixed date and greater than one hundred thousand dollars: (Canadian $ in millions) Canada United States Other Total As at July 31, 2021 140,159 71,589 28,526 240,274 As at October 31, 2020 158,475 72,186 27,799 258,460 The following table presents the maturity schedule for deposits payable on a fixed date and greater than one hundred thousand dollars, which are booked in Canada: (Canadian $ in millions) Less than 3 months 3 to 6 months 6 to 12 months Over 12 months Total As at July 31, 2021 22,423 13,274 23,840 80,622 140,159 As at October 31, 2020 18,081 29,679 28,109 82,606 158,475 Subordinated Debt On July 22, 2021, we issued $1,000 million of 1.928% non-viability contingent capital (NVCC) subordinated notes under our Canadian Medium-Term Note Program. The Series K Medium-Term Notes are due July 22, 2031. The notes reset to a floating rate on July 22, 2026. On June 1, 2021, we redeemed all of our $1,250 million 3.32% Series I Medium-Term Notes First Tranche (NVCC), at a redemption price of 100 percent of the principal amount plus unpaid accrued interest to, but excluding, the redemption date. On December 8, 2020, we redeemed all of our outstanding $1,000 million, Series H Medium-Term Notes Second Tranche (NVCC), at a redemption price of 100 percent of the principal amount plus unpaid accrued interest to, but excluding, the redemption date.

Equity

Equity	9 Months Ended
	Jul. 31, 2021
Text Block [Abstract]
Equity	Note 5: Equity Preferred and Common Shares Outstanding and Other Equity Instruments (1) (Canadian $ in millions, except as noted) July 31, 2021 October 31, 2020 Number of Amount Number of Amount Convertible into... Preferred Shares - Classified as Equity Class B – Series 25 9,425,607 236 9,425,607 236 Class B - Series 26 (2) Class B – Series 26 2,174,393 54 2,174,393 54 Class B - Series 25 (2) Class B – Series 27 20,000,000 500 20,000,000 500 Class B - Series 28 (2)(3) Class B – Series 29 16,000,000 400 16,000,000 400 Class B - Series 30 (2)(3) Class B – Series 31 12,000,000 300 12,000,000 300 Class B - Series 32 (2)(3) Class B – Series 33 8,000,000 200 8,000,000 200 Class B - Series 34 (2)(3) Class B – Series 35 - - 6,000,000 150 Not convertible (8) Class B – Series 36 - - 600,000 600 Class B - Series 37 (8) Class B – Series 38 24,000,000 600 24,000,000 600 Class B - Series 39 (2)(3) Class B – Series 40 20,000,000 500 20,000,000 500 Class B - Series 41 (2)(3) Class B – Series 42 16,000,000 400 16,000,000 400 Class B - Series 43 (2)(3) Class B – Series 44 16,000,000 400 16,000,000 400 Class B - Series 45 (2)(3) Class B – Series 46 14,000,000 350 14,000,000 350 Class B - Series 47 (2)(3) Preferred Shares - Classified as Equity 3,940 4,690 Other Equity Instruments 4.8% Additional Tier 1 Capital Notes (AT1 Notes) 658 658 Common shares (3) 4.3% Limited Recourse Capital Notes, Series 1 (LRCNs) 1,250 1,250 Common shares (3)(4) Other Equity Instruments 1,908 1,908 Preferred Shares and Other Equity Instruments 5,848 6,598 Common Shares (5) (6) (7) 648,094,938 13,609 645,889,396 13,430 (1) For additional information refer to Notes 16 and 20 of our annual consolidated financial statements for the year ended October 31, 2020. (2) If converted, the holders have the option to convert back to the original preferred shares on subsequent redemption dates. (3) The instruments issued include a NVCC provision, which is necessary for the preferred shares, AT1 Notes and by virtue of the recourse to Preferred Shares Series 48, the LRCNs (see (4) below) to qualify as regulatory capital under Basel III. As such, they are convertible into a variable number of our common shares if OSFI announces that the bank is, or is about to become, non-viable non-viability. (4) Non-deferrable Non-payment (5) The stock options issued under the Stock Option Plan are convertible into 6,077,912 common shares as at July 31, 2021 (6,446,110 common shares as at October 31, 2020). (6) During the three and nine months ended July 31, 2021, we did not issue common shares under the Shareholder Dividend Reinvestment and Share Purchase Plan and we issued 503,580 and 1,330,160 common shares, respectively, under the Stock Option Plan. (7) Common shares are net of 222,652 treasury shares as at July 31, 2021 (652,730 treasury shares as at October 31, 2020). (8) Series 35 and Series 36 were redeemed and final dividends were paid on November 25, 2020. Other Equity Instruments The bank’s US$500 million (CAD $658 million) 4.8% Additional Tier 1 Capital Notes (AT1 Notes) and $1,250 million 4.3% Limited Recourse Capital Notes Series 1 (LRCNs) are classified as equity and form part of our additional Tier 1 non-viability contingent capital. Both the AT1 Notes and LRCNs are compound financial instruments that have both equity and liability features. On the date of issuance, we assigned an insignificant value to the liability components of both instruments and, as a result, the full amount of proceeds has been classified as equity. Semi-annual distributions on the AT1 Notes and LRCNs are recognized as a reduction in equity when payable. The AT1 Notes and LRCNs are subordinate to the claims of the depositors and certain other creditors in right of payment. Preferred Shares On July 16, 2021, we announced our intention to redeem all of our 9,425,607 outstanding Non-Cumulative 5 Year Rate Reset Class B Preferred Shares, Series 25 for an aggregate total of approximately $236 million and all of our 2,174,393 outstanding Non-Cumulative Floating Rate Class B Preferred Shares, Series 26 for an aggregate total of approximately $54 million on August 25, 2021. On November 25, 2020, we redeemed all of our 6 million issued and outstanding Non-Cumulative Non-Cumulative 5-Year Normal Course Issuer Bid Our previous normal course issuer bid (NCIB) expired on June 2, 2020. Our plan, subject to approval of OSFI and the Toronto Stock Exchange, was to establish a new NCIB over a 12-month Shareholder Dividend Reinvestment and Share Purchase Plan Until further notice, common shares under the Shareholder Dividend Reinvestment and Share Purchase Plan are purchased on the open market without a discount.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Jul. 31, 2021
Text Block [Abstract]
Fair Value of Financial Instruments	Note 6: Fair Value of Financial Instruments Fair Value of Financial Instruments Not Carried at Fair Value on the Balance Sheet Set out in the following table are the amounts that would be reported if all financial assets and liabilities not currently carried at fair value were reported at their fair values. Refer to Note 17 to our annual consolidated financial statements for the year ended October 31, 2020 for further discussion on the determination of fair value. (Canadian $ in millions) July 31, 2021 October 31, 2020 Carrying value Fair value Carrying value Fair value Securities (1) Amortized cost 48,727 49,105 48,466 49,009 Loans (1) Residential mortgages 134,273 134,914 126,882 128,815 Consumer instalment and other personal 74,505 74,945 69,480 70,192 Credit cards 7,573 7,573 7,556 7,556 Business and government (2) 232,459 233,753 238,239 239,929 448,810 451,185 442,157 446,492 Deposits (3) 658,175 659,636 640,961 643,156 Securitization and structured entities’ liabilities (4) 23,298 23,709 26,889 27,506 Subordinated debt 6,973 7,275 8,416 8,727 This table excludes financial instruments with a carrying value approximating fair value, such as cash and cash equivalents, interest bearing deposits with banks, securities borrowed or purchased under resale agreements, customers’ liability under acceptances, other assets, acceptances, securities lent or sold under repurchase agreements and other liabilities. (1) Carrying value is net of allowances for credit losses. (2) Excludes $6,738 million of loans classified as FVTPL and $140 million of loans classified as FVOCI as at July 31, 2021, respectively ($5,306 million and $51 million, respectively, as at October 31, 2020). (3) Excludes $22,085 million of structured note liabilities ($18,073 million as at October 31, 2020) and $293 million of metals deposits ($nil as at October 31, 2020) designated at FVTPL. (4) Excludes $629 million of securitization and structured entities’ liabilities classified at FVTPL ($nil as at October 31, 2020). Certain comparative figures have been reclassified to conform with the current period’s presentation. Fair Value Hierarchy We use a fair value hierarchy to categorize financial instruments according to the inputs we use in valuation techniques to measure fair value. Valuation Techniques and Significant Inputs We determine the fair value of publicly traded fixed maturity debt and equity securities using quoted prices in active markets (Level 1) when these are available. When quoted prices in active markets are not available, we determine the fair value of financial instruments using models such as discounted cash flows with observable market data for inputs, such as yield or broker quotes and other third-party vendor quotes (Level 2). Fair value may also be determined using models where significant market inputs are not observable due to inactive markets or minimal market activity (Level 3). We maximize the use of observable market inputs to the extent possible. Our Level 2 trading and FVOCI securities are primarily valued using discounted cash flow models with observable spreads or broker quotes and other third-party vendor quotes. Level 2 structured note liabilities are valued using models with observable market information. Level 2 derivative assets and liabilities are valued using industry standard models and observable market information. The extent of our use of actively quoted market prices (Level 1), internal models using observable market information as inputs (Level 2) and models without observable market information as inputs (Level 3) in the valuation of securities, business and government loans classified as FVTPL and FVOCI, other assets, fair value liabilities, derivative assets and derivative liabilities is presented in the following tables: (Canadian $ in millions) July 31, 2021 October 31, 2020 Valued using quoted market prices Valued using models (with observable inputs) Valued using models (without observable inputs) Total Valued using quoted market prices Valued using models (with observable inputs) Valued using models (without observable inputs) Total Trading Securities Issued or guaranteed by: Canadian federal government 5,031 1,264 - 6,295 6,529 4,371 - 10,900 Canadian provincial and municipal governments 3,368 2,863 - 6,231 1,868 6,467 - 8,335 U.S. federal government 5,581 2,581 - 8,162 5,702 2,716 - 8,418 U.S. states, municipalities and agencies 30 264 - 294 16 487 - 503 Other governments 1,152 404 - 1,556 1,021 1,495 - 2,516 NHA MBS, U.S. agency MBS and CMO - 13,282 794 14,076 7 11,487 803 12,297 Corporate debt 2,711 6,747 2 9,460 3,767 7,274 - 11,041 Trading loans - 194 - 194 - 67 - 67 Corporate equity 55,901 - - 55,901 43,757 - - 43,757 73,774 27,599 796 102,169 62,667 34,364 803 97,834 FVTPL Securities Issued or guaranteed by: Canadian federal government 781 221 - 1,002 452 149 - 601 Canadian provincial and municipal governments 469 885 - 1,354 180 1,249 - 1,429 U.S. federal government 1 48 - 49 - 44 - 44 Other governments - 93 - 93 - 94 - 94 NHA MBS, U.S. agency MBS and CMO - 11 - 11 - 3 - 3 Corporate debt 141 7,611 - 7,752 70 7,827 - 7,897 Corporate equity 1,690 12 2,276 3,978 1,587 10 1,903 3,500 3,082 8,881 2,276 14,239 2,289 9,376 1,903 13,568 FVOCI Securities Issued or guaranteed by: Canadian federal government 13,627 983 - 14,610 20,765 1,685 - 22,450 Canadian provincial and municipal governments 1,655 1,019 - 2,674 2,604 2,143 - 4,747 U.S. federal government 17,166 3,529 - 20,695 14,852 2,842 - 17,694 U.S. states, municipalities and agencies 93 4,318 1 4,412 8 5,267 1 5,276 Other governments 3,126 3,471 - 6,597 3,643 3,738 - 7,381 NHA MBS, U.S. agency MBS and CMO - 12,853 - 12,853 - 12,532 - 12,532 Corporate debt 654 1,945 - 2,599 792 2,442 - 3,234 Corporate equity - - 113 113 - - 93 93 36,321 28,118 114 64,553 42,664 30,649 94 73,407 Business and government loans - 4,573 2,305 6,878 - 3,412 1,945 5,357 Other Assets (1) 3,274 85 - 3,359 5,328 117 - 5,445 Fair Value Liabilities Securities sold but not yet purchased 21,383 7,114 - 28,497 19,740 9,636 - 29,376 Structured note liabilities (2) - 22,085 - 22,085 - 18,073 - 18,073 Other liabilities (3) - 2,087 13 2,100 - 1,285 - 1,285 21,383 31,286 13 52,682 19,740 28,994 - 48,734 Derivative Assets Interest rate contracts 12 10,213 - 10,225 13 14,916 - 14,929 Foreign exchange contracts 3 15,667 - 15,670 1 10,825 - 10,826 Commodity contracts 352 5,582 - 5,934 123 2,465 - 2,588 Equity contracts 965 3,534 - 4,499 750 7,711 - 8,461 Credit default swaps - 3 - 3 - 11 - 11 1,332 34,999 - 36,331 887 35,928 - 36,815 Derivative Liabilities Interest rate contracts 6 7,761 - 7,767 22 10,871 - 10,893 Foreign exchange contracts 11 11,998 - 12,009 3 10,609 - 10,612 Commodity contracts 638 1,042 - 1,680 350 1,983 - 2,333 Equity contracts 565 7,140 - 7,705 456 6,067 - 6,523 Credit default swaps - 2 4 6 - 10 4 14 1,220 27,943 4 29,167 831 29,540 4 30,375 (1) Other assets include precious metals and certain receivables measured at fair value included in other assets, other, in our Consolidated Balance Sheet. (2) These structured note liabilities included in deposits have been designated at FVTPL. (3) Other liabilities include investment contract liabilities in our insurance business, certain payables and metals deposits that have been designated at FVTPL, as well as certain securitization and structured entities’ liabilities measured at FVTPL. Certain comparative figures have been reclassified to conform with the current period’s presentation. Quantitative Information about Level 3 Fair Value Measurements The table below presents the fair values of our significant Level 3 financial instruments that are measured at fair value on a recurring basis, the valuation techniques used to determine their fair values and the value ranges of significant unobservable inputs used in the valuations. We have not applied any other reasonably possible alternative assumptions to the significant Level 3 categories of private equity investments, as the net asset values are provided by the investment or fund managers. Range of input values (1) As at July 31, 2021 (Canadian $ in millions, except as noted) Reporting line in fair value hierarchy table Fair value Valuation techniques Significant unobservable inputs Low High Private equity (2) Corporate equity 2,276 Net Asset Value Net Asset Value na na EV/EBITDA Multiple 6 16 Loans (3) Business and government loans 2,305 Discounted cash flows Discount margin 50bps 144bps NHA MBS and U.S. agency MBS and CMO NHA MBS and U.S. agency MBS and CMO 794 Discounted cash flows Prepayment rate 4% 38% Market Comparable Comparability Adjustment (4) (4.64) 4.53 (1) The low and high input values represent the highest and lowest actual level of inputs used to value a group of financial instruments in a particular product category. These input ranges do not reflect the level of input uncertainty, but are affected by the specific underlying instruments within each product category. The input ranges will therefore vary from period to period based on the characteristics of the underlying instruments held at each balance sheet date. (2) Included in private equity is $457 million of Federal Reserve Bank and U.S. Federal Home Loan Bank shares that we carry at cost as at July 31, 2021 ($487 million as at October 31, 2020), which approximates fair value, and are held to meet regulatory requirements. (3) The impact of assuming a 10 basis point increase or decrease in discount margin for business and government loans is $4 million as at July 31, 2021 ($3 million as at October 31, 2020). (4) Range of input values represents price per security adjustment. na - not applicable Significant Transfers Our policy is to record transfers of assets and liabilities between fair value hierarchy levels at their fair values as at the end of each reporting period, consistent with the date of the determination of fair value. Transfers between the various fair value hierarchy levels reflect changes in the availability of quoted market prices or observable market inputs that result from changes in market conditions. Transfers from Level 1 to Level 2 were due to reduced observability of the inputs used to value the securities. Transfers from Level 2 to Level 1 were due to increased availability of quoted prices in active markets. The following table presents significant transfers between Level 1 and Level 2 for the three and nine months ended July 31, 2021 and July 31, 2020. (Canadian $ in millions) For the three months ended July 31, 2021 July 31, 2020 Level 1 to Level 2 Level 2 to Level 1 Level 1 to Level 2 Level 2 to Level 1 Trading Securities 639 1,473 994 2,682 FVTPL Securities 153 403 19 241 FVOCI Securities 1,016 1,917 1,768 4,294 Securities sold but not yet purchased 197 648 681 2,067 (Canadian $ in millions) For the nine months ended July 31, 2021 July 31, 2020 Level 1 to Level 2 Level 2 to Level 1 Level 1 to Level 2 Level 2 to Level 1 Trading Securities 4,067 11,009 5,761 3,952 FVTPL Securities 361 804 518 302 FVOCI Securities 6,856 10,890 9,032 7,012 Securities sold but not yet purchased 1,198 5,905 4,432 2,982 Changes in Level 3 Fair Value Measurements The tables below present a reconciliation of all changes in Level 3 financial instruments for the three and nine months ended July 31, 2021 and July 31, 2020, including realized and unrealized gains (losses) included in earnings and other comprehensive income as well as transfers into and out of Level 3. Transfers from Level 2 into Level 3 were due to an increase in unobservable market inputs used in pricing the securities. Transfers out of Level 3 into Level 2 were due to an increase in observable market inputs used in pricing the securities. Change in fair value For the three months ended July 31, 2021 (Canadian $ in millions) Balance April 30, 2021 Included in Included in other comprehensive income (1) Issuances/ Purchases Sales (2) Maturities/ Settlement Transfers into Level 3 Transfers out of Level 3 Fair Value as at July 31, 2021 Change in unrealized gains (losses) recorded in income for instruments still held (3) Trading Securities NHA MBS and U.S. agency MBS and CMO 702 (78 ) 11 441 (255 ) - 35 (62 ) 794 5 Corporate debt 3 - - - (1 ) - - - 2 - Total trading securities 705 (78 ) 11 441 (256 ) - 35 (62 ) 796 5 FVTPL Securities Corporate equity 2,048 158 20 175 (106 ) - - (19 ) 2,276 149 Total FVTPL securities 2,048 158 20 175 (106 ) - - (19 ) 2,276 149 FVOCI Securities Issued or guaranteed by: U.S. states, municipalities and agencies 1 - - - - - - - 1 na Corporate equity 100 - 9 4 - - - - 113 na Total FVOCI securities 101 - 9 4 - - - - 114 na Business and government loans 2,841 - 45 113 - (694 ) - - 2,305 - Other Liabilities - - - - - - 13 - 13 - Derivative Liabilities Credit default swaps 4 - - - - - - - 4 - Total derivative liabilities 4 - - - - - - - 4 - Change in fair value For the nine months ended July 31, 2021 (Canadian $ in millions) Balance October 31, 2020 Included in earnings Included in other comprehensive income (1) Issuances/ Purchases Sales (2) Maturities/ Transfers into Level 3 Transfers out of Level 3 Fair Value as at July 31, 2021 Change in unrealized gains (losses) recorded in income for instruments still held (3) Trading Securities NHA MBS and U.S. agency MBS and CMO 803 (172 ) (50 ) 1,206 (938 ) - 106 (161 ) 794 24 Corporate debt - - - 3 (1 ) - - - 2 - Total trading securities 803 (172 ) (50 ) 1,209 (939 ) - 106 (161 ) 796 24 FVTPL Securities Corporate equity 1,903 217 (81 ) 453 (193 ) (4 ) - (19 ) 2,276 262 Total FVTPL 1,903 217 (81 ) 453 (193 ) (4 ) - (19 ) 2,276 262 FVOCI Securities Issued or guaranteed by: U.S. states, municipalities and agencies 1 - - - - - - - 1 na Corporate equity 93 - 9 11 - - - - 113 na Total FVOCI securities 94 - 9 11 - - - - 114 na Business and government loans 1,945 - (150 ) 1,812 - (1,302 ) - - 2,305 - Other Liabilities - - - - - - 13 - 13 - Derivative Liabilities Credit default swaps 4 - - - - - - - 4 - Total derivative liabilities 4 - - - - - - - 4 - (1) Foreign exchange translation on trading securities held by foreign subsidiaries is included in other comprehensive income, net foreign operations. (2) Includes proceeds received on securities sold but not yet purchased. (3) Changes in unrealized gains (losses) on Trading and FVTPL securities still held on July 31, 2021 are included in earnings for the period. Unrealized gains (losses) recognized on Level 3 financial instruments may be offset by (losses) gains on economic hedge contracts. na – not applicable Change in fair value For the three months ended July 31, 2020 (Canadian $ in millions) Balance Included in earnings Included in other comprehensive Issuances/ Purchases Sales (2) Maturities/ Settlement Transfers into Level 3 Transfers out of Level 3 Fair Value as at July 31, 2020 Change in unrealized gains (losses) recorded for instruments still held (3) Trading Securities NHA MBS and U.S. agency MBS and CMO 487 (115 ) (18 ) 362 (151 ) - 41 (22 ) 584 (74 ) Corporate debt 48 10 (2 ) - (56 ) - - - - - Total trading securities 535 (105 ) (20 ) 362 (207 ) - 41 (22 ) 584 (74 ) FVTPL Securities Corporate equity 2,062 (23 ) (57 ) 58 (233 ) - - - 1,807 2 Total FVTPL 2,062 (23 ) (57 ) 58 (233 ) - - - 1,807 2 FVOCI Securities Issued or guaranteed by: U.S. states, municipalities and agencies 1 - - - - - - - 1 na Corporate equity 83 - - 4 - - - - 87 na Total FVOCI securities 84 - - 4 - - - - 88 na Business and government loans 2,028 - 95 765 - (685 ) - - 2,203 - Other Liabilities - - - - - - - - - - Derivative Liabilities Credit default swaps 4 - - - - - - (1 ) 3 - Total derivative liabilities 4 - - - - - - (1 ) 3 - Change in fair value For the nine months ended July 31, 2020 (Canadian $ in millions) Balance October 31, 2019 Included in earnings Included in other comprehensive income (1) Issuances/ Purchases Sales (2) Maturities/ Settlement Transfers into Level 3 Transfers out of Level 3 Fair Value as at July 31, 2020 Change in unrealized gains (losses) recorded in income for instruments still held (3) Trading Securities NHA MBS and U.S. agency MBS and CMO 538 (245 ) 12 811 (540 ) - 202 (194 ) 584 (158 ) Corporate debt 7 10 (2 ) 50 (68 ) - 3 - - (1 ) Total trading securities 545 (235 ) 10 861 (608 ) - 205 (194 ) 584 (159 ) FVTPL Securities Corporate equity 1,984 (27 ) 23 244 (418 ) - 1 - 1,807 7 Total FVTPL 1,984 (27 ) 23 244 (418 ) - 1 - 1,807 7 FVOCI Securities Issued or guaranteed by: U.S. states, municipalities and agencies 1 - - - - - - - 1 na Corporate equity 81 - - 6 - - - - 87 na Total FVOCI securities 82 - - 6 - - - - 88 na Business and government loans 1,736 (3 ) 183 1,705 - (1,418 ) - - 2,203 - Other Liabilities - - - - - - - - - - Derivative Liabilities Credit default swaps 1 - - - - - 3 (1 ) 3 - Total derivative liabilities 1 - - - - - 3 (1 ) 3 - (1) Foreign exchange translation on trading securities held by foreign subsidiaries is included in other comprehensive income, net foreign operations. (2) Includes proceeds received on securities sold but not yet purchased. (3) Changes in unrealized gains (losses) on Trading and FVTPL securities still held on July 31, 2020 are included in earnings for the period. Unrealized gains (losses) recognized on Level 3 financial instruments may be offset by (losses) gains on economic hedge contracts. na – not applicable

Capital Management

Capital Management	9 Months Ended
	Jul. 31, 2021
Text Block [Abstract]
Capital Management	Note 7: Capital Management Our objective is to maintain a strong capital position in a cost-effective structure that: is appropriate given our target regulatory capital ratios and internal assessment of required economic capital; underpins our operating groups’ business strategies; supports depositor, investor and regulator confidence, while building long-term shareholder value; and is consistent with our target credit ratings. As at July 31, 2021, we met OSFI’s target capital ratio requirements, which include a 2.5% Capital Conservation Buffer, a 1.0% Common Equity Surcharge for Domestic Systemically Important Banks (D-SIBs), D-SIBs. Regulatory Capital Measures, Risk-Weighted Assets and Leverage Exposures (Canadian $ in millions, except as noted) July 31, 2021 October 31, 2020 Common Equity Tier 1 (CET1) Capital 43,349 40,077 Tier 1 Capital 48,826 45,840 Total Capital 56,203 54,661 Risk-Weighted Assets 322,529 336,607 Leverage Exposures 969,824 953,640 CET 1 Capital Ratio 13.4% 11.9% Tier 1 Capital Ratio 15.1% 13.6% Total Capital Ratio 17.4% 16.2% Leverage Ratio 5.0% 4.8%

Employee Compensation

Employee Compensation	9 Months Ended
	Jul. 31, 2021
Text Block [Abstract]
Employee Compensation	Note 8: Employee Compensation Stock Options We did not grant any stock options during the three months ended July 31, 2021 and 2020. During the nine months ended July 31, 2021, we granted a total of 984,943 stock options (976,087 stock options during the nine months ended July 31, 2020). The weighted-average fair value of options granted during the nine months ended July 31, 2021 was $10.75 per option ($9.46 per option for the nine months ended July 31, 2020). To determine the fair value of the stock option tranches (i.e. the portion that vests each year) on the grant date, the following ranges of values were used for each option pricing assumption: For stock options granted during the nine months ended July 31, 2021 July 31, 2020 Expected dividend yield 4.9% 4.3% Expected share price volatility 20.6% - 20.7% 15.4% Risk-free rate of return 1.0% 1.9% - 2.0% Expected period until exercise (in years) 6.5 - 7.0 6.5 - 7.0 Exercise price ($) 97.14 101.47 Changes to the input assumptions can result in different fair value estimates. Pension and Other Employee Future Benefit Expenses Pension and other employee future benefit expenses are determined as follows: (Canadian $ in millions) Pension benefit plans Other employee future benefit plans For the three months ended July 31, 2021 July 31, 2020 July 31, 2021 July 31, 2020 Current service cost 67 62 2 2 Net interest expense on net defined benefit (asset) liability 2 1 8 8 Administrative expenses 1 1 - - Benefits expense 70 64 10 10 Canada and Quebec pension plan expense 24 22 - - Defined contribution expense 33 37 - - Total pension and other employee future benefit expenses 127 123 10 10 (Canadian $ in millions) Pension benefit plans Other employee future benefit plans For the nine months ended July 31, 2021 July 31, 2020 July 31, 2021 July 31, 2020 Current service cost 201 187 6 8 Net interest expense on net defined benefit (asset) liability 6 1 23 24 Administrative expenses 3 3 - - Benefits expense 210 191 29 32 Canada and Quebec pension plan expense 76 75 - - Defined contribution expense 126 135 - - Total pension and other employee future benefit expenses 412 401 29 32

Earnings Per Share

Earnings Per Share	9 Months Ended
	Jul. 31, 2021
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Earnings Per Share	Note 9: Earnings Per Share Basic earnings per share is calculated by dividing net income, after deducting dividends payable on preferred shares and distributions payable on other equity instruments, by the daily average number of fully paid common shares outstanding throughout the period. Diluted earnings per share is calculated in the same manner, with further adjustments made to reflect the dilutive impact of instruments convertible into our common shares. The following tables present our basic and diluted earnings per share: Basic Earnings Per Common Share (Canadian $ in millions, except as noted) For the three months ended For the nine months ended July 31, 2021 July 31, 2020 July 31, 2021 July 31, 2020 Net income 2,275 1,232 5,595 3,513 Dividends on preferred shares and distributions payable on other equity instruments (61 ) (73 ) (185 ) (195) Net income available to common shareholders 2,214 1,159 5,410 3,318 Weighted-average number of common shares outstanding (in thousands) 647,178 641,300 646,808 640,129 Basic earnings per common share (Canadian $) 3.42 1.81 8.36 5.18 Diluted Earnings Per Common Share Net income available to common shareholders adjusted for impact of dilutive instruments 2,214 1,159 5,410 3,318 Weighted-average number of common shares outstanding (in thousands) 647,178 641,300 646,808 640,129 Effect of dilutive instruments Stock options potentially exercisable (1) 6,213 2,400 6,585 3,473 Common shares potentially repurchased (4,394 ) (2,046 ) (5,229 ) (2,721) Weighted-average number of diluted common shares outstanding (in thousands) 648,997 641,654 648,164 640,881 Diluted earnings per common share (Canadian $) 3.41 1.81 8.35 5.18 (1) In computing diluted earnings per share, we did not exclude any stock options outstanding for the three and

Income Taxes

Income Taxes	9 Months Ended
	Jul. 31, 2021
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Income Taxes	Note 10: Income Taxes Canadian Taxing Authorities have reassessed us for additional income tax and interest in an amount of approximately $1,210 million, to date, in respect of certain 2011-2016 Canadian corporate dividends. Those reassessments denied certain dividend deductions on the basis that the dividends were received as part of a “dividend rental arrangement”. The tax rules raised by the Canadian Taxing Authorities were prospectively addressed in the 2015 and 2018 Canadian Federal Budgets. In the future, we expect to be reassessed for significant income tax for similar activities. We remain of the view that our tax filing positions were appropriate and intend to challenge all reassessments. However, if such challenges are unsuccessful, the additional expense would negatively impact our net income.

Operating Segmentation

Operating Segmentation	9 Months Ended
	Jul. 31, 2021
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Operating Segmentation	Note 11: Operating Segmentation Operating Groups We conduct our business through three operating groups, each of which has a distinct mandate. Our operating groups are Personal and Commercial Banking (P&C) (comprised of Canadian Personal and Commercial Banking (Canadian P&C) and U.S. Personal and Commercial Banking (U.S. P&C)), BMO Wealth Management (BMO WM) and BMO Capital Markets (BMO CM), along with a Corporate Services unit. For additional information refer to Note 25 of our annual consolidated financial statements for the year ended October 31, 2020. Our results and average assets, grouped by operating segment, are as follows: (Canadian $ in millions) For the three months ended July 31, 2021 Canadian P&C U.S. P&C BMO WM BMO CM Corporate Services (1) Total Net interest income (2) 1,660 1,048 247 696 (130 ) 3,521 Non-interest 581 304 2,179 888 89 4,041 Total Revenue 2,241 1,352 2,426 1,584 (41 ) 7,562 Provision for (recovery of) credit losses on impaired loans 101 (9 ) - (19 ) (2 ) 71 Recovery of credit losses on performing loans (7 ) (53 ) (2 ) (75 ) (4 ) (141 ) Total provision for (recovery of) credit losses 94 (62 ) (2 ) (94 ) (6 ) (70 ) Insurance claims, commissions and changes in policy benefit liabilities - - 984 - - 984 Depreciation and amortization 131 119 66 68 - 384 Other non-interest 915 570 847 850 118 3,300 Income (loss) before taxes 1,101 725 531 760 (153 ) 2,964 Provision for (recovery of) income taxes 286 172 130 202 (101 ) 689 Reported net income (loss) 815 553 401 558 (52 ) 2,275 Average Assets 265,639 125,840 48,053 367,900 162,811 970,243 For the three months ended July 31, 2020 Canadian P&C U.S. P&C BMO WM BMO CM Corporate Services (1) Total Net interest income (2) 1,509 1,107 229 952 (262 ) 3,535 Non-interest 453 292 2,255 576 78 3,654 Total Revenue 1,962 1,399 2,484 1,528 (184 ) 7,189 Provision for credit losses on impaired loans 257 109 1 79 - 446 Provision for credit losses on performing loans 313 223 7 58 7 608 Total provision for credit losses 570 332 8 137 7 1,054 Insurance claims, commissions and changes in policy benefit liabilities - - 1,189 - - 1,189 Depreciation and amortization 126 137 73 64 - 400 Other non-interest 835 615 764 761 69 3,044 Income (loss) before taxes 431 315 450 566 (260 ) 1,502 Provision for (recovery of) income taxes 112 52 109 140 (143 ) 270 Reported net income (loss) 319 263 341 426 (117 ) 1,232 Average Assets 252,028 140,615 46,308 379,131 159,682 977,764 (Canadian $ in millions) For the nine months ended July 31, 2021 Canadian P&C U.S. P&C BMO WM BMO CM Corporate Services (1) Total Net interest income (2) 4,849 3,194 723 2,242 (454 ) 10,554 Non-interest 1,633 935 4,795 2,454 242 10,059 Total Revenue 6,482 4,129 5,518 4,696 (212 ) 20,613 Provision for (recovery of) credit losses on impaired loans 404 17 3 20 (3 ) 441 Recovery of credit losses on performing loans (22 ) (133 ) (10 ) (126 ) (4 ) (295 ) Total provision for (recovery of) credit losses 382 (116 ) (7 ) (106 ) (7 ) 146 Insurance claims, commissions and changes in policy benefit liabilities - - 1,302 - - 1,302 Depreciation and amortization 390 365 213 201 - 1,169 Non-interest 2,582 1,689 2,547 2,432 1,287 10,537 Income (loss) before taxes 3,128 2,191 1,463 2,169 (1,492 ) 7,459 Provision for (recovery of) income taxes 812 514 358 565 (385 ) 1,864 Reported net income (loss) 2,316 1,677 1,105 1,604 (1,107 ) 5,595 Average Assets 259,813 128,722 47,761 371,046 166,462 973,804 For the nine months ended July 31, 2020 Canadian U.S. P&C BMO WM BMO CM Corporate Total Net interest income (2) 4,561 3,287 672 2,503 (582 ) 10,441 Non-interest 1,443 912 4,727 1,445 232 8,759 Total Revenue 6,004 4,199 5,399 3,948 (350 ) 19,200 Provision for credit losses on impaired loans 607 365 4 205 2 1,183 Provision for credit losses on performing loans 612 315 13 390 8 1,338 Provision for credit losses 1,219 680 17 595 10 2,521 Insurance claims, commissions and changes in policy benefit liabilities - - 1,708 - - 1,708 Depreciation and amortization 385 427 220 179 - 1,211 Non-interest 2,539 1,903 2,417 2,256 303 9,418 Income (loss) before taxes 1,861 1,189 1,037 918 (663 ) 4,342 Provision for (recovery of) income taxes 481 236 261 210 (359 ) 829 Reported net income (loss) 1,380 953 776 708 (304 ) 3,513 Average Assets 251,325 139,196 45,234 370,363 129,399 935,517 (1) Corporate Services includes Technology and Operations. (2) Operating groups report on a taxable equivalent basis (teb). Revenue and the provision for income taxes are increased on tax-exempt before-tax tax-exempt Certain comparative figures have been reclassified to conform with the current period’s presentation.

Divestitures

Divestitures	9 Months Ended
	Jul. 31, 2021
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Divestitures	Note 12: Divestitures On April 30, 2021, we completed the sale of our Private Banking business in Hong Kong and Singapore, part of our BMO WM operating segment, to J. Safra Sarasin Group. The business sold is not considered material to the bank. On April 12, 2021, we entered into an agreement with Ameriprise Financial Inc. (Ameriprise) to sell BMO’s EMEA asset management business, part of our BMO WM operating segment, for £615 million (CAD$1,066 million) in an all-cash held-for-sale, million in the second quarter of 2021. In the current quarter, we recognized an additional write-down of goodwill of million based on updated assumptions. The write-down is included in non-interest On July 27, 2021, we entered into an agreement to sell Taplin, Canida & Habacht, LLC, part of our U.S. asset management business to Loop Capital. The transaction is expected to close in the first quarter of fiscal 2022, subject to customary closing conditions. The business sold is not considered material to the bank.

Legal Proceedings

Legal Proceedings	9 Months Ended
	Jul. 31, 2021
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Legal Proceedings	Note 13: Legal Proceedings BMO and its subsidiaries are named as defendants or are otherwise involved in a substantial number of legal proceedings. BMO Harris Bank N.A. (BMO Harris), as successor to M&I Marshall and Ilsley Bank (M&I), has been named as the defendant in a lawsuit filed in the U.S. Bankruptcy Court for the District of Minnesota (Bankruptcy Court) in connection with a Ponzi scheme carried out by Thomas J. Petters and certain affiliated individuals and entities (collectively, Petters) between 1994 and 2008. The lawsuit, brought by a Trustee in bankruptcy proceedings for certain Petters entities, alleges that, between 1999 and 2008, M&I (and a predecessor bank) facilitated the Ponzi scheme operated by Petters. BMO denies these allegations and continues to defend itself vigorously. The Trustee seeks US$ billion in compensatory damages, plus prejudgment interest, punitive damages, and attorneys’ fees. The Bankruptcy Court: (i) denied BMO Harris’s motion for summary judgment; (ii) granted the Trustee’s motion for sanctions based on the alleged spoliation of evidence; and (iii) transferred the case to the U.S. District Court for the District of Minnesota (District Court) for trial. BMO Harris filed an objection to the spoliation sanctions, which is still pending before the District Court. BMO Harris anticipates that the trial in this case may take place in the first half of 2022. While it is inherently difficult to predict the ultimate outcome of this or other proceedings, BMO does not expect the outcome of any of these proceedings, individually or in the aggregate, to have a material adverse effect on the consolidated financial position or the results of operation of the bank .

Basis of Presentation (Tables)

Basis of Presentation (Tables)	9 Months Ended
	Jul. 31, 2021
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Summary of quantitative information for financial instruments	The table below presents quantitative information for financial instruments that referenced certain IBORs as at November 1, 2020, the date of adoption for Phase 2 relief, and were either due to mature after December 31, 2021 or demand facilities that will be subject to remediation to amend the benchmark interest rate. Our GBP LIBOR and other LIBOR exposures have not materially changed since November 1, 2020. (Canadian $ in millions) November 1, 2020 USD LIBOR GBP LIBOR Other (1) Non-derivative 100,521 868 1,225 Non-derivative 7,435 692 - Derivative notional amounts (3)(4) 1,570,534 20,972 6,702 Authorized and committed loan commitments (5)(6) 68,449 194 23,633 (1) Includes CHF LIBOR, EONIA and JPY LIBOR. (2) All amounts are presented based on contractual amounts outstanding with the exception of securities, in non-derivative (3) Notionals represent the amount to which a rate or price is applied in order to calculate the amount of cash that must be exchanged under the contract. Notional amounts do not represent assets or liabilities and therefore are not recorded in our Consolidated Balance Sheet. (4) Includes certain cross-currency swap positions where both the pay and receive leg currently reference an IBOR. For those derivatives, the table above includes the notional for both the pay and receive legs in the relevant columns aligning with the IBOR exposure. (5) Excludes personal lines of credit and credit cards that are unconditionally cancellable at our discretion. A large majority of these commitments expire without being drawn upon. As a result, the total contractual amounts may not be representative of the funding likely to be required for these commitments. (6) Other includes loan commitments where our customers have the option to draw from their facility in multiple currencies. Amounts drawn will be subject to prevailing interbank offered rates for the foreign currency, including those that are in scope of IBOR reform. As a result of extending the cessation date of certain USD LIBOR settings, more contracts will expire prior to cessation and therefore the number and value of contracts that will be subject to remediation efforts has reduced. The following table presents the value of financial instruments impacted by the FCA extension as at April 30, 2023 as presented in our second quarter financial statements, that is, ones that reference USD LIBOR (with the exception of the 1 week and 2-month (Canadian $ in millions) April 30, 2021 USD LIBOR Non-derivative 75,455 Non-derivative 2,933 Derivative notional amounts (2) 1,112,747 Authorized and committed loan commitments (3)(4) 45,794 (1) All amounts are presented based on contractual amounts outstanding with the exception of securities, in non-derivative (2) Notionals represent the amount to which a rate or price is applied in order to calculate the amount of cash that must be exchanged under the contract. Notional amounts do not represent assets or liabilities and therefore are not recorded in our Consolidated Balance Sheet. (3) Excludes personal lines of credit and credit cards that are unconditionally cancellable at our discretion. A large majority of these commitments expire without being drawn upon. As a result, the total contractual amounts may not be representative of the funding likely to be required for these commitments. (4) Excludes $8,746 million of loan commitments where the customer’s option to draw in another currency impacted by IBOR reform is limited to USD. Any amounts drawn under the option will be subject to USD LIBOR, which will be impacted by the June 30, 2023 cessation date.

Securities (Tables)

Securities (Tables)	9 Months Ended
	Jul. 31, 2021
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Unrealized Gains and Losses On Securities at Fair Value Through Other Comprehensive Income	The following table summarizes the unrealized gains and losses: (Canadian $ in millions) July 31, 2021 October 31, 2020 Cost/ Amortized cost Gross unrealized gains Gross unrealized losses Fair value Cost/ Amortized cost Gross unrealized gains Gross unrealized losses Fair value Issued or guaranteed by: Canadian federal government 14,503 124 17 14,610 22,240 211 1 22,450 Canadian provincial and municipal governments 2,630 45 1 2,674 4,628 119 - 4,747 U.S. federal government 20,183 590 77 20,696 16,881 844 31 17,694 U.S. states, municipalities and agencies 4,296 117 1 4,412 5,132 147 3 5,276 Other governments 6,520 88 11 6,597 7,222 168 9 7,381 National Housing Act (NHA) mortgage-backed securities (MBS) 1,287 13 1 1,299 1,583 46 - 1,629 U.S. agency MBS and collateralized mortgage obligations (CMO) 11,323 242 11 11,554 10,600 307 4 10,903 Corporate debt 2,561 43 6 2,598 3,153 91 10 3,234 Corporate equity 101 12 - 113 90 3 - 93 Total 63,404 1,274 125 64,553 71,529 1,936 58 73,407 Unrealized gains (losses) may be offset by related (losses) gains on hedge contracts.
Summary of Interest, Dividend and Fee Income	The following table presents interest income calculated using the effective interest method: (Canadian $ in millions) For the three months ended For the nine months ended July 31, 2021 July 31, 2020 July 31, 2021 July 31, 2020 FVOCI - Debt 114 185 366 823 Amortized cost 101 144 309 455 Total 215 329 675 1,278

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses (Tables)	9 Months Ended
	Jul. 31, 2021
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Summary of Credit Risk Exposures for Loans Carried at Amortized Cost, FVOCI or FVTPL	The following table sets out our credit risk exposure for all loans carried at amortized cost, FVOCI or FVTPL as at July 31, 2021 and October 31, 2020. Stage 1 represents those performing loans carried with up to a 12 month expected credit loss, Stage 2 represents those performing loans carried with a lifetime expected credit loss, and Stage 3 represents those loans with a lifetime credit loss that are credit impaired. (Canadian $ in millions) July 31, 2021 October 31, 2020 Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total Loans: Residential mortgages Exceptionally low 2 - - 2 1 - - 1 Very low 91,813 417 - 92,230 79,295 429 - 79,724 Low 22,578 2,605 - 25,183 24,490 2,481 - 26,971 Medium 11,544 3,475 - 15,019 11,560 6,461 - 18,021 High 112 303 - 415 172 446 - 618 Not rated 1,088 53 - 1,141 1,132 148 - 1,280 Impaired - - 384 384 - - 409 409 Allowance for credit losses 51 37 13 101 51 75 16 142 Carrying amount 127,086 6,816 371 134,273 116,599 9,890 393 126,882 Loans: Consumer instalment and other personal Exceptionally low 1,468 28 - 1,496 1,550 31 - 1,581 Very low 29,735 28 - 29,763 26,645 37 - 26,682 Low 23,142 505 - 23,647 20,935 585 - 21,520 Medium 10,953 3,769 - 14,722 10,324 4,334 - 14,658 High 465 1,288 - 1,753 429 1,470 - 1,899 Not rated 3,363 49 - 3,412 3,372 96 - 3,468 Impaired - - 299 299 - - 340 340 Allowance for credit losses 127 362 98 587 134 429 105 668 Carrying amount 68,999 5,305 201 74,505 63,121 6,124 235 69,480 Loans: Credit cards (1) Exceptionally low 2,468 - - 2,468 2,252 - - 2,252 Very low 412 1 - 413 1,106 15 - 1,121 Low 1,636 136 - 1,772 899 148 - 1,047 Medium 1,649 725 - 2,374 1,611 899 - 2,510 High 60 297 - 357 58 377 - 435 Not rated 482 - - 482 524 - - 524 Impaired - - - - - - - - Allowance for credit losses 60 233 - 293 61 272 - 333 Carrying amount 6,647 926 - 7,573 6,389 1,167 - 7,556 Loans: Business and government (2) Acceptable Investment grade 146,024 1,515 - 147,539 129,100 3,242 - 132,342 Sub-investment 82,986 16,173 - 99,159 85,197 30,106 - 115,303 Watchlist - 6,926 - 6,926 - 8,621 - 8,621 Impaired - - 1,747 1,747 - - 2,889 2,889 Allowance for credit losses 584 832 427 1,843 510 1,044 606 2,160 Carrying amount 228,426 23,782 1,320 253,528 213,787 40,925 2,283 256,995 Commitments and financial guarantee contracts Acceptable Investment grade 148,061 1,024 - 149,085 138,141 1,628 - 139,769 Sub-investment 44,769 10,139 - 54,908 41,650 20,421 - 62,071 Watchlist - 2,979 - 2,979 - 4,861 - 4,861 Impaired - - 792 792 - - 1,261 1,261 Allowance for credit losses 209 191 24 424 211 288 12 511 Carrying amount (3)(4) 192,621 13,951 768 207,340 179,580 26,622 1,249 207,451 (1) Credit card loans are immediately written off when principal or interest payments are 180 days past due, and as a result are not reported as impaired in Stage 3. (2) Includes customers’ liability under acceptances. (3) Represents the total contractual amounts of undrawn credit facilities and other off-balance (4) Certain commercial borrower commitments are conditional and may include recourse with other parties.
Summary of Continuity in Loss Allowance by Each Product Type	The following tables show the continuity in the loss allowance by product type for the three and nine months ended July 31, 2021 and July 31, 2020. Transfers represent the amount of expected credit loss (ECL) that moved between stages during the period, for example, moving from a 12-month (Canadian $ in millions) For the three months ended July 31, 2021 July 31, 2020 Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total Loans: Residential mortgages Balance as at beginning of period 60 53 22 135 29 37 27 93 Transfer to Stage 1 14 (13 ) (1 ) - 8 (7 ) (1 ) - Transfer to Stage 2 (1 ) 3 (2 ) - (1 ) 4 (3 ) - Transfer to Stage 3 - (2 ) 2 - - (1 ) 1 - Net remeasurement of loss allowance (35 ) - 3 (32 ) 27 30 10 67 Loan originations 15 - - 15 4 - - 4 Derecognitions and maturities (2 ) (3 ) - (5 ) - (2 ) - (2 ) Model changes - - - - (1 ) (3 ) - (4 ) Total Provision for Credit Losses (PCL) (1) (9 ) (15 ) 2 (22 ) 37 21 7 65 Write-offs (2) - - (3 ) (3 ) - - (3 ) (3 ) Recoveries of previous write-offs - - 4 4 - - 2 2 Foreign exchange and other - - (3 ) (3 ) (1 ) - (6 ) (7 ) Balance as at end of period 51 38 22 111 65 58 27 150 Loans: Consumer instalment and other personal Balance as at beginning of period 141 401 101 643 116 407 125 648 Transfer to Stage 1 58 (56 ) (2 ) - 59 (57 ) (2 ) - Transfer to Stage 2 (5 ) 16 (11 ) - (10 ) 21 (11 ) - Transfer to Stage 3 (3 ) (24 ) 27 - (1 ) (27 ) 28 - Net remeasurement of loss allowance (64 ) 60 18 14 (50 ) 103 56 109 Loan originations 23 - - 23 9 - - 9 Derecognitions and maturities (8 ) (13 ) - (21 ) (4 ) (9 ) - (13 ) Model changes - - - - 11 8 - 19 Total PCL (1) 1 (17 ) 32 16 14 39 71 124 Write-offs (2) - - (55 ) (55 ) - - (81 ) (81 ) Recoveries of previous write-offs - - 24 24 - - 22 22 Foreign exchange and other - 2 (4 ) (2 ) (3 ) (3 ) (10 ) (16 ) Balance as at end of period 142 386 98 626 127 443 127 697 Loans: Credit cards Balance as at beginning of period 106 284 - 390 115 319 - 434 Transfer to Stage 1 42 (42 ) - - 50 (50 ) - - Transfer to Stage 2 (6 ) 6 - - (9 ) 9 - - Transfer to Stage 3 - (47 ) 47 - - (48 ) 48 - Net remeasurement of loss allowance (39 ) 84 2 47 (44 ) 105 20 81 Loan originations 11 - - 11 5 - - 5 Derecognitions and maturities (3 ) (7 ) - (10 ) (1 ) (7 ) - (8 ) Model changes - - - - (1 ) (10 ) - (11 ) Total PCL (1) 5 (6 ) 49 48 - (1 ) 68 67 Write-offs (2) - - (70 ) (70 ) - - (80 ) (80 ) Recoveries of previous write-offs - - 26 26 - - 19 19 Foreign exchange and other (1 ) (1 ) (5 ) (7 ) (3 ) (1 ) (7 ) (11 ) Balance as at end of period 110 277 - 387 112 317 - 429 Loans: Business and government Balance as at beginning of period 689 1,075 541 2,305 580 795 586 1,961 Transfer to Stage 1 114 (113 ) (1 ) - 45 (45 ) - - Transfer to Stage 2 (23 ) 63 (40 ) - (65 ) 66 (1 ) - Transfer to Stage 3 - (17 ) 17 - (4 ) (163 ) 167 - Net remeasurement of loss allowance (112 ) 13 12 (87 ) 145 510 134 789 Loan originations 87 - - 87 53 - - 53 Derecognitions and maturities (36 ) (72 ) - (108 ) (21 ) (36 ) - (57 ) Model changes - - - - (7 ) (4 ) - (11 ) Total PCL (1) 30 (126 ) (12 ) (108 ) 146 328 300 774 Write-offs (2) - - (101 ) (101 ) - - (300 ) (300 ) Recoveries of previous write-offs - - 13 13 - - 37 37 Foreign exchange and other 9 5 1 15 (5 ) 10 (46 ) (41 ) Balance as at end of period 728 954 442 2,124 721 1,133 577 2,431 Total as at end of period 1,031 1,655 562 3,248 1,025 1,951 731 3,707 Comprised of: Loans 822 1,464 538 2,824 813 1,719 719 3,251 Other credit instruments (3) 209 191 24 424 212 232 12 456 (1) Excludes PCL on other assets of $(4) million for the three months ended July 31, 2021 ($24 million for the three months ended July 31, 2020). (2) Generally, we continue to seek recovery on amounts that were written off during the year, unless the loan is sold, we no longer have the right to collect or we have exhausted all reasonable efforts to collect. (3) Other credit instruments, including off-balance (Canadian $ in millions) For the nine months ended July 31, 2021 July 31, 2020 Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total Loans: Residential mortgages Balance as at beginning of period 51 75 26 152 15 33 38 86 Transfer to Stage 1 48 (39 ) (9 ) - 19 (17 ) (2 ) - Transfer to Stage 2 (3 ) 20 (17 ) - (2 ) 7 (5 ) - Transfer to Stage 3 - (11 ) 11 - - (4 ) 4 - Net remeasurement of loss allowance (68 ) 5 29 (34 ) 29 47 17 93 Loan originations 28 - - 28 8 - - 8 Derecognitions and maturities (5 ) (10 ) - (15 ) (1 ) (4 ) - (5 ) Model changes - - - - (3 ) (5 ) - (8 ) Total PCL (1) - (35 ) 14 (21 ) 50 24 14 88 Write-offs (2) - - (9 ) (9 ) - - (9 ) (9 ) Recoveries of previous write-offs - - 8 8 - - 6 6 Foreign exchange and other - (2 ) (17 ) (19 ) - 1 (22 ) (21 ) Balance as at end of period 51 38 22 111 65 58 27 150 Loans: Consumer instalment and other personal Balance as at beginning of period 148 454 105 707 89 333 136 558 Transfer to Stage 1 175 (168 ) (7 ) - 138 (131 ) (7 ) - Transfer to Stage 2 (21 ) 50 (29 ) - (20 ) 66 (46 ) - Transfer to Stage 3 (6 ) (76 ) 82 - (3 ) (79 ) 82 - Net remeasurement of loss allowance (197 ) 169 77 49 (112 ) 247 162 297 Loan originations 66 - - 66 32 - - 32 Derecognitions and maturities (21 ) (37 ) - (58 ) (12 ) (27 ) - (39 ) Model changes - - - - 16 33 - 49 Total PCL (1) (4 ) (62 ) 123 57 39 109 191 339 Write-offs (2) - - (184 ) (184 ) - - (248 ) (248 ) Recoveries of previous write-offs - - 70 70 - - 64 64 Foreign exchange and other (2 ) (6 ) (16 ) (24 ) (1 ) 1 (16 ) (16 ) Balance as at end of period 142 386 98 626 127 443 127 697 Loans: Credit cards Balance as at beginning of period 110 321 - 431 80 225 - 305 Transfer to Stage 1 141 (141 ) - - 107 (107 ) - - Transfer to Stage 2 (21 ) 21 - - (25 ) 25 - - Transfer to Stage 3 (1 ) (134 ) 135 - (1 ) (129 ) 130 - Net remeasurement of loss allowance (139 ) 234 22 117 (57 ) 332 68 343 Loan originations 28 - - 28 13 - - 13 Derecognitions and maturities (6 ) (22 ) - (28 ) (3 ) (19 ) - (22 ) Model changes - - - - (1 ) (10 ) - (11 ) Total PCL (1) 2 (42 ) 157 117 33 92 198 323 Write-offs (2) - - (212 ) (212 ) - - (257 ) (257 ) Recoveries of previous write-offs - - 73 73 - - 66 66 Foreign exchange and other (2 ) (2 ) (18 ) (22 ) (1 ) - (7 ) (8 ) Balance as at end of period 110 277 - 387 112 317 - 429 Loans: Business and government Balance as at beginning of period 658 1,258 608 2,524 338 496 311 1,145 Transfer to Stage 1 385 (380 ) (5 ) - 109 (102 ) (7 ) - Transfer to Stage 2 (86 ) 138 (52 ) - (118 ) 121 (3 ) - Transfer to Stage 3 (2 ) (83 ) 85 - (6 ) (226 ) 232 - Net remeasurement of loss allowance (327 ) 268 119 60 321 883 558 1,762 Loan originations 232 - - 232 153 - - 153 Derecognitions and maturities (102 ) (165 ) - (267 ) (63 ) (86 ) - (149 ) Model changes (5 ) (19 ) - (24 ) (30 ) 8 - (22 ) Total PCL (1) 95 (241 ) 147 1 366 598 780 1,744 Write-offs (2) - - (285 ) (285 ) - - (516 ) (516 ) Recoveries of previous write-offs - - 40 40 - - 60 60 Foreign exchange and other (25 ) (63 ) (68 ) (156 ) 17 39 (58 ) (2 ) Balance as at end of period 728 954 442 2,124 721 1,133 577 2,431 Total as at end of period 1,031 1,655 562 3,248 1,025 1,951 731 3,707 Comprised of: Loans 822 1,464 538 2,824 813 1,719 719 3,251 Other credit instruments (3) 209 191 24 424 212 232 12 456 (1) Excludes PCL on other assets of $(8) million for the nine months ended July 31, 2021 ($27 million for the nine months ended July 31, 2020). (2) Generally, we continue to seek recovery on amounts that were written off during the year, unless the loan is sold, we no longer have the right to collect or we have exhausted all reasonable efforts to collect. (3) Other credit instruments, including off-balance
Schedule of Loans and Allowance for Credit Losses by Geographic Region	Loans and allowance for credit losses by geographic region as at July 31, 2021 and October 31, 2020 are as follows: (Canadian $ in millions) July 31, 2021 October 31, 2020 Gross Allowance for credit losses Allowance for credit losses Net a Gross Allowance for credit losses Allowance for credit losses Net a By geographic region (1): Canada 293,558 352 1,269 291,937 276,975 303 1,323 275,349 United States 156,332 186 996 155,150 161,725 410 1,225 160,090 Other countries 8,550 - 21 8,529 12,023 14 28 11,981 Total 458,440 538 2,286 455,616 450,723 727 2,576 447,420 (1) Geographic region is based upon the country of ultimate risk. (2) Excludes allowance for credit losses on impaired loans of $24 million for other credit instruments, which is included in other liabilities ($12 million as at October 31, 2020). (3) Excludes allowance for credit losses on performing loans of $400 million for other credit instruments, which is included in other liabilities ($499 million as at October 31, 2020).
Schedule of Impaired Loans, Including the Related Allowances	Impaired (Stage 3) loans, including the related allowances, as at July 31, 2021 and October 31, 2020 are as follows: (Canadian $ in millions) July 31, 2021 October 31, 2020 Gross impaired Allowance for credit losses on Net impaired Gross impaired Allowance for credit losses Net impaired Residential mortgages 384 13 371 409 16 393 Consumer instalment and other personal 299 98 201 340 105 235 Business and government (1) 1,747 427 1,320 2,889 606 2,283 Total 2,430 538 1,892 3,638 727 2,911 By geographic region (2): Canada 1,207 352 855 1,343 303 1,040 United States 1,223 186 1,037 2,211 410 1,801 Other countries - - - 84 14 70 Total 2,430 538 1,892 3,638 727 2,911 (1) Includes customers’ liability under acceptances. (2) Geographic region is based upon the country of ultimate risk. (3) Gross impaired loans and net impaired loans exclude purchased credit impaired loans. (4) Excludes allowance for credit losses on impaired loans of $24 million for other credit instruments, which is included in other liabilities ($12 million as at October 31, 2020).
Summary of Loans that are Past Due but not Classified as Impaired	The following table presents loans that are past due but not classified as impaired as at July 31, 2021 and October 31, 2020. (Canadian $ in millions) July 31, 2021 October 31, 2020 30 to 89 days 90 days or more Total 30 to 89 days 90 days or more Total Residential mortgages 341 16 357 543 43 586 Credit card, consumer instalment and other personal 317 64 381 345 65 410 Business and government 219 32 251 330 22 352 Total 877 112 989 1,218 130 1,348 Fully secured loans with amounts past due between 90 and 180 days that we have not classified as impaired totalled $42 million and $53 million as at July 31, 2021 and October 31, 2020, respectively.
Summary of Key Economic Variables Used to Estimate Allowance on Performing Loans During Forecast Period	The following table shows certain key economic variables used to estimate the allowance on performing loans during the forecast period. This table is typically provided on an annual basis; however, given the continued level of uncertainty in the forward-looking information due to the impact of COVID-19, As at July 31, 2021 As at October 31, 2020 All figures are average annual values Benign scenario Base scenario Adverse scenario Benign scenario Base scenario Adverse scenario First 12 Second 12 First 12 Second 12 First 12 Second 12 First 12 Second 12 First 12 Second 12 First 12 Second 12 Real GDP growth rates (1) Canada 9.6% 5.5% 7.3% 3.9% 0.7% (1.1)% 3.7% 6.4% 1.8% 4.2% (4.4)% (1.1)% United States 10.9% 4.6% 8.7% 3.3% 0.1% (1.1)% 1.6% 6.0% (0.4)% 4.0% (5.1)% (1.2)% Corporate BBB 10-year Canada 1.5% 1.9% 1.9% 2.2% 3.6% 4.4% 1.8% 1.9% 2.2% 2.2% 3.6% 4.5% United States 1.0% 1.2% 1.3% 1.6% 4.2% 4.5% 1.7% 1.7% 2.0% 2.0% 3.9% 4.1% Unemployment rates Canada 5.9% 4.8% 7.1% 5.8% 11.2% 13.1% 7.4% 6.1% 8.9% 7.5% 12.7% 13.9% United States 4.3% 3.2% 4.9% 3.7% 9.1% 11.6% 6.4% 4.8% 8.0% 6.0% 11.5% 12.8% Housing Price Index (1) Canada (2) 24.0% 10.9% 20.9% 6.0% (8.6)% (18.0)% 10.3% 7.7% 7.2% 2.8% (1.2)% (8.7)% United States (3) 13.8% 7.0% 11.5% 4.5% (7.4)% (15.5)% 4.6% 4.5% 2.4% 2.1% (2.4)% (6.2)% (1) Real gross domestic product and housing price index are year-over-year growth rates. (2) In Canada, we use the HPI Benchmark Composite. (3) In the United States, we use the National Case-Shiller House Price Index.

Deposits and Subordinated Debt

Deposits and Subordinated Debt (Tables)	9 Months Ended
	Jul. 31, 2021
Disclosure Of Deposits [Line Items]
Summary of Deposits	Payable on demand Payable Payable on (Canadian $ in millions) Interest bearing Non-interest after notice a fixed date (4)(5) Total July 31, October 31, July 31, October 31, July 31, October 31, July 31, October 31, July 31, October 31, Deposits by: Banks (1) 5,830 3,594 1,998 2,460 769 1,231 20,630 31,540 29,227 38,825 Business and government 50,810 44,111 50,659 44,258 144,468 124,813 188,817 187,497 434,754 400,679 Individuals 4,934 4,661 35,927 30,369 117,314 111,905 58,397 72,595 216,572 219,530 Total (2) (3) 61,574 52,366 88,584 77,087 262,551 237,949 267,844 291,632 680,553 659,034 Booked in: Canada 52,667 41,855 79,560 67,873 126,999 112,543 163,465 185,655 422,691 407,926 United States 8,594 8,818 8,959 9,170 134,231 124,129 75,851 78,175 227,635 220,292 Other countries 313 1,693 65 44 1,321 1,277 28,528 27,802 30,227 30,816 Total 61,574 52,366 88,584 77,087 262,551 237,949 267,844 291,632 680,553 659,034 (1) Includes regulated and central banks. (2) Includes structured notes and metals deposits designated at FVTPL (Note 6). (3) Included in deposits as at July 31, 2021 and October 31, 2020 are $340,368 million and $322,951 million, respectively, of deposits denominated in U.S. dollars, and $28,815 million and $32,254 million, respectively, of deposits denominated in other foreign currencies. (4) Includes $31,727 million of senior unsecured debt as at July 31, 2021 subject to the Bank Recapitalization (Bail-In) Bail-In non-viable. (5) Deposits totalling $21,108 million as at July 31, 2021 ($27,353 million as at October 31, 2020) can be early redeemed (either fully or partially) by customers without penalty. As we do not expect a significant amount to be redeemed before maturity, we have classified them as payable on a fixed date.
Summary of Deposits Payable On a Fixed Date	The following table presents deposits payable on a fixed date and greater than one hundred thousand dollars: (Canadian $ in millions) Canada United States Other Total As at July 31, 2021 140,159 71,589 28,526 240,274 As at October 31, 2020 158,475 72,186 27,799 258,460
Summary of Maturity Schedule for Deposits Greater Than One Hundred Thousand Dollars Booked In Canada	The following table presents the maturity schedule for deposits payable on a fixed date and greater than one hundred thousand dollars, which are booked in Canada: (Canadian $ in millions) Less than 3 months 3 to 6 months 6 to 12 months Over 12 months Total As at July 31, 2021 22,423 13,274 23,840 80,622 140,159 As at October 31, 2020 18,081 29,679 28,109 82,606 158,475

Equity (Tables)

Equity (Tables)	9 Months Ended
	Jul. 31, 2021
Statement [Line Items]
Summary of Classes of Preferred and Common Shares Outstanding and Other Equity Instruments	Preferred and Common Shares Outstanding and Other Equity Instruments (1) (Canadian $ in millions, except as noted) July 31, 2021 October 31, 2020 Number of Amount Number of Amount Convertible into... Preferred Shares - Classified as Equity Class B – Series 25 9,425,607 236 9,425,607 236 Class B - Series 26 (2) Class B – Series 26 2,174,393 54 2,174,393 54 Class B - Series 25 (2) Class B – Series 27 20,000,000 500 20,000,000 500 Class B - Series 28 (2)(3) Class B – Series 29 16,000,000 400 16,000,000 400 Class B - Series 30 (2)(3) Class B – Series 31 12,000,000 300 12,000,000 300 Class B - Series 32 (2)(3) Class B – Series 33 8,000,000 200 8,000,000 200 Class B - Series 34 (2)(3) Class B – Series 35 - - 6,000,000 150 Not convertible (8) Class B – Series 36 - - 600,000 600 Class B - Series 37 (8) Class B – Series 38 24,000,000 600 24,000,000 600 Class B - Series 39 (2)(3) Class B – Series 40 20,000,000 500 20,000,000 500 Class B - Series 41 (2)(3) Class B – Series 42 16,000,000 400 16,000,000 400 Class B - Series 43 (2)(3) Class B – Series 44 16,000,000 400 16,000,000 400 Class B - Series 45 (2)(3) Class B – Series 46 14,000,000 350 14,000,000 350 Class B - Series 47 (2)(3) Preferred Shares - Classified as Equity 3,940 4,690 Other Equity Instruments 4.8% Additional Tier 1 Capital Notes (AT1 Notes) 658 658 Common shares (3) 4.3% Limited Recourse Capital Notes, Series 1 (LRCNs) 1,250 1,250 Common shares (3)(4) Other Equity Instruments 1,908 1,908 Preferred Shares and Other Equity Instruments 5,848 6,598 Common Shares (5) (6) (7) 648,094,938 13,609 645,889,396 13,430 (1) For additional information refer to Notes 16 and 20 of our annual consolidated financial statements for the year ended October 31, 2020. (2) If converted, the holders have the option to convert back to the original preferred shares on subsequent redemption dates. (3) The instruments issued include a NVCC provision, which is necessary for the preferred shares, AT1 Notes and by virtue of the recourse to Preferred Shares Series 48, the LRCNs (see (4) below) to qualify as regulatory capital under Basel III. As such, they are convertible into a variable number of our common shares if OSFI announces that the bank is, or is about to become, non-viable non-viability. (4) Non-deferrable Non-payment (5) The stock options issued under the Stock Option Plan are convertible into 6,077,912 common shares as at July 31, 2021 (6,446,110 common shares as at October 31, 2020). (6) During the three and nine months ended July 31, 2021, we did not issue common shares under the Shareholder Dividend Reinvestment and Share Purchase Plan and we issued 503,580 and 1,330,160 common shares, respectively, under the Stock Option Plan. (7) Common shares are net of 222,652 treasury shares as at July 31, 2021 (652,730 treasury shares as at October 31, 2020). (8) Series 35 and Series 36 were redeemed and final dividends were paid on November 25, 2020.

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Jul. 31, 2021
Text Block [Abstract]
Fair Value of Financial Instruments Not Carried at Fair Value on the Balance Sheet	Fair Value of Financial Instruments Not Carried at Fair Value on the Balance Sheet Set out in the following table are the amounts that would be reported if all financial assets and liabilities not currently carried at fair value were reported at their fair values. Refer to Note 17 to our annual consolidated financial statements for the year ended October 31, 2020 for further discussion on the determination of fair value. (Canadian $ in millions) July 31, 2021 October 31, 2020 Carrying value Fair value Carrying value Fair value Securities (1) Amortized cost 48,727 49,105 48,466 49,009 Loans (1) Residential mortgages 134,273 134,914 126,882 128,815 Consumer instalment and other personal 74,505 74,945 69,480 70,192 Credit cards 7,573 7,573 7,556 7,556 Business and government (2) 232,459 233,753 238,239 239,929 448,810 451,185 442,157 446,492 Deposits (3) 658,175 659,636 640,961 643,156 Securitization and structured entities’ liabilities (4) 23,298 23,709 26,889 27,506 Subordinated debt 6,973 7,275 8,416 8,727 This table excludes financial instruments with a carrying value approximating fair value, such as cash and cash equivalents, interest bearing deposits with banks, securities borrowed or purchased under resale agreements, customers’ liability under acceptances, other assets, acceptances, securities lent or sold under repurchase agreements and other liabilities. (1) Carrying value is net of allowances for credit losses. (2) Excludes $6,738 million of loans classified as FVTPL and $140 million of loans classified as FVOCI as at July 31, 2021, respectively ($5,306 million and $51 million, respectively, as at October 31, 2020). (3) Excludes $22,085 million of structured note liabilities ($18,073 million as at October 31, 2020) and $293 million of metals deposits ($nil as at October 31, 2020) designated at FVTPL. (4) Excludes $629 million of securitization and structured entities’ liabilities classified at FVTPL ($nil as at October 31, 2020). Certain comparative figures have been reclassified to conform with the current period’s presentation.
Summary of Assets and Liabilities categorized by the Fair Value Hierarchy	The extent of our use of actively quoted market prices (Level 1), internal models using observable market information as inputs (Level 2) and models without observable market information as inputs (Level 3) in the valuation of securities, business and government loans classified as FVTPL and FVOCI, other assets, fair value liabilities, derivative assets and derivative liabilities is presented in the following tables: (Canadian $ in millions) July 31, 2021 October 31, 2020 Valued using quoted market prices Valued using models (with observable inputs) Valued using models (without observable inputs) Total Valued using quoted market prices Valued using models (with observable inputs) Valued using models (without observable inputs) Total Trading Securities Issued or guaranteed by: Canadian federal government 5,031 1,264 - 6,295 6,529 4,371 - 10,900 Canadian provincial and municipal governments 3,368 2,863 - 6,231 1,868 6,467 - 8,335 U.S. federal government 5,581 2,581 - 8,162 5,702 2,716 - 8,418 U.S. states, municipalities and agencies 30 264 - 294 16 487 - 503 Other governments 1,152 404 - 1,556 1,021 1,495 - 2,516 NHA MBS, U.S. agency MBS and CMO - 13,282 794 14,076 7 11,487 803 12,297 Corporate debt 2,711 6,747 2 9,460 3,767 7,274 - 11,041 Trading loans - 194 - 194 - 67 - 67 Corporate equity 55,901 - - 55,901 43,757 - - 43,757 73,774 27,599 796 102,169 62,667 34,364 803 97,834 FVTPL Securities Issued or guaranteed by: Canadian federal government 781 221 - 1,002 452 149 - 601 Canadian provincial and municipal governments 469 885 - 1,354 180 1,249 - 1,429 U.S. federal government 1 48 - 49 - 44 - 44 Other governments - 93 - 93 - 94 - 94 NHA MBS, U.S. agency MBS and CMO - 11 - 11 - 3 - 3 Corporate debt 141 7,611 - 7,752 70 7,827 - 7,897 Corporate equity 1,690 12 2,276 3,978 1,587 10 1,903 3,500 3,082 8,881 2,276 14,239 2,289 9,376 1,903 13,568 FVOCI Securities Issued or guaranteed by: Canadian federal government 13,627 983 - 14,610 20,765 1,685 - 22,450 Canadian provincial and municipal governments 1,655 1,019 - 2,674 2,604 2,143 - 4,747 U.S. federal government 17,166 3,529 - 20,695 14,852 2,842 - 17,694 U.S. states, municipalities and agencies 93 4,318 1 4,412 8 5,267 1 5,276 Other governments 3,126 3,471 - 6,597 3,643 3,738 - 7,381 NHA MBS, U.S. agency MBS and CMO - 12,853 - 12,853 - 12,532 - 12,532 Corporate debt 654 1,945 - 2,599 792 2,442 - 3,234 Corporate equity - - 113 113 - - 93 93 36,321 28,118 114 64,553 42,664 30,649 94 73,407 Business and government loans - 4,573 2,305 6,878 - 3,412 1,945 5,357 Other Assets (1) 3,274 85 - 3,359 5,328 117 - 5,445 Fair Value Liabilities Securities sold but not yet purchased 21,383 7,114 - 28,497 19,740 9,636 - 29,376 Structured note liabilities (2) - 22,085 - 22,085 - 18,073 - 18,073 Other liabilities (3) - 2,087 13 2,100 - 1,285 - 1,285 21,383 31,286 13 52,682 19,740 28,994 - 48,734 Derivative Assets Interest rate contracts 12 10,213 - 10,225 13 14,916 - 14,929 Foreign exchange contracts 3 15,667 - 15,670 1 10,825 - 10,826 Commodity contracts 352 5,582 - 5,934 123 2,465 - 2,588 Equity contracts 965 3,534 - 4,499 750 7,711 - 8,461 Credit default swaps - 3 - 3 - 11 - 11 1,332 34,999 - 36,331 887 35,928 - 36,815 Derivative Liabilities Interest rate contracts 6 7,761 - 7,767 22 10,871 - 10,893 Foreign exchange contracts 11 11,998 - 12,009 3 10,609 - 10,612 Commodity contracts 638 1,042 - 1,680 350 1,983 - 2,333 Equity contracts 565 7,140 - 7,705 456 6,067 - 6,523 Credit default swaps - 2 4 6 - 10 4 14 1,220 27,943 4 29,167 831 29,540 4 30,375 (1) Other assets include precious metals and certain receivables measured at fair value included in other assets, other, in our Consolidated Balance Sheet. (2) These structured note liabilities included in deposits have been designated at FVTPL. (3) Other liabilities include investment contract liabilities in our insurance business, certain payables and metals deposits that have been designated at FVTPL, as well as certain securitization and structured entities’ liabilities measured at FVTPL. Certain comparative figures have been reclassified to conform with the current period’s presentation.
Significant Unobservable Inputs in Level 3 Instrument Valuations	Quantitative Information about Level 3 Fair Value Measurements The table below presents the fair values of our significant Level 3 financial instruments that are measured at fair value on a recurring basis, the valuation techniques used to determine their fair values and the value ranges of significant unobservable inputs used in the valuations. We have not applied any other reasonably possible alternative assumptions to the significant Level 3 categories of private equity investments, as the net asset values are provided by the investment or fund managers. Range of input values (1) As at July 31, 2021 (Canadian $ in millions, except as noted) Reporting line in fair value hierarchy table Fair value Valuation techniques Significant unobservable inputs Low High Private equity (2) Corporate equity 2,276 Net Asset Value Net Asset Value na na EV/EBITDA Multiple 6 16 Loans (3) Business and government loans 2,305 Discounted cash flows Discount margin 50bps 144bps NHA MBS and U.S. agency MBS and CMO NHA MBS and U.S. agency MBS and CMO 794 Discounted cash flows Prepayment rate 4% 38% Market Comparable Comparability Adjustment (4) (4.64) 4.53 (1) The low and high input values represent the highest and lowest actual level of inputs used to value a group of financial instruments in a particular product category. These input ranges do not reflect the level of input uncertainty, but are affected by the specific underlying instruments within each product category. The input ranges will therefore vary from period to period based on the characteristics of the underlying instruments held at each balance sheet date. (2) Included in private equity is $457 million of Federal Reserve Bank and U.S. Federal Home Loan Bank shares that we carry at cost as at July 31, 2021 ($487 million as at October 31, 2020), which approximates fair value, and are held to meet regulatory requirements. (3) The impact of assuming a 10 basis point increase or decrease in discount margin for business and government loans is $4 million as at July 31, 2021 ($3 million as at October 31, 2020). (4) Range of input values represents price per security adjustment. na - not applicable
Summary of Transfers Between Level 1 and Level 2	The following table presents significant transfers between Level 1 and Level 2 for the three and nine months ended July 31, 2021 and July 31, 2020. (Canadian $ in millions) For the three months ended July 31, 2021 July 31, 2020 Level 1 to Level 2 Level 2 to Level 1 Level 1 to Level 2 Level 2 to Level 1 Trading Securities 639 1,473 994 2,682 FVTPL Securities 153 403 19 241 FVOCI Securities 1,016 1,917 1,768 4,294 Securities sold but not yet purchased 197 648 681 2,067 (Canadian $ in millions) For the nine months ended July 31, 2021 July 31, 2020 Level 1 to Level 2 Level 2 to Level 1 Level 1 to Level 2 Level 2 to Level 1 Trading Securities 4,067 11,009 5,761 3,952 FVTPL Securities 361 804 518 302 FVOCI Securities 6,856 10,890 9,032 7,012 Securities sold but not yet purchased 1,198 5,905 4,432 2,982
Summary of Changes in Level 3 Instruments Carried At Fair Value	The tables below present a reconciliation of all changes in Level 3 financial instruments for the three and nine months ended July 31, 2021 and July 31, 2020, including realized and unrealized gains (losses) included in earnings and other comprehensive income as well as transfers into and out of Level 3. Transfers from Level 2 into Level 3 were due to an increase in unobservable market inputs used in pricing the securities. Transfers out of Level 3 into Level 2 were due to an increase in observable market inputs used in pricing the securities. Change in fair value For the three months ended July 31, 2021 (Canadian $ in millions) Balance April 30, 2021 Included in Included in other comprehensive income (1) Issuances/ Purchases Sales (2) Maturities/ Settlement Transfers into Level 3 Transfers out of Level 3 Fair Value as at July 31, 2021 Change in unrealized gains (losses) recorded in income for instruments still held (3) Trading Securities NHA MBS and U.S. agency MBS and CMO 702 (78 ) 11 441 (255 ) - 35 (62 ) 794 5 Corporate debt 3 - - - (1 ) - - - 2 - Total trading securities 705 (78 ) 11 441 (256 ) - 35 (62 ) 796 5 FVTPL Securities Corporate equity 2,048 158 20 175 (106 ) - - (19 ) 2,276 149 Total FVTPL securities 2,048 158 20 175 (106 ) - - (19 ) 2,276 149 FVOCI Securities Issued or guaranteed by: U.S. states, municipalities and agencies 1 - - - - - - - 1 na Corporate equity 100 - 9 4 - - - - 113 na Total FVOCI securities 101 - 9 4 - - - - 114 na Business and government loans 2,841 - 45 113 - (694 ) - - 2,305 - Other Liabilities - - - - - - 13 - 13 - Derivative Liabilities Credit default swaps 4 - - - - - - - 4 - Total derivative liabilities 4 - - - - - - - 4 - Change in fair value For the nine months ended July 31, 2021 (Canadian $ in millions) Balance October 31, 2020 Included in earnings Included in other comprehensive income (1) Issuances/ Purchases Sales (2) Maturities/ Transfers into Level 3 Transfers out of Level 3 Fair Value as at July 31, 2021 Change in unrealized gains (losses) recorded in income for instruments still held (3) Trading Securities NHA MBS and U.S. agency MBS and CMO 803 (172 ) (50 ) 1,206 (938 ) - 106 (161 ) 794 24 Corporate debt - - - 3 (1 ) - - - 2 - Total trading securities 803 (172 ) (50 ) 1,209 (939 ) - 106 (161 ) 796 24 FVTPL Securities Corporate equity 1,903 217 (81 ) 453 (193 ) (4 ) - (19 ) 2,276 262 Total FVTPL 1,903 217 (81 ) 453 (193 ) (4 ) - (19 ) 2,276 262 FVOCI Securities Issued or guaranteed by: U.S. states, municipalities and agencies 1 - - - - - - - 1 na Corporate equity 93 - 9 11 - - - - 113 na Total FVOCI securities 94 - 9 11 - - - - 114 na Business and government loans 1,945 - (150 ) 1,812 - (1,302 ) - - 2,305 - Other Liabilities - - - - - - 13 - 13 - Derivative Liabilities Credit default swaps 4 - - - - - - - 4 - Total derivative liabilities 4 - - - - - - - 4 - (1) Foreign exchange translation on trading securities held by foreign subsidiaries is included in other comprehensive income, net foreign operations. (2) Includes proceeds received on securities sold but not yet purchased. (3) Changes in unrealized gains (losses) on Trading and FVTPL securities still held on July 31, 2021 are included in earnings for the period. Unrealized gains (losses) recognized on Level 3 financial instruments may be offset by (losses) gains on economic hedge contracts. na – not applicable Change in fair value For the three months ended July 31, 2020 (Canadian $ in millions) Balance Included in earnings Included in other comprehensive Issuances/ Purchases Sales (2) Maturities/ Settlement Transfers into Level 3 Transfers out of Level 3 Fair Value as at July 31, 2020 Change in unrealized gains (losses) recorded for instruments still held (3) Trading Securities NHA MBS and U.S. agency MBS and CMO 487 (115 ) (18 ) 362 (151 ) - 41 (22 ) 584 (74 ) Corporate debt 48 10 (2 ) - (56 ) - - - - - Total trading securities 535 (105 ) (20 ) 362 (207 ) - 41 (22 ) 584 (74 ) FVTPL Securities Corporate equity 2,062 (23 ) (57 ) 58 (233 ) - - - 1,807 2 Total FVTPL 2,062 (23 ) (57 ) 58 (233 ) - - - 1,807 2 FVOCI Securities Issued or guaranteed by: U.S. states, municipalities and agencies 1 - - - - - - - 1 na Corporate equity 83 - - 4 - - - - 87 na Total FVOCI securities 84 - - 4 - - - - 88 na Business and government loans 2,028 - 95 765 - (685 ) - - 2,203 - Other Liabilities - - - - - - - - - - Derivative Liabilities Credit default swaps 4 - - - - - - (1 ) 3 - Total derivative liabilities 4 - - - - - - (1 ) 3 - Change in fair value For the nine months ended July 31, 2020 (Canadian $ in millions) Balance October 31, 2019 Included in earnings Included in other comprehensive income (1) Issuances/ Purchases Sales (2) Maturities/ Settlement Transfers into Level 3 Transfers out of Level 3 Fair Value as at July 31, 2020 Change in unrealized gains (losses) recorded in income for instruments still held (3) Trading Securities NHA MBS and U.S. agency MBS and CMO 538 (245 ) 12 811 (540 ) - 202 (194 ) 584 (158 ) Corporate debt 7 10 (2 ) 50 (68 ) - 3 - - (1 ) Total trading securities 545 (235 ) 10 861 (608 ) - 205 (194 ) 584 (159 ) FVTPL Securities Corporate equity 1,984 (27 ) 23 244 (418 ) - 1 - 1,807 7 Total FVTPL 1,984 (27 ) 23 244 (418 ) - 1 - 1,807 7 FVOCI Securities Issued or guaranteed by: U.S. states, municipalities and agencies 1 - - - - - - - 1 na Corporate equity 81 - - 6 - - - - 87 na Total FVOCI securities 82 - - 6 - - - - 88 na Business and government loans 1,736 (3 ) 183 1,705 - (1,418 ) - - 2,203 - Other Liabilities - - - - - - - - - - Derivative Liabilities Credit default swaps 1 - - - - - 3 (1 ) 3 - Total derivative liabilities 1 - - - - - 3 (1 ) 3 - (1) Foreign exchange translation on trading securities held by foreign subsidiaries is included in other comprehensive income, net foreign operations. (2) Includes proceeds received on securities sold but not yet purchased. (3) Changes in unrealized gains (losses) on Trading and FVTPL securities still held on July 31, 2020 are included in earnings for the period. Unrealized gains (losses) recognized on Level 3 financial instruments may be offset by (losses) gains on economic hedge contracts. na – not applicable

Capital Management (Tables)

Capital Management (Tables)	9 Months Ended
	Jul. 31, 2021
Text Block [Abstract]
Summary of Regulatory Capital Measure and Risk-Weighted Assets	Regulatory Capital Measures, Risk-Weighted Assets and Leverage Exposures (Canadian $ in millions, except as noted) July 31, 2021 October 31, 2020 Common Equity Tier 1 (CET1) Capital 43,349 40,077 Tier 1 Capital 48,826 45,840 Total Capital 56,203 54,661 Risk-Weighted Assets 322,529 336,607 Leverage Exposures 969,824 953,640 CET 1 Capital Ratio 13.4% 11.9% Tier 1 Capital Ratio 15.1% 13.6% Total Capital Ratio 17.4% 16.2% Leverage Ratio 5.0% 4.8%

Employee Compensation (Tables)

Employee Compensation (Tables)	9 Months Ended
	Jul. 31, 2021
Text Block [Abstract]
Summary of Ranges of Values used for each Option Pricing Assumption	To determine the fair value of the stock option tranches (i.e. the portion that vests each year) on the grant date, the following ranges of values were used for each option pricing assumption: For stock options granted during the nine months ended July 31, 2021 July 31, 2020 Expected dividend yield 4.9% 4.3% Expected share price volatility 20.6% - 20.7% 15.4% Risk-free rate of return 1.0% 1.9% - 2.0% Expected period until exercise (in years) 6.5 - 7.0 6.5 - 7.0 Exercise price ($) 97.14 101.47
Summary of Pension and Other Employee Future Benefit Expenses	Pension and Other Employee Future Benefit Expenses Pension and other employee future benefit expenses are determined as follows: (Canadian $ in millions) Pension benefit plans Other employee future benefit plans For the three months ended July 31, 2021 July 31, 2020 July 31, 2021 July 31, 2020 Current service cost 67 62 2 2 Net interest expense on net defined benefit (asset) liability 2 1 8 8 Administrative expenses 1 1 - - Benefits expense 70 64 10 10 Canada and Quebec pension plan expense 24 22 - - Defined contribution expense 33 37 - - Total pension and other employee future benefit expenses 127 123 10 10 (Canadian $ in millions) Pension benefit plans Other employee future benefit plans For the nine months ended July 31, 2021 July 31, 2020 July 31, 2021 July 31, 2020 Current service cost 201 187 6 8 Net interest expense on net defined benefit (asset) liability 6 1 23 24 Administrative expenses 3 3 - - Benefits expense 210 191 29 32 Canada and Quebec pension plan expense 76 75 - - Defined contribution expense 126 135 - - Total pension and other employee future benefit expenses 412 401 29 32

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Jul. 31, 2021
Text Block [Abstract]
Summary of Basic and Diluted Earnings Per Share	Basic Earnings Per Common Share (Canadian $ in millions, except as noted) For the three months ended For the nine months ended July 31, 2021 July 31, 2020 July 31, 2021 July 31, 2020 Net income 2,275 1,232 5,595 3,513 Dividends on preferred shares and distributions payable on other equity instruments (61 ) (73 ) (185 ) (195) Net income available to common shareholders 2,214 1,159 5,410 3,318 Weighted-average number of common shares outstanding (in thousands) 647,178 641,300 646,808 640,129 Basic earnings per common share (Canadian $) 3.42 1.81 8.36 5.18 Diluted Earnings Per Common Share Net income available to common shareholders adjusted for impact of dilutive instruments 2,214 1,159 5,410 3,318 Weighted-average number of common shares outstanding (in thousands) 647,178 641,300 646,808 640,129 Effect of dilutive instruments Stock options potentially exercisable (1) 6,213 2,400 6,585 3,473 Common shares potentially repurchased (4,394 ) (2,046 ) (5,229 ) (2,721) Weighted-average number of diluted common shares outstanding (in thousands) 648,997 641,654 648,164 640,881 Diluted earnings per common share (Canadian $) 3.41 1.81 8.35 5.18 (1) In computing diluted earnings per share, we did not exclude any stock options outstanding for the three and

Operating Segmentation (Tables)

Operating Segmentation (Tables)	9 Months Ended
	Jul. 31, 2021
Text Block [Abstract]
Schedule of Operating Segments	Our results and average assets, grouped by operating segment, are as follows: (Canadian $ in millions) For the three months ended July 31, 2021 Canadian P&C U.S. P&C BMO WM BMO CM Corporate Services (1) Total Net interest income (2) 1,660 1,048 247 696 (130 ) 3,521 Non-interest 581 304 2,179 888 89 4,041 Total Revenue 2,241 1,352 2,426 1,584 (41 ) 7,562 Provision for (recovery of) credit losses on impaired loans 101 (9 ) - (19 ) (2 ) 71 Recovery of credit losses on performing loans (7 ) (53 ) (2 ) (75 ) (4 ) (141 ) Total provision for (recovery of) credit losses 94 (62 ) (2 ) (94 ) (6 ) (70 ) Insurance claims, commissions and changes in policy benefit liabilities - - 984 - - 984 Depreciation and amortization 131 119 66 68 - 384 Other non-interest 915 570 847 850 118 3,300 Income (loss) before taxes 1,101 725 531 760 (153 ) 2,964 Provision for (recovery of) income taxes 286 172 130 202 (101 ) 689 Reported net income (loss) 815 553 401 558 (52 ) 2,275 Average Assets 265,639 125,840 48,053 367,900 162,811 970,243 For the three months ended July 31, 2020 Canadian P&C U.S. P&C BMO WM BMO CM Corporate Services (1) Total Net interest income (2) 1,509 1,107 229 952 (262 ) 3,535 Non-interest 453 292 2,255 576 78 3,654 Total Revenue 1,962 1,399 2,484 1,528 (184 ) 7,189 Provision for credit losses on impaired loans 257 109 1 79 - 446 Provision for credit losses on performing loans 313 223 7 58 7 608 Total provision for credit losses 570 332 8 137 7 1,054 Insurance claims, commissions and changes in policy benefit liabilities - - 1,189 - - 1,189 Depreciation and amortization 126 137 73 64 - 400 Other non-interest 835 615 764 761 69 3,044 Income (loss) before taxes 431 315 450 566 (260 ) 1,502 Provision for (recovery of) income taxes 112 52 109 140 (143 ) 270 Reported net income (loss) 319 263 341 426 (117 ) 1,232 Average Assets 252,028 140,615 46,308 379,131 159,682 977,764 (Canadian $ in millions) For the nine months ended July 31, 2021 Canadian P&C U.S. P&C BMO WM BMO CM Corporate Services (1) Total Net interest income (2) 4,849 3,194 723 2,242 (454 ) 10,554 Non-interest 1,633 935 4,795 2,454 242 10,059 Total Revenue 6,482 4,129 5,518 4,696 (212 ) 20,613 Provision for (recovery of) credit losses on impaired loans 404 17 3 20 (3 ) 441 Recovery of credit losses on performing loans (22 ) (133 ) (10 ) (126 ) (4 ) (295 ) Total provision for (recovery of) credit losses 382 (116 ) (7 ) (106 ) (7 ) 146 Insurance claims, commissions and changes in policy benefit liabilities - - 1,302 - - 1,302 Depreciation and amortization 390 365 213 201 - 1,169 Non-interest 2,582 1,689 2,547 2,432 1,287 10,537 Income (loss) before taxes 3,128 2,191 1,463 2,169 (1,492 ) 7,459 Provision for (recovery of) income taxes 812 514 358 565 (385 ) 1,864 Reported net income (loss) 2,316 1,677 1,105 1,604 (1,107 ) 5,595 Average Assets 259,813 128,722 47,761 371,046 166,462 973,804 For the nine months ended July 31, 2020 Canadian U.S. P&C BMO WM BMO CM Corporate Total Net interest income (2) 4,561 3,287 672 2,503 (582 ) 10,441 Non-interest 1,443 912 4,727 1,445 232 8,759 Total Revenue 6,004 4,199 5,399 3,948 (350 ) 19,200 Provision for credit losses on impaired loans 607 365 4 205 2 1,183 Provision for credit losses on performing loans 612 315 13 390 8 1,338 Provision for credit losses 1,219 680 17 595 10 2,521 Insurance claims, commissions and changes in policy benefit liabilities - - 1,708 - - 1,708 Depreciation and amortization 385 427 220 179 - 1,211 Non-interest 2,539 1,903 2,417 2,256 303 9,418 Income (loss) before taxes 1,861 1,189 1,037 918 (663 ) 4,342 Provision for (recovery of) income taxes 481 236 261 210 (359 ) 829 Reported net income (loss) 1,380 953 776 708 (304 ) 3,513 Average Assets 251,325 139,196 45,234 370,363 129,399 935,517 (1) Corporate Services includes Technology and Operations. (2) Operating groups report on a taxable equivalent basis (teb). Revenue and the provision for income taxes are increased on tax-exempt before-tax tax-exempt

Basis of Presentation - Summary

Basis of Presentation - Summary of Quantitative Information for Financial Instruments (Detail) - Interbank Offer Rate Reform [Member] - CAD ($) $ in Millions	Apr. 30, 2021	Nov. 01, 2020
Libor [Member] | U.S. dollars [member]
Disclosure Detail Of Quantitative Information for Financial Instruments [Line Items]
Non-derivative assets	$ 75,455	$ 100,521
Non-derivative liabilities	2,933	7,435
Derivative notional amounts	1,112,747	1,570,534
Authorized and committed loan commitments	$ 45,794	68,449
Libor [Member] | GBP [Member]
Disclosure Detail Of Quantitative Information for Financial Instruments [Line Items]
Non-derivative assets		868
Non-derivative liabilities		692
Derivative notional amounts		20,972
Authorized and committed loan commitments		194
Others [Member] | Other Currencies [Member]
Disclosure Detail Of Quantitative Information for Financial Instruments [Line Items]
Non-derivative assets		1,225
Derivative notional amounts		6,702
Authorized and committed loan commitments		$ 23,633

Basis of Presentation - Summa_2

Basis of Presentation - Summary of Quantitative Information for Financial Instruments (Parenthetical) (Detail) $ in Millions	Jul. 31, 2021CAD ($)
United States of America, Dollar [member] | Loan Commitments Currently Referencing Other Libor Exposures [Member] | Impact in June 30, 2023 Cessation Date [Member]
Disclosure Detail Of Quantitative Information for Financial Instruments [Line Items]
Authorized loan commitments	$ 8,746

Securities - Additional Informa

Securities - Additional Information (Detail) - CAD ($) $ in Millions	Jul. 31, 2021	Apr. 30, 2021	Oct. 31, 2020
Disclosure of financial assets [line items]
Fair value through profit or loss ("FVTPL") securities	$ 14,239	$ 13,331	$ 13,568
Amortized cost	48,727	46,744	48,466
FVOCI Securities	64,553	$ 61,172	73,407
Debt securities [member]
Disclosure of financial assets [line items]
Allowance for credit losses of amortized cost	1		1
Allowance for credit losses of FVOCI securities	3		4
Mandatorily measured at fair value [member]
Disclosure of financial assets [line items]
Fair value through profit or loss ("FVTPL") securities	2,788		2,420
Related to securities held by insurance subsidiaries [member]
Disclosure of financial assets [line items]
Fair value through profit or loss ("FVTPL") securities	$ 11,451		$ 11,148

Securities - Schedule of Unreal

Securities - Schedule of Unrealized Gains and Losses (Detail) - CAD ($) $ in Millions	Jul. 31, 2021	Apr. 30, 2021	Oct. 31, 2020
Disclosure of financial assets [line items]
FVOCI Securities	$ 64,553	$ 61,172	$ 73,407
Cost/Amortized cost [member]
Disclosure of financial assets [line items]
FVOCI Securities	63,404		71,529
Gross Unrealized Gains [Member]
Disclosure of financial assets [line items]
FVOCI Securities	1,274		1,936
Gross Unrealized Losses [Member]
Disclosure of financial assets [line items]
FVOCI Securities	125		58
Fair value [member]
Disclosure of financial assets [line items]
FVOCI Securities	64,553		73,407
Canadian federal government [member] | Cost/Amortized cost [member]
Disclosure of financial assets [line items]
FVOCI Securities	14,503		22,240
Canadian federal government [member] | Gross Unrealized Gains [Member]
Disclosure of financial assets [line items]
FVOCI Securities	124		211
Canadian federal government [member] | Gross Unrealized Losses [Member]
Disclosure of financial assets [line items]
FVOCI Securities	17		1
Canadian federal government [member] | Fair value [member]
Disclosure of financial assets [line items]
FVOCI Securities	14,610		22,450
Canadian Provincial And Municipal Governments [member] | Cost/Amortized cost [member]
Disclosure of financial assets [line items]
FVOCI Securities	2,630		4,628
Canadian Provincial And Municipal Governments [member] | Gross Unrealized Gains [Member]
Disclosure of financial assets [line items]
FVOCI Securities	45		119
Canadian Provincial And Municipal Governments [member] | Gross Unrealized Losses [Member]
Disclosure of financial assets [line items]
FVOCI Securities	1
Canadian Provincial And Municipal Governments [member] | Fair value [member]
Disclosure of financial assets [line items]
FVOCI Securities	2,674		4,747
US federal Government [member] | Cost/Amortized cost [member]
Disclosure of financial assets [line items]
FVOCI Securities	20,183		16,881
US federal Government [member] | Gross Unrealized Gains [Member]
Disclosure of financial assets [line items]
FVOCI Securities	590		844
US federal Government [member] | Gross Unrealized Losses [Member]
Disclosure of financial assets [line items]
FVOCI Securities	77		31
US federal Government [member] | Fair value [member]
Disclosure of financial assets [line items]
FVOCI Securities	20,696		17,694
US State Municipal And Agencies Debt [member] | Cost/Amortized cost [member]
Disclosure of financial assets [line items]
FVOCI Securities	4,296		5,132
US State Municipal And Agencies Debt [member] | Gross Unrealized Gains [Member]
Disclosure of financial assets [line items]
FVOCI Securities	117		147
US State Municipal And Agencies Debt [member] | Gross Unrealized Losses [Member]
Disclosure of financial assets [line items]
FVOCI Securities	1		3
US State Municipal And Agencies Debt [member] | Fair value [member]
Disclosure of financial assets [line items]
FVOCI Securities	4,412		5,276
Other governments [member] | Cost/Amortized cost [member]
Disclosure of financial assets [line items]
FVOCI Securities	6,520		7,222
Other governments [member] | Gross Unrealized Gains [Member]
Disclosure of financial assets [line items]
FVOCI Securities	88		168
Other governments [member] | Gross Unrealized Losses [Member]
Disclosure of financial assets [line items]
FVOCI Securities	11		9
Other governments [member] | Fair value [member]
Disclosure of financial assets [line items]
FVOCI Securities	6,597		7,381
National housing act mortgage backed securities [member] | Cost/Amortized cost [member]
Disclosure of financial assets [line items]
FVOCI Securities	1,287		1,583
National housing act mortgage backed securities [member] | Gross Unrealized Gains [Member]
Disclosure of financial assets [line items]
FVOCI Securities	13		46
National housing act mortgage backed securities [member] | Gross Unrealized Losses [Member]
Disclosure of financial assets [line items]
FVOCI Securities	1
National housing act mortgage backed securities [member] | Fair value [member]
Disclosure of financial assets [line items]
FVOCI Securities	1,299		1,629
US agency MBS and CMO [member] | Cost/Amortized cost [member]
Disclosure of financial assets [line items]
FVOCI Securities	11,323		10,600
US agency MBS and CMO [member] | Gross Unrealized Gains [Member]
Disclosure of financial assets [line items]
FVOCI Securities	242		307
US agency MBS and CMO [member] | Gross Unrealized Losses [Member]
Disclosure of financial assets [line items]
FVOCI Securities	11		4
US agency MBS and CMO [member] | Fair value [member]
Disclosure of financial assets [line items]
FVOCI Securities	11,554		10,903
Corporate debt [member] | Cost/Amortized cost [member]
Disclosure of financial assets [line items]
FVOCI Securities	2,561		3,153
Corporate debt [member] | Gross Unrealized Gains [Member]
Disclosure of financial assets [line items]
FVOCI Securities	43		91
Corporate debt [member] | Gross Unrealized Losses [Member]
Disclosure of financial assets [line items]
FVOCI Securities	6		10
Corporate debt [member] | Fair value [member]
Disclosure of financial assets [line items]
FVOCI Securities	2,598		3,234
Corporate equity [member] | Cost/Amortized cost [member]
Disclosure of financial assets [line items]
FVOCI Securities	101		90
Corporate equity [member] | Gross Unrealized Gains [Member]
Disclosure of financial assets [line items]
FVOCI Securities	12		3
Corporate equity [member] | Fair value [member]
Disclosure of financial assets [line items]
FVOCI Securities	$ 113		$ 93

Securities - Summary of Interes

Securities - Summary of Interest Income Calculated Using Effective Interest Method (Detail) - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Disclosure Of interest, dividend and fee income [Line Items]
Total	$ 215	$ 329	$ 675	$ 1,278
Financial assets at fair value through other comprehensive income, category [member]
Disclosure Of interest, dividend and fee income [Line Items]
Total	114	185	366	823
Financial assets at amortised cost, category [member]
Disclosure Of interest, dividend and fee income [Line Items]
Total	$ 101	$ 144	$ 309	$ 455

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses - Additional Information (Detail) - CAD ($) $ in Millions	9 Months Ended
	Jul. 31, 2021	Oct. 31, 2020
Disclosure of detailed information about financial instruments [line items]
Allowances for credit losses	$ 3,248	$ 3,814
2021 [member] | Adverse scenario [member] | United States [member]
Disclosure of detailed information about financial instruments [line items]
Percentage contraction in real gdp	3.00%
2021 [member] | Adverse scenario [member] | Canada [member]
Disclosure of detailed information about financial instruments [line items]
Percentage contraction in real gdp	3.00%
2020 [member] | Adverse scenario [member] | United States [member]
Disclosure of detailed information about financial instruments [line items]
Percentage contraction in real gdp	5.00%
2020 [member] | Adverse scenario [member] | Canada [member]
Disclosure of detailed information about financial instruments [line items]
Percentage contraction in real gdp	5.00%
Over 12 months [member] | Base case scenario [member] | United States [member]
Disclosure of detailed information about financial instruments [line items]
Percentage contraction in real gdp	7.30%
Over 12 months [member] | Base case scenario [member] | Canada [member]
Disclosure of detailed information about financial instruments [line items]
Percentage contraction in real gdp	7.30%
Over 12 months [member] | Adverse scenario [member] | United States [member]
Disclosure of detailed information about financial instruments [line items]
Percentage contraction in real gdp	1.10%
Within 1 year [member] | Base case scenario [member] | United States [member]
Disclosure of detailed information about financial instruments [line items]
Percentage contraction in real gdp	3.90%
Within 1 year [member] | Base case scenario [member] | Canada [member]
Disclosure of detailed information about financial instruments [line items]
Percentage contraction in real gdp	3.90%
Within 1 year [member] | Adverse scenario [member] | Canada [member]
Disclosure of detailed information about financial instruments [line items]
Percentage contraction in real gdp	1.10%
Allowance for credit losses related to loans [member]
Disclosure of detailed information about financial instruments [line items]
Allowances for credit losses	$ 2,824	3,303
Allowance for credit losses related to other credit instruments [member]
Disclosure of detailed information about financial instruments [line items]
Allowances for credit losses	424	511
Related to performing loans, assuming 100% base case scenario [member]
Disclosure of detailed information about financial instruments [line items]
Allowances for credit losses	2,686	3,075
Modelled allowance account for credit losses of financial assets based on assumptions	1,850	2,375
Related to performing loans, assuming 100% adverse scenario [member]
Disclosure of detailed information about financial instruments [line items]
Allowances for credit losses	2,686	3,075
Modelled allowance account for credit losses of financial assets based on assumptions	4,225	4,875
Performing loans, stage one scenario [member]
Disclosure of detailed information about financial instruments [line items]
Allowances for credit losses	2,686	3,075
Modelled allowance account for credit losses of financial assets based on assumptions	$ 1,925	$ 2,300
Expected credit loss period	12 months

Loans and Allowance for Credi_4

Loans and Allowance for Credit Losses - Summary of Credit Risk Exposures for Loans Carried at Amortized Cost, FVOCI or FVTPL (Detail) - CAD ($) $ in Millions	Jul. 31, 2021	Oct. 31, 2020
Disclosure of credit risk exposure [line items]
Allowance for credit losses	$ 3,248	$ 3,814
Residential mortgages [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	134,273	126,882
Residential mortgages [member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	101	142
Residential mortgages [member] | Gross carrying amount [member] | Default and impaired [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	384	409
Residential mortgages [member] | Gross carrying amount [member] | Exceptionally low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	2	1
Residential mortgages [member] | Gross carrying amount [member] | Very low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	92,230	79,724
Residential mortgages [member] | Gross carrying amount [member] | Low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	25,183	26,971
Residential mortgages [member] | Gross carrying amount [member] | Medium probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	15,019	18,021
Residential mortgages [member] | Gross carrying amount [member] | High probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	415	618
Residential mortgages [member] | Gross carrying amount [member] | Not Rated [Member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	1,141	1,280
Consumer installment and other personal loans [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	74,505	69,480
Consumer installment and other personal loans [member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	587	668
Consumer installment and other personal loans [member] | Gross carrying amount [member] | Default and impaired [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	299	340
Consumer installment and other personal loans [member] | Gross carrying amount [member] | Exceptionally low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	1,496	1,581
Consumer installment and other personal loans [member] | Gross carrying amount [member] | Very low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	29,763	26,682
Consumer installment and other personal loans [member] | Gross carrying amount [member] | Low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	23,647	21,520
Consumer installment and other personal loans [member] | Gross carrying amount [member] | Medium probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	14,722	14,658
Consumer installment and other personal loans [member] | Gross carrying amount [member] | High probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	1,753	1,899
Consumer installment and other personal loans [member] | Gross carrying amount [member] | Not Rated [Member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	3,412	3,468
Credit Card Loans [Member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	7,573	7,556
Credit Card Loans [Member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	293	333
Credit Card Loans [Member] | Gross carrying amount [member] | Exceptionally low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	2,468	2,252
Credit Card Loans [Member] | Gross carrying amount [member] | Very low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	413	1,121
Credit Card Loans [Member] | Gross carrying amount [member] | Low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	1,772	1,047
Credit Card Loans [Member] | Gross carrying amount [member] | Medium probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	2,374	2,510
Credit Card Loans [Member] | Gross carrying amount [member] | High probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	357	435
Credit Card Loans [Member] | Gross carrying amount [member] | Not Rated [Member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	482	524
Business and government loans [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	253,528	256,995
Business and government loans [member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	1,843	2,160
Business and government loans [member] | Gross carrying amount [member] | Default and impaired [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	1,747	2,889
Business and government loans [member] | Gross carrying amount [member] | Investment grade [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	147,539	132,342
Business and government loans [member] | Gross carrying amount [member] | Sub investment grade [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	99,159	115,303
Business and government loans [member] | Gross carrying amount [member] | Watch list [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	6,926	8,621
Loan commitments and financial guarantee contracts issued [member]
Disclosure of credit risk exposure [line items]
Commitments and financial guarantee contracts	207,340	207,451
Loan commitments and financial guarantee contracts issued [member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	424	511
Loan commitments and financial guarantee contracts issued [member] | Gross carrying amount [member] | Default and impaired [member]
Disclosure of credit risk exposure [line items]
Commitments and financial guarantee contracts	792	1,261
Loan commitments and financial guarantee contracts issued [member] | Gross carrying amount [member] | Investment grade [member]
Disclosure of credit risk exposure [line items]
Commitments and financial guarantee contracts	149,085	139,769
Loan commitments and financial guarantee contracts issued [member] | Gross carrying amount [member] | Sub investment grade [member]
Disclosure of credit risk exposure [line items]
Commitments and financial guarantee contracts	54,908	62,071
Loan commitments and financial guarantee contracts issued [member] | Gross carrying amount [member] | Watch list [member]
Disclosure of credit risk exposure [line items]
Commitments and financial guarantee contracts	2,979	4,861
Stage One [member] | Residential mortgages [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	127,086	116,599
Stage One [member] | Residential mortgages [member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	51	51
Stage One [member] | Residential mortgages [member] | Gross carrying amount [member] | Exceptionally low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	2	1
Stage One [member] | Residential mortgages [member] | Gross carrying amount [member] | Very low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	91,813	79,295
Stage One [member] | Residential mortgages [member] | Gross carrying amount [member] | Low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	22,578	24,490
Stage One [member] | Residential mortgages [member] | Gross carrying amount [member] | Medium probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	11,544	11,560
Stage One [member] | Residential mortgages [member] | Gross carrying amount [member] | High probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	112	172
Stage One [member] | Residential mortgages [member] | Gross carrying amount [member] | Not Rated [Member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	1,088	1,132
Stage One [member] | Consumer installment and other personal loans [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	68,999	63,121
Stage One [member] | Consumer installment and other personal loans [member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	127	134
Stage One [member] | Consumer installment and other personal loans [member] | Gross carrying amount [member] | Exceptionally low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	1,468	1,550
Stage One [member] | Consumer installment and other personal loans [member] | Gross carrying amount [member] | Very low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	29,735	26,645
Stage One [member] | Consumer installment and other personal loans [member] | Gross carrying amount [member] | Low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	23,142	20,935
Stage One [member] | Consumer installment and other personal loans [member] | Gross carrying amount [member] | Medium probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	10,953	10,324
Stage One [member] | Consumer installment and other personal loans [member] | Gross carrying amount [member] | High probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	465	429
Stage One [member] | Consumer installment and other personal loans [member] | Gross carrying amount [member] | Not Rated [Member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	3,363	3,372
Stage One [member] | Credit Card Loans [Member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	6,647	6,389
Stage One [member] | Credit Card Loans [Member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	60	61
Stage One [member] | Credit Card Loans [Member] | Gross carrying amount [member] | Exceptionally low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	2,468	2,252
Stage One [member] | Credit Card Loans [Member] | Gross carrying amount [member] | Very low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	412	1,106
Stage One [member] | Credit Card Loans [Member] | Gross carrying amount [member] | Low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	1,636	899
Stage One [member] | Credit Card Loans [Member] | Gross carrying amount [member] | Medium probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	1,649	1,611
Stage One [member] | Credit Card Loans [Member] | Gross carrying amount [member] | High probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	60	58
Stage One [member] | Credit Card Loans [Member] | Gross carrying amount [member] | Not Rated [Member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	482	524
Stage One [member] | Business and government loans [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	228,426	213,787
Stage One [member] | Business and government loans [member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	584	510
Stage One [member] | Business and government loans [member] | Gross carrying amount [member] | Investment grade [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	146,024	129,100
Stage One [member] | Business and government loans [member] | Gross carrying amount [member] | Sub investment grade [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	82,986	85,197
Stage One [member] | Loan commitments and financial guarantee contracts issued [member]
Disclosure of credit risk exposure [line items]
Commitments and financial guarantee contracts	192,621	179,580
Stage One [member] | Loan commitments and financial guarantee contracts issued [member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	209	211
Stage One [member] | Loan commitments and financial guarantee contracts issued [member] | Gross carrying amount [member] | Investment grade [member]
Disclosure of credit risk exposure [line items]
Commitments and financial guarantee contracts	148,061	138,141
Stage One [member] | Loan commitments and financial guarantee contracts issued [member] | Gross carrying amount [member] | Sub investment grade [member]
Disclosure of credit risk exposure [line items]
Commitments and financial guarantee contracts	44,769	41,650
Stage Two [Member] | Residential mortgages [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	6,816	9,890
Stage Two [Member] | Residential mortgages [member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	37	75
Stage Two [Member] | Residential mortgages [member] | Gross carrying amount [member] | Very low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	417	429
Stage Two [Member] | Residential mortgages [member] | Gross carrying amount [member] | Low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	2,605	2,481
Stage Two [Member] | Residential mortgages [member] | Gross carrying amount [member] | Medium probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	3,475	6,461
Stage Two [Member] | Residential mortgages [member] | Gross carrying amount [member] | High probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	303	446
Stage Two [Member] | Residential mortgages [member] | Gross carrying amount [member] | Not Rated [Member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	53	148
Stage Two [Member] | Consumer installment and other personal loans [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	5,305	6,124
Stage Two [Member] | Consumer installment and other personal loans [member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	362	429
Stage Two [Member] | Consumer installment and other personal loans [member] | Gross carrying amount [member] | Exceptionally low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	28	31
Stage Two [Member] | Consumer installment and other personal loans [member] | Gross carrying amount [member] | Very low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	28	37
Stage Two [Member] | Consumer installment and other personal loans [member] | Gross carrying amount [member] | Low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	505	585
Stage Two [Member] | Consumer installment and other personal loans [member] | Gross carrying amount [member] | Medium probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	3,769	4,334
Stage Two [Member] | Consumer installment and other personal loans [member] | Gross carrying amount [member] | High probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	1,288	1,470
Stage Two [Member] | Consumer installment and other personal loans [member] | Gross carrying amount [member] | Not Rated [Member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	49	96
Stage Two [Member] | Credit Card Loans [Member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	926	1,167
Stage Two [Member] | Credit Card Loans [Member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	233	272
Stage Two [Member] | Credit Card Loans [Member] | Gross carrying amount [member] | Very low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	1	15
Stage Two [Member] | Credit Card Loans [Member] | Gross carrying amount [member] | Low probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	136	148
Stage Two [Member] | Credit Card Loans [Member] | Gross carrying amount [member] | Medium probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	725	899
Stage Two [Member] | Credit Card Loans [Member] | Gross carrying amount [member] | High probability of default [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	297	377
Stage Two [Member] | Business and government loans [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	23,782	40,925
Stage Two [Member] | Business and government loans [member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	832	1,044
Stage Two [Member] | Business and government loans [member] | Gross carrying amount [member] | Investment grade [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	1,515	3,242
Stage Two [Member] | Business and government loans [member] | Gross carrying amount [member] | Sub investment grade [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	16,173	30,106
Stage Two [Member] | Business and government loans [member] | Gross carrying amount [member] | Watch list [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	6,926	8,621
Stage Two [Member] | Loan commitments and financial guarantee contracts issued [member]
Disclosure of credit risk exposure [line items]
Commitments and financial guarantee contracts	13,951	26,622
Stage Two [Member] | Loan commitments and financial guarantee contracts issued [member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	191	288
Stage Two [Member] | Loan commitments and financial guarantee contracts issued [member] | Gross carrying amount [member] | Investment grade [member]
Disclosure of credit risk exposure [line items]
Commitments and financial guarantee contracts	1,024	1,628
Stage Two [Member] | Loan commitments and financial guarantee contracts issued [member] | Gross carrying amount [member] | Sub investment grade [member]
Disclosure of credit risk exposure [line items]
Commitments and financial guarantee contracts	10,139	20,421
Stage Two [Member] | Loan commitments and financial guarantee contracts issued [member] | Gross carrying amount [member] | Watch list [member]
Disclosure of credit risk exposure [line items]
Commitments and financial guarantee contracts	2,979	4,861
Stage three [member] | Residential mortgages [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	371	393
Stage three [member] | Residential mortgages [member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	13	16
Stage three [member] | Residential mortgages [member] | Gross carrying amount [member] | Default and impaired [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	384	409
Stage three [member] | Consumer installment and other personal loans [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	201	235
Stage three [member] | Consumer installment and other personal loans [member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	98	105
Stage three [member] | Consumer installment and other personal loans [member] | Gross carrying amount [member] | Default and impaired [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	299	340
Stage three [member] | Business and government loans [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	1,320	2,283
Stage three [member] | Business and government loans [member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	427	606
Stage three [member] | Business and government loans [member] | Gross carrying amount [member] | Default and impaired [member]
Disclosure of credit risk exposure [line items]
Credit risk exposure for loans	1,747	2,889
Stage three [member] | Loan commitments and financial guarantee contracts issued [member]
Disclosure of credit risk exposure [line items]
Commitments and financial guarantee contracts	768	1,249
Stage three [member] | Loan commitments and financial guarantee contracts issued [member] | Gross carrying amount [member]
Disclosure of credit risk exposure [line items]
Allowance for credit losses	24	12
Stage three [member] | Loan commitments and financial guarantee contracts issued [member] | Gross carrying amount [member] | Default and impaired [member]
Disclosure of credit risk exposure [line items]
Commitments and financial guarantee contracts	$ 792	$ 1,261

Loans and Allowance for Credi_5

Loans and Allowance for Credit Losses - Summary of Credit Risk Exposures for Loans Carried at Amortized Cost, FVOCI or FVTPL (Parenthetical) (Detail) - Credit Card Loans [Member] - Bottom of range [member] - 90 days or more [member]	9 Months Ended
	Jul. 31, 2021
Principal [Member]
Disclosure of credit risk exposure [line items]
Number of days for which the loan receivable is overdue for the loans to be written off	180 days
Interest [Member]
Disclosure of credit risk exposure [line items]
Number of days for which the loan receivable is overdue for the loans to be written off	180 days

Loans and Allowance for Credi_6

Loans and Allowance for Credit Losses - Summary of Continuity in Loss Allowance by Each Product Type (Detail) - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Disclosure of credit risk exposure [line items]
Beginning balance			$ 3,814
Ending balance	$ 3,248		3,248
IFRS9 [member]
Disclosure of credit risk exposure [line items]
Ending balance	3,248	$ 3,707	3,248	$ 3,707
IFRS9 [member] | Allowance for credit losses related to loans [member]
Disclosure of credit risk exposure [line items]
Ending balance	2,824	3,251	2,824	3,251
IFRS9 [member] | Allowance for credit losses related to other credit instruments [member]
Disclosure of credit risk exposure [line items]
Ending balance	424	456	424	456
Residential mortgages [member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Beginning balance	135	93	152	86
Net remeasurement of loss allowance	(32)	67	(34)	93
Loan originations	15	4	28	8
Derecognitions and maturities	(5)	(2)	(15)	(5)
Model changes		(4)		(8)
Total PCL	(22)	65	(21)	88
Write-offs	(3)	(3)	(9)	(9)
Recoveries of previous write-offs	4	2	8	6
Foreign exchange and other	(3)	(7)	(19)	(21)
Ending balance	111	150	111	150
Consumer installment and other personal loans [member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Beginning balance	643	648	707	558
Net remeasurement of loss allowance	14	109	49	297
Loan originations	23	9	66	32
Derecognitions and maturities	(21)	(13)	(58)	(39)
Model changes		19		49
Total PCL	16	124	57	339
Write-offs	(55)	(81)	(184)	(248)
Recoveries of previous write-offs	24	22	70	64
Foreign exchange and other	(2)	(16)	(24)	(16)
Ending balance	626	697	626	697
Credit Card Loans [Member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Beginning balance	390	434	431	305
Net remeasurement of loss allowance	47	81	117	343
Loan originations	11	5	28	13
Derecognitions and maturities	(10)	(8)	(28)	(22)
Model changes		(11)		(11)
Total PCL	48	67	117	323
Write-offs	(70)	(80)	(212)	(257)
Recoveries of previous write-offs	26	19	73	66
Foreign exchange and other	(7)	(11)	(22)	(8)
Ending balance	387	429	387	429
Business and government loans [member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Beginning balance	2,305	1,961	2,524	1,145
Net remeasurement of loss allowance	(87)	789	60	1,762
Loan originations	87	53	232	153
Derecognitions and maturities	(108)	(57)	(267)	(149)
Model changes		(11)	(24)	(22)
Total PCL	(108)	774	1	1,744
Write-offs	(101)	(300)	(285)	(516)
Recoveries of previous write-offs	13	37	40	60
Foreign exchange and other	15	(41)	(156)	(2)
Ending balance	2,124	2,431	2,124	2,431
Stage One [member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Ending balance	1,031	1,025	1,031	1,025
Stage One [member] | IFRS9 [member] | Allowance for credit losses related to loans [member]
Disclosure of credit risk exposure [line items]
Ending balance	822	813	822	813
Stage One [member] | IFRS9 [member] | Allowance for credit losses related to other credit instruments [member]
Disclosure of credit risk exposure [line items]
Ending balance	209	212	209	212
Stage One [member] | Residential mortgages [member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Beginning balance	60	29	51	15
Transfer to Stage 1	14	8	48	19
Transfer to Stage 2	(1)	(1)	(3)	(2)
Net remeasurement of loss allowance	(35)	27	(68)	29
Loan originations	15	4	28	8
Derecognitions and maturities	(2)		(5)	(1)
Model changes		(1)		(3)
Total PCL	(9)	37		50
Foreign exchange and other		(1)
Ending balance	51	65	51	65
Stage One [member] | Consumer installment and other personal loans [member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Beginning balance	141	116	148	89
Transfer to Stage 1	58	59	175	138
Transfer to Stage 2	(5)	(10)	(21)	(20)
Transfer to Stage 3	(3)	(1)	(6)	(3)
Net remeasurement of loss allowance	(64)	(50)	(197)	(112)
Loan originations	23	9	66	32
Derecognitions and maturities	(8)	(4)	(21)	(12)
Model changes		11		16
Total PCL	1	14	(4)	39
Foreign exchange and other		(3)	(2)	(1)
Ending balance	142	127	142	127
Stage One [member] | Credit Card Loans [Member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Beginning balance	106	115	110	80
Transfer to Stage 1	42	50	141	107
Transfer to Stage 2	(6)	(9)	(21)	(25)
Transfer to Stage 3			(1)	(1)
Net remeasurement of loss allowance	(39)	(44)	(139)	(57)
Loan originations	11	5	28	13
Derecognitions and maturities	(3)	(1)	(6)	(3)
Model changes		(1)		(1)
Total PCL	5		2	33
Foreign exchange and other	(1)	(3)	(2)	(1)
Ending balance	110	112	110	112
Stage One [member] | Business and government loans [member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Beginning balance	689	580	658	338
Transfer to Stage 1	114	45	385	109
Transfer to Stage 2	(23)	(65)	(86)	(118)
Transfer to Stage 3		(4)	(2)	(6)
Net remeasurement of loss allowance	(112)	145	(327)	321
Loan originations	87	53	232	153
Derecognitions and maturities	(36)	(21)	(102)	(63)
Model changes		(7)	(5)	(30)
Total PCL	30	146	95	366
Foreign exchange and other	9	(5)	(25)	17
Ending balance	728	721	728	721
Stage Two [Member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Ending balance	1,655	1,951	1,655	1,951
Stage Two [Member] | IFRS9 [member] | Allowance for credit losses related to loans [member]
Disclosure of credit risk exposure [line items]
Ending balance	1,464	1,719	1,464	1,719
Stage Two [Member] | IFRS9 [member] | Allowance for credit losses related to other credit instruments [member]
Disclosure of credit risk exposure [line items]
Ending balance	191	232	191	232
Stage Two [Member] | Residential mortgages [member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Beginning balance	53	37	75	33
Transfer to Stage 1	(13)	(7)	(39)	(17)
Transfer to Stage 2	3	4	20	7
Transfer to Stage 3	(2)	(1)	(11)	(4)
Net remeasurement of loss allowance		30	5	47
Derecognitions and maturities	(3)	(2)	(10)	(4)
Model changes		(3)		(5)
Total PCL	(15)	21	(35)	24
Foreign exchange and other			(2)	1
Ending balance	38	58	38	58
Stage Two [Member] | Consumer installment and other personal loans [member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Beginning balance	401	407	454	333
Transfer to Stage 1	(56)	(57)	(168)	(131)
Transfer to Stage 2	16	21	50	66
Transfer to Stage 3	(24)	(27)	(76)	(79)
Net remeasurement of loss allowance	60	103	169	247
Derecognitions and maturities	(13)	(9)	(37)	(27)
Model changes		8		33
Total PCL	(17)	39	(62)	109
Foreign exchange and other	2	(3)	(6)	1
Ending balance	386	443	386	443
Stage Two [Member] | Credit Card Loans [Member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Beginning balance	284	319	321	225
Transfer to Stage 1	(42)	(50)	(141)	(107)
Transfer to Stage 2	6	9	21	25
Transfer to Stage 3	(47)	(48)	(134)	(129)
Net remeasurement of loss allowance	84	105	234	332
Derecognitions and maturities	(7)	(7)	(22)	(19)
Model changes		(10)		(10)
Total PCL	(6)	(1)	(42)	92
Foreign exchange and other	(1)	(1)	(2)	0
Ending balance	277	317	277	317
Stage Two [Member] | Business and government loans [member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Beginning balance	1,075	795	1,258	496
Transfer to Stage 1	(113)	(45)	(380)	(102)
Transfer to Stage 2	63	66	138	121
Transfer to Stage 3	(17)	(163)	(83)	(226)
Net remeasurement of loss allowance	13	510	268	883
Derecognitions and maturities	(72)	(36)	(165)	(86)
Model changes		(4)	(19)	8
Total PCL	(126)	328	(241)	598
Foreign exchange and other	5	10	(63)	39
Ending balance	954	1,133	954	1,133
Stage three [member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Ending balance	562	731	562	731
Stage three [member] | IFRS9 [member] | Allowance for credit losses related to loans [member]
Disclosure of credit risk exposure [line items]
Ending balance	538	719	538	719
Stage three [member] | IFRS9 [member] | Allowance for credit losses related to other credit instruments [member]
Disclosure of credit risk exposure [line items]
Ending balance	24	12	24	12
Stage three [member] | Residential mortgages [member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Beginning balance	22	27	26	38
Transfer to Stage 1	(1)	(1)	(9)	(2)
Transfer to Stage 2	(2)	(3)	(17)	(5)
Transfer to Stage 3	2	1	11	4
Net remeasurement of loss allowance	3	10	29	17
Total PCL	2	7	14	14
Write-offs	(3)	(3)	(9)	(9)
Recoveries of previous write-offs	4	2	8	6
Foreign exchange and other	(3)	(6)	(17)	(22)
Ending balance	22	27	22	27
Stage three [member] | Consumer installment and other personal loans [member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Beginning balance	101	125	105	136
Transfer to Stage 1	(2)	(2)	(7)	(7)
Transfer to Stage 2	(11)	(11)	(29)	(46)
Transfer to Stage 3	27	28	82	82
Net remeasurement of loss allowance	18	56	77	162
Total PCL	32	71	123	191
Write-offs	(55)	(81)	(184)	(248)
Recoveries of previous write-offs	24	22	70	64
Foreign exchange and other	(4)	(10)	(16)	(16)
Ending balance	98	127	98	127
Stage three [member] | Credit Card Loans [Member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Transfer to Stage 3	47	48	135	130
Net remeasurement of loss allowance	2	20	22	68
Total PCL	49	68	157	198
Write-offs	(70)	(80)	(212)	(257)
Recoveries of previous write-offs	26	19	73	66
Foreign exchange and other	(5)	(7)	(18)	(7)
Stage three [member] | Business and government loans [member] | IFRS9 [member]
Disclosure of credit risk exposure [line items]
Beginning balance	541	586	608	311
Transfer to Stage 1	(1)		(5)	(7)
Transfer to Stage 2	(40)	(1)	(52)	(3)
Transfer to Stage 3	17	167	85	232
Net remeasurement of loss allowance	12	134	119	558
Total PCL	(12)	300	147	780
Write-offs	(101)	(300)	(285)	(516)
Recoveries of previous write-offs	13	37	40	60
Foreign exchange and other	1	(46)	(68)	(58)
Ending balance	$ 442	$ 577	$ 442	$ 577

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses - Summary of Continuity in Loss Allowance by Each Product Type (Parenthetical) (Detail) - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Other assets [member]
Disclosure of credit risk exposure [line items]
Provision for credit losses	$ (4)	$ 24	$ (8)	$ 27

Loans and Allowance for Credi_8

Loans and Allowance for Credit Losses - Schedule of Loans and Allowance for Credit Losses by Geographic Region (Detail) - CAD ($) $ in Millions	Jul. 31, 2021	Apr. 30, 2021	Oct. 31, 2020
Disclosure of detailed information about financial instruments [line items]
Loans, Gross amount	$ 458,440	$ 447,637	$ 450,723
Allowance for credit losses	2,824	3,028	3,303
Loans, Net amount	455,616	$ 444,609	447,420
Allowance for credit losses related to loans [member]
Disclosure of detailed information about financial instruments [line items]
Loans, Gross amount	458,440		450,723
Loans, Net amount	455,616		447,420
Allowance for credit losses related to loans [member] | Related to impaired loans [member]
Disclosure of detailed information about financial instruments [line items]
Allowance for credit losses	538		727
Allowance for credit losses related to loans [member] | Related to performing loans [member]
Disclosure of detailed information about financial instruments [line items]
Allowance for credit losses	2,286		2,576
Allowance for credit losses related to loans [member] | Canada [member]
Disclosure of detailed information about financial instruments [line items]
Loans, Gross amount	293,558		276,975
Loans, Net amount	291,937		275,349
Allowance for credit losses related to loans [member] | Canada [member] | Related to impaired loans [member]
Disclosure of detailed information about financial instruments [line items]
Allowance for credit losses	352		303
Allowance for credit losses related to loans [member] | Canada [member] | Related to performing loans [member]
Disclosure of detailed information about financial instruments [line items]
Allowance for credit losses	1,269		1,323
Allowance for credit losses related to loans [member] | United States [member]
Disclosure of detailed information about financial instruments [line items]
Loans, Gross amount	156,332		161,725
Loans, Net amount	155,150		160,090
Allowance for credit losses related to loans [member] | United States [member] | Related to impaired loans [member]
Disclosure of detailed information about financial instruments [line items]
Allowance for credit losses	186		410
Allowance for credit losses related to loans [member] | United States [member] | Related to performing loans [member]
Disclosure of detailed information about financial instruments [line items]
Allowance for credit losses	996		1,225
Allowance for credit losses related to loans [member] | Other countries [member]
Disclosure of detailed information about financial instruments [line items]
Loans, Gross amount	8,550		12,023
Loans, Net amount	8,529		11,981
Allowance for credit losses related to loans [member] | Other countries [member] | Related to impaired loans [member]
Disclosure of detailed information about financial instruments [line items]
Allowance for credit losses			14
Allowance for credit losses related to loans [member] | Other countries [member] | Related to performing loans [member]
Disclosure of detailed information about financial instruments [line items]
Allowance for credit losses	$ 21		$ 28

Loans and Allowance for Credi_9

Loans and Allowance for Credit Losses - Schedule of Loans and Allowance for Credit Losses by Geographic Region (Parenthetical) (Detail) - CAD ($) $ in Millions	Jul. 31, 2021	Apr. 30, 2021	Oct. 31, 2020
Disclosure of detailed information about financial instruments [line items]
Other liabilities	$ 36,950	$ 38,554	$ 36,193
Allowance for credit losses on impaired loans, other credit instruments [Member] | Related to impaired loans [member]
Disclosure of detailed information about financial instruments [line items]
Other liabilities	24		12
Allowance for credit losses on performing loans, other credit instruments [member] | Related to performing loans [member]
Disclosure of detailed information about financial instruments [line items]
Other liabilities	$ 400		$ 499

Loans and Allowance for Cred_10

Loans and Allowance for Credit Losses - Schedule of impaired loans, including the related allowances (Detail) - CAD ($) $ in Millions	Jul. 31, 2021	Oct. 31, 2020
Financial assets impaired [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	$ 1,892	$ 2,911
Financial assets impaired [member] | Canada [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	855	1,040
Financial assets impaired [member] | United States [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	1,037	1,801
Financial assets impaired [member] | Other countries [member]
Disclosure of detailed information about financial instruments [line items]
Total loans		70
Residential mortgages [member] | Financial assets impaired [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	371	393
Consumer installment and other personal [member] | Financial assets impaired [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	201	235
Business and government loans [member] | Financial assets impaired [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	1,320	2,283
Accumulated impairment [member] | Related to specific allowances [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	538	727
Accumulated impairment [member] | Related to specific allowances [member] | Canada [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	352	303
Accumulated impairment [member] | Related to specific allowances [member] | United States [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	186	410
Accumulated impairment [member] | Related to specific allowances [member] | Other countries [member]
Disclosure of detailed information about financial instruments [line items]
Total loans		14
Accumulated impairment [member] | Residential mortgages [member] | Related to specific allowances [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	13	16
Accumulated impairment [member] | Consumer installment and other personal [member] | Related to specific allowances [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	98	105
Accumulated impairment [member] | Business and government loans [member] | Related to specific allowances [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	427	606
Gross carrying amount [member] | Financial assets impaired [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	2,430	3,638
Gross carrying amount [member] | Financial assets impaired [member] | Canada [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	1,207	1,343
Gross carrying amount [member] | Financial assets impaired [member] | United States [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	1,223	2,211
Gross carrying amount [member] | Financial assets impaired [member] | Other countries [member]
Disclosure of detailed information about financial instruments [line items]
Total loans		84
Gross carrying amount [member] | Residential mortgages [member] | Financial assets impaired [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	384	409
Gross carrying amount [member] | Consumer installment and other personal [member] | Financial assets impaired [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	299	340
Gross carrying amount [member] | Business and government loans [member] | Financial assets impaired [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	$ 1,747	$ 2,889

Loans and Allowance for Cred_11

Loans and Allowance for Credit Losses - Schedule of impaired loans, including the related allowances (Parenthetical) (Detail) - CAD ($) $ in Millions	Jul. 31, 2021	Apr. 30, 2021	Oct. 31, 2020
Disclosure of detailed information about financial instruments [line items]
Other liabilities	$ 36,950	$ 38,554	$ 36,193
Accumulated impairment [member] | Allowance for credit losses related to other credit instruments [member] | Related to specific allowances [member]
Disclosure of detailed information about financial instruments [line items]
Other liabilities	$ 24		$ 12

Loans and Allowance for Cred_12

Loans and Allowance for Credit Losses - Summary of Loans that are Past Due but not Classified as Impaired (Detail) - Financial assets past due but not impaired [member] - CAD ($) $ in Millions	Jul. 31, 2021	Oct. 31, 2020
Disclosure of detailed information about financial instruments [line items]
Total loans	$ 989	$ 1,348
Residential mortgages [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	357	586
Credit card, consumer installment and other personal loans [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	381	410
Business and government loans [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	251	352
90 days or more [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	112	130
90 days or more [member] | Residential mortgages [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	16	43
90 days or more [member] | Credit card, consumer installment and other personal loans [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	64	65
90 days or more [member] | Business and government loans [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	32	22
30-89 days [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	877	1,218
30-89 days [member] | Residential mortgages [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	341	543
30-89 days [member] | Credit card, consumer installment and other personal loans [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	317	345
30-89 days [member] | Business and government loans [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	$ 219	$ 330

Loans and Allowance for Cred_13

Loans and Allowance for Credit Losses - Summary of Loans that are Past Due but not Classified as Impaired (Parenthetical) (Detail) - CAD ($) $ in Millions	Jul. 31, 2021	Oct. 31, 2020
90 days or more [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	$ 42	$ 53

Loans and Allowance for Cred_14

Loans and Allowance for Credit Losses - Summary of Key Economic Variables Used to Estimate Allowance on Performing Loans During Forecast Period (Detail)	3 Months Ended
	Jul. 31, 2021	Oct. 31, 2020
Benign scenario [member] | Canada [member] | First 12 months [member]
Disclosure of detailed information about financial instruments [line items]
Real GDP growth rates	9.60%	3.70%
Corporate BBB	1.50%	1.80%
Unemployment rates	5.90%	7.40%
Housing Price Index	24.00%	10.30%
Benign scenario [member] | Canada [member] | Second 12 months [member]
Disclosure of detailed information about financial instruments [line items]
Real GDP growth rates	5.50%	6.40%
Corporate BBB	1.90%	1.90%
Unemployment rates	4.80%	6.10%
Housing Price Index	10.90%	7.70%
Benign scenario [member] | United States [member] | First 12 months [member]
Disclosure of detailed information about financial instruments [line items]
Real GDP growth rates	10.90%	1.60%
Corporate BBB	1.00%	1.70%
Unemployment rates	4.30%	6.40%
Housing Price Index	13.80%	4.60%
Benign scenario [member] | United States [member] | Second 12 months [member]
Disclosure of detailed information about financial instruments [line items]
Real GDP growth rates	4.60%	6.00%
Corporate BBB	1.20%	1.70%
Unemployment rates	3.20%	4.80%
Housing Price Index	7.00%	4.50%
Base Scenario [member] | Canada [member] | First 12 months [member]
Disclosure of detailed information about financial instruments [line items]
Real GDP growth rates	7.30%	1.80%
Corporate BBB	1.90%	2.20%
Unemployment rates	7.10%	8.90%
Housing Price Index	20.90%	7.20%
Base Scenario [member] | Canada [member] | Second 12 months [member]
Disclosure of detailed information about financial instruments [line items]
Real GDP growth rates	3.90%	4.20%
Corporate BBB	2.20%	2.20%
Unemployment rates	5.80%	7.50%
Housing Price Index	6.00%	2.80%
Base Scenario [member] | United States [member] | First 12 months [member]
Disclosure of detailed information about financial instruments [line items]
Real GDP growth rates	8.70%	(0.40%)
Corporate BBB	1.30%	2.00%
Unemployment rates	4.90%	8.00%
Housing Price Index	11.50%	2.40%
Base Scenario [member] | United States [member] | Second 12 months [member]
Disclosure of detailed information about financial instruments [line items]
Real GDP growth rates	3.30%	4.00%
Corporate BBB	1.60%	2.00%
Unemployment rates	3.70%	6.00%
Housing Price Index	4.50%	2.10%
Adverse scenario [member] | Canada [member] | First 12 months [member]
Disclosure of detailed information about financial instruments [line items]
Real GDP growth rates	0.70%	(4.40%)
Corporate BBB	3.60%	3.60%
Unemployment rates	11.20%	12.70%
Housing Price Index	(8.60%)	(1.20%)
Adverse scenario [member] | Canada [member] | Second 12 months [member]
Disclosure of detailed information about financial instruments [line items]
Real GDP growth rates	(1.10%)	(1.10%)
Corporate BBB	4.40%	4.50%
Unemployment rates	13.10%	13.90%
Housing Price Index	(18.00%)	(8.70%)
Adverse scenario [member] | United States [member] | First 12 months [member]
Disclosure of detailed information about financial instruments [line items]
Real GDP growth rates	0.10%	(5.10%)
Corporate BBB	4.20%	3.90%
Unemployment rates	9.10%	11.50%
Housing Price Index	(7.40%)	(2.40%)
Adverse scenario [member] | United States [member] | Second 12 months [member]
Disclosure of detailed information about financial instruments [line items]
Real GDP growth rates	(1.10%)	(1.20%)
Corporate BBB	4.50%	4.10%
Unemployment rates	11.60%	12.80%
Housing Price Index	(15.50%)	(6.20%)

Deposits and Subordinated Deb_2

Deposits and Subordinated Debt - Summary of Deposits (Detail) - CAD ($) $ in Millions	Jul. 31, 2021	Apr. 30, 2021	Oct. 31, 2020
Disclosure Of Deposits [Line Items]
Interest bearing	$ 61,574		$ 52,366
Non-interest bearing	88,584		77,087
Payables after notice	262,551		237,949
Payable on a fixed date	267,844		291,632
Total	680,553	$ 657,201	659,034
Canada [member]
Disclosure Of Deposits [Line Items]
Interest bearing	52,667		41,855
Non-interest bearing	79,560		67,873
Payables after notice	126,999		112,543
Payable on a fixed date	163,465		185,655
Total	422,691		407,926
United States [member]
Disclosure Of Deposits [Line Items]
Interest bearing	8,594		8,818
Non-interest bearing	8,959		9,170
Payables after notice	134,231		124,129
Payable on a fixed date	75,851		78,175
Total	227,635		220,292
Other countries [member]
Disclosure Of Deposits [Line Items]
Interest bearing	313		1,693
Non-interest bearing	65		44
Payables after notice	1,321		1,277
Payable on a fixed date	28,528		27,802
Total	30,227		30,816
Banks [Member]
Disclosure Of Deposits [Line Items]
Interest bearing	5,830		3,594
Non-interest bearing	1,998		2,460
Payables after notice	769		1,231
Payable on a fixed date	20,630		31,540
Total	29,227		38,825
Business and governments [member]
Disclosure Of Deposits [Line Items]
Interest bearing	50,810		44,111
Non-interest bearing	50,659		44,258
Payables after notice	144,468		124,813
Payable on a fixed date	188,817		187,497
Total	434,754		400,679
Individuals [Member]
Disclosure Of Deposits [Line Items]
Interest bearing	4,934		4,661
Non-interest bearing	35,927		30,369
Payables after notice	117,314		111,905
Payable on a fixed date	58,397		72,595
Total	$ 216,572		$ 219,530

Deposits and Subordinated Deb_3

Deposits and Subordinated Debt - Summary of Deposits (Parenthetical) (Detail) - CAD ($) $ in Millions	Jul. 31, 2021	Oct. 31, 2020
Disclosure Of Deposits [Line Items]
Deposits booked payable on a fixed date	$ 267,844	$ 291,632
Deposits eligible for early redemption without penalty	21,108	27,353
Bank Recapitalization (Bail-In) Regime [member]
Disclosure Of Deposits [Line Items]
Deposits booked payable on a fixed date	31,727	25,651
U.S. dollars [member]
Disclosure Of Deposits [Line Items]
Deposits liabilities	340,368	322,951
Non USD Non CAD [Member]
Disclosure Of Deposits [Line Items]
Deposits liabilities	$ 28,815	$ 32,254

Deposits and Subordinated Deb_4

Deposits and Subordinated Debt - Subordinated Debt - Additional Information (Detail) - CAD ($) $ in Millions	Jul. 22, 2021	Jun. 01, 2021	Dec. 08, 2020	Jul. 31, 2021	Jul. 31, 2021
Disclosure Of Deposits [Line Items]
Repayments of subordinated liabilities				$ 1,250	$ 2,250
Series H Medium Term Notes Second Tranche [member]
Disclosure Of Deposits [Line Items]
Repayments of subordinated liabilities			$ 1,000
Percentage of redemption of principal amount plus unpaid accrued interest			100.00%
Series I Medium Term Notes First Tranche [member]
Disclosure Of Deposits [Line Items]
Interest rate		3.32%
Repayments of subordinated liabilities		$ 1,250
Percentage of redemption of principal amount plus unpaid accrued interest		100.00%
Series K Medium Term Notes [member]
Disclosure Of Deposits [Line Items]
Maturity date	July 22, 2031
Floating rate reset date	Jul. 22, 2026
Subordinated debt [member] | 1.928% Subordinated Notes Due 2031 [member]
Disclosure Of Deposits [Line Items]
Face value	$ 1,000
Interest rate	1.928%

Deposits and Subordinated Deb_5

Deposits and Subordinated Debt - Summary of Deposits payable on a fixed (Detail) - CAD ($) $ in Millions	Jul. 31, 2021	Oct. 31, 2020
Disclosure of deposits payable to customers on a fixed date [line items]
Deposits booked payable on a fixed date	$ 267,844	$ 291,632
Deposits More Than One Hundred Thousand Dollar [Member]
Disclosure of deposits payable to customers on a fixed date [line items]
Deposits booked payable on a fixed date	240,274	258,460
Canada
Disclosure of deposits payable to customers on a fixed date [line items]
Deposits booked payable on a fixed date	163,465	185,655
Canada | Deposits More Than One Hundred Thousand Dollar [Member]
Disclosure of deposits payable to customers on a fixed date [line items]
Deposits booked payable on a fixed date	140,159	158,475
United States
Disclosure of deposits payable to customers on a fixed date [line items]
Deposits booked payable on a fixed date	75,851	78,175
United States | Deposits More Than One Hundred Thousand Dollar [Member]
Disclosure of deposits payable to customers on a fixed date [line items]
Deposits booked payable on a fixed date	71,589	72,186
Other Countries [member]
Disclosure of deposits payable to customers on a fixed date [line items]
Deposits booked payable on a fixed date	28,528	27,802
Other Countries [member] | Deposits More Than One Hundred Thousand Dollar [Member]
Disclosure of deposits payable to customers on a fixed date [line items]
Deposits booked payable on a fixed date	$ 28,526	$ 27,799

Deposits and Subordinated Deb_6

Deposits and Subordinated Debt - Summary of maturity schedule for deposits greater than one hundred thousand dollars booked in Canada (Detail) - CAD ($) $ in Millions	Jul. 31, 2021	Apr. 30, 2021	Oct. 31, 2020
Disclosure of deposits payable to customers on a fixed date [line items]
Deposits	$ 680,553	$ 657,201	$ 659,034
CANADA
Disclosure of deposits payable to customers on a fixed date [line items]
Deposits	422,691		407,926
CANADA | Deposits more than one hundred thousand dollar [Member]
Disclosure of deposits payable to customers on a fixed date [line items]
Deposits	140,159		158,475
CANADA | Less than 3 months [member] | Deposits more than one hundred thousand dollar [Member]
Disclosure of deposits payable to customers on a fixed date [line items]
Deposits	22,423		18,081
CANADA | 3 to 6 months [member] | Deposits more than one hundred thousand dollar [Member]
Disclosure of deposits payable to customers on a fixed date [line items]
Deposits	13,274		29,679
CANADA | 6 to 12 months [member] | Deposits more than one hundred thousand dollar [Member]
Disclosure of deposits payable to customers on a fixed date [line items]
Deposits	23,840		28,109
CANADA | Over 12 months [member] | Deposits more than one hundred thousand dollar [Member]
Disclosure of deposits payable to customers on a fixed date [line items]
Deposits	$ 80,622		$ 82,606

Equity - Summary of Classes of

Equity - Summary of Classes of Preferred and Common Shares Outstanding (Detail) - CAD ($) $ in Millions	9 Months Ended
	Jul. 31, 2021	Apr. 30, 2021	Oct. 31, 2020	Jul. 31, 2020	Apr. 30, 2020	Oct. 31, 2019
Disclosure of classes of share capital [line items]
Balance at End of Period	$ 57,696	$ 55,514	$ 56,593	$ 54,587
Class B Series 25 [member]
Disclosure of classes of share capital [line items]
Balance at End of Period	9,425,607		9,425,607
Balance at End of Period	$ 236		$ 236
Convertible into	Class B - Series 26
Class B Series 26 [member]
Disclosure of classes of share capital [line items]
Balance at End of Period	2,174,393		2,174,393
Balance at End of Period	$ 54		$ 54
Convertible into	Class B - Series 25
Class B Series 27 [member]
Disclosure of classes of share capital [line items]
Balance at End of Period	20,000,000		20,000,000
Balance at End of Period	$ 500		$ 500
Convertible into	Class B - Series 28
Class B Series 29 [member]
Disclosure of classes of share capital [line items]
Balance at End of Period	16,000,000		16,000,000
Balance at End of Period	$ 400		$ 400
Convertible into	Class B - Series 30
Class B Series 31 [member]
Disclosure of classes of share capital [line items]
Balance at End of Period	12,000,000		12,000,000
Balance at End of Period	$ 300		$ 300
Convertible into	Class B - Series 32
Class B Series 33 [member]
Disclosure of classes of share capital [line items]
Balance at End of Period	8,000,000		8,000,000
Balance at End of Period	$ 200		$ 200
Convertible into	Class B - Series 34
Class B Series 35 [member]
Disclosure of classes of share capital [line items]
Balance at End of Period			6,000,000
Balance at End of Period			$ 150
Convertible into	Not convertible
Class B Series 36 [member]
Disclosure of classes of share capital [line items]
Balance at End of Period			600,000
Balance at End of Period			$ 600
Convertible into	Class B - Series 37
Class B Series 38 [member]
Disclosure of classes of share capital [line items]
Balance at End of Period	24,000,000		24,000,000
Balance at End of Period	$ 600		$ 600
Convertible into	Class B - Series 39
Class B Series 40 [member]
Disclosure of classes of share capital [line items]
Balance at End of Period	20,000,000		20,000,000
Balance at End of Period	$ 500		$ 500
Convertible into	Class B - Series 41
Class B Series 42 [member]
Disclosure of classes of share capital [line items]
Balance at End of Period	16,000,000		16,000,000
Balance at End of Period	$ 400		$ 400
Convertible into	Class B - Series 43
Class B Series 44 [member]
Disclosure of classes of share capital [line items]
Balance at End of Period	16,000,000		16,000,000
Balance at End of Period	$ 400		$ 400
Convertible into	Class B - Series 45
Class B Series 46 [member]
Disclosure of classes of share capital [line items]
Balance at End of Period	14,000,000		14,000,000
Balance at End of Period	$ 350		$ 350
Convertible into	Class B - Series 47
Preferred shares [member]
Disclosure of classes of share capital [line items]
Balance at End of Period	$ 3,940		4,690
Other Equity Instrument [Member]
Disclosure of classes of share capital [line items]
Balance at End of Period	$ 1,908		$ 1,908
Common shares [member]
Disclosure of classes of share capital [line items]
Balance at End of Period	648,094,938		645,889,396
Balance at End of Period	$ 13,609	13,536	$ 13,430	13,200	$ 13,000	$ 12,971
Preferred Shares and Other Equity Instruments [Member]
Disclosure of classes of share capital [line items]
Balance at End of Period	5,848	$ 5,848	6,598	$ 5,348	$ 5,348	$ 5,348
4.8% Additional Tier 1 Capital Notes (NVCC) [member]
Disclosure of classes of share capital [line items]
Balance at End of Period	$ 658		658
Convertible into	Common shares
4.3% Limited Recourse Capital Notes Series 1 [Member]
Disclosure of classes of share capital [line items]
Balance at End of Period	$ 1,250		$ 1,250
Convertible into	Common shares

Equity - Summary of Classes o_2

Equity - Summary of Classes of Preferred and Common Shares Outstanding (Parenthetical) (Detail) - $ / shares	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Oct. 31, 2020	Jul. 31, 2021
Disclosure of classes of share capital [line items]
Common stock conversion price	$ 5		$ 5
Number of shares issued	1,330,160		1,330,160
Common shares [member]
Disclosure of classes of share capital [line items]
Number of shares	648,094,938	645,889,396	648,094,938
Number of shares issued	503,580		503,580
Stock options issued, convertible shares	0		0
Common shares [member] | Stock Option Plan [member]
Disclosure of classes of share capital [line items]
Stock options issued, convertible shares		(6,446,110)	6,077,912
Treasury shares [member]
Disclosure of classes of share capital [line items]
Number of shares	222,652	(652,730)	222,652

Equity - Additional Information

Equity - Additional Information (Detail) $ in Millions, $ in Millions	Jul. 16, 2021CAD ($)shares	Nov. 25, 2020CAD ($)shares	Jul. 31, 2021USD ($)	Jul. 31, 2021CAD ($)
4.8% Additional Tier 1 Capital Notes (NVCC) [member]
Disclosure of classes of share capital [line items]
Note Issued Face Value			$ 500	$ 658
Interest Rate			4.80%
4.3% Limited Recourse Capital Notes [Member]
Disclosure of classes of share capital [line items]
Note Issued Face Value				$ 1,250
Interest Rate			4.30%
Class B series thiry five preferred shares [Member]
Disclosure of classes of share capital [line items]
Number of shares redeemed | shares		6,000,000
Redemption aggregate value		$ 156
Class B series thiry six preferred shares [Member]
Disclosure of classes of share capital [line items]
Dividend rate reset term		5 years
Number of shares redeemed | shares		600,000
Redemption aggregate value		$ 600
Class B series twenty five preferred shares [Member]
Disclosure of classes of share capital [line items]
Dividend rate reset term	5 years
Redemption aggregate value	$ 236
Number of shares intend to redeem | shares	9,425,607
Class B series twenty six preferred shares [Member]
Disclosure of classes of share capital [line items]
Redemption aggregate value	$ 54
Number of shares intend to redeem | shares	2,174,393

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Summary of Financial Instruments Designated At Fair Value Through Profit Or Loss (Detail) - CAD ($) $ in Millions	Jul. 31, 2021	Apr. 30, 2021	Oct. 31, 2020
Securities
Amortized cost	$ 48,727	$ 46,744	$ 48,466
Loans
Consumer instalment and other personal	75,092	71,918	70,148
Credit cards	7,866	7,488	7,889
Business and government	241,108	237,702	245,662
Loans gross of allowance for loan losses	458,440	447,637	450,723
Deposits	680,553	657,201	659,034
Securitization and structured entities' liabilities	23,927	25,657	26,889
Subordinated Debt	6,973	$ 7,144	8,416
Not Carried At Fair Value [member] | At carrying value [member]
Securities
Amortized cost	48,727		48,466
Loans
Residential mortgages	134,273		126,882
Consumer instalment and other personal	74,505		69,480
Credit cards	7,573		7,556
Business and government	232,459		238,239
Loans gross of allowance for loan losses	448,810		442,157
Deposits	658,175		640,961
Securitization and structured entities' liabilities	23,298		26,889
Subordinated Debt	6,973		8,416
Not Carried At Fair Value [member] | Fair Value [Member]
Securities
Amortized cost	49,105		49,009
Loans
Residential mortgages	134,914		128,815
Consumer instalment and other personal	74,945		70,192
Credit cards	7,573		7,556
Business and government	233,753		239,929
Loans gross of allowance for loan losses	451,185		446,492
Deposits	659,636		643,156
Securitization and structured entities' liabilities	23,709		27,506
Subordinated Debt	$ 7,275		$ 8,727

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Summary of Financial Instruments Designated At Fair Value Through Profit Or Loss (Parenthetical) (Detail) - CAD ($) $ in Millions	Jul. 31, 2021	Apr. 30, 2021	Oct. 31, 2020
Fair value of financial instruments on balance sheet [line items]
Business and government	$ 241,108	$ 237,702	$ 245,662
Deposits	680,553	657,201	659,034
Securitization and structured entities' liabilities	23,927	$ 25,657	26,889
Financial assets at fair value through profit or loss [member]
Fair value of financial instruments on balance sheet [line items]
Business and government	6,738		5,306
Financial assets at fair value through profit or loss [member] | Not Carried At Fair Value [member]
Fair value of financial instruments on balance sheet [line items]
Deposits	22,085		18,073
Metal deposits	293		0
Securitization and structured entities' liabilities	629		0
Financial assets at fair value through other comprehensive income [member]
Fair value of financial instruments on balance sheet [line items]
Business and government	$ 140		$ 51

Fair Value of Financial Instr_5

Fair Value of Financial Instruments - Summary of Fair Value Measurement of Assets And Liabilities (Detail) - CAD ($) $ in Millions	Jul. 31, 2021	Apr. 30, 2021	Oct. 31, 2020
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	$ 102,169	$ 90,566	$ 97,834
FVTPL Securities	14,239	13,331	13,568
FVOCI Securities	64,553	61,172	73,407
Business and Government Loans	241,108	237,702	245,662
Other Assets	22,648	22,107	23,059
Derivative Assets
Derivative Assets	36,331	37,998	36,815
Derivative Liabilities
Derivative Liabilities	29,167	$ 33,218	30,375
Measured at fair value [Member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	102,169		97,834
FVTPL Securities	14,239		13,568
FVOCI Securities	64,553		73,407
Business and Government Loans	6,878		5,357
Other Assets	3,359		5,445
Fair value liabilities	52,682		48,734
Securities sold but not yet purchased	28,497		29,376
Structured note liabilities	22,085		18,073
Other liabilities	2,100		1,285
Derivative Assets
Derivative Assets	36,331		36,815
Derivative Liabilities
Derivative Liabilities	29,167		30,375
Measured at fair value [Member] | Canadian federal government [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	6,295		10,900
FVTPL Securities	1,002		601
FVOCI Securities	14,610		22,450
Measured at fair value [Member] | Canadian government provincial [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	6,231		8,335
FVTPL Securities	1,354		1,429
FVOCI Securities	2,674		4,747
Measured at fair value [Member] | U.S. federal government [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	8,162		8,418
FVTPL Securities	49		44
FVOCI Securities	20,695		17,694
Measured at fair value [Member] | U.S. states, municipalities and agencies [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	294		503
FVOCI Securities	4,412		5,276
Measured at fair value [Member] | Other governments [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	1,556		2,516
FVTPL Securities	93		94
FVOCI Securities	6,597		7,381
Measured at fair value [Member] | NHA MBS U.S. agency MBS and CMO [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	14,076		12,297
FVTPL Securities	11		3
FVOCI Securities	12,853		12,532
Measured at fair value [Member] | Corporate debt [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	9,460		11,041
FVTPL Securities	7,752		7,897
FVOCI Securities	2,599		3,234
Measured at fair value [Member] | Loans held for trading [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	194		67
Measured at fair value [Member] | Corporate equity [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	55,901		43,757
FVTPL Securities	3,978		3,500
FVOCI Securities	113		93
Measured at fair value [Member] | Interest rate contracts [member]
Derivative Assets
Derivative Assets	10,225		14,929
Derivative Liabilities
Derivative Liabilities	7,767		10,893
Measured at fair value [Member] | Foreign exchange contracts [member]
Derivative Assets
Derivative Assets	15,670		10,826
Derivative Liabilities
Derivative Liabilities	12,009		10,612
Measured at fair value [Member] | Commodity contracts [member]
Derivative Assets
Derivative Assets	5,934		2,588
Derivative Liabilities
Derivative Liabilities	1,680		2,333
Measured at fair value [Member] | Equity contracts [member]
Derivative Assets
Derivative Assets	4,499		8,461
Derivative Liabilities
Derivative Liabilities	7,705		6,523
Measured at fair value [Member] | Credit default swaps [member]
Derivative Assets
Derivative Assets	3		11
Derivative Liabilities
Derivative Liabilities	6		14
Valued using quoted market prices [member] | Measured at fair value [Member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	73,774		62,667
FVTPL Securities	3,082		2,289
FVOCI Securities	36,321		42,664
Other Assets	3,274		5,328
Fair value liabilities	21,383		19,740
Securities sold but not yet purchased	21,383		19,740
Derivative Assets
Derivative Assets	1,332		887
Derivative Liabilities
Derivative Liabilities	1,220		831
Valued using quoted market prices [member] | Measured at fair value [Member] | Canadian federal government [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	5,031		6,529
FVTPL Securities	781		452
FVOCI Securities	13,627		20,765
Valued using quoted market prices [member] | Measured at fair value [Member] | Canadian government provincial [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	3,368		1,868
FVTPL Securities	469		180
FVOCI Securities	1,655		2,604
Valued using quoted market prices [member] | Measured at fair value [Member] | U.S. federal government [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	5,581		5,702
FVTPL Securities	1
FVOCI Securities	17,166		14,852
Valued using quoted market prices [member] | Measured at fair value [Member] | U.S. states, municipalities and agencies [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	30		16
FVOCI Securities	93		8
Valued using quoted market prices [member] | Measured at fair value [Member] | Other governments [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	1,152		1,021
FVOCI Securities	3,126		3,643
Valued using quoted market prices [member] | Measured at fair value [Member] | NHA MBS U.S. agency MBS and CMO [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities			7
Valued using quoted market prices [member] | Measured at fair value [Member] | Corporate debt [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	2,711		3,767
FVTPL Securities	141		70
FVOCI Securities	654		792
Valued using quoted market prices [member] | Measured at fair value [Member] | Corporate equity [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	55,901		43,757
FVTPL Securities	1,690		1,587
Valued using quoted market prices [member] | Measured at fair value [Member] | Interest rate contracts [member]
Derivative Assets
Derivative Assets	12		13
Derivative Liabilities
Derivative Liabilities	6		22
Valued using quoted market prices [member] | Measured at fair value [Member] | Foreign exchange contracts [member]
Derivative Assets
Derivative Assets	3		1
Derivative Liabilities
Derivative Liabilities	11		3
Valued using quoted market prices [member] | Measured at fair value [Member] | Commodity contracts [member]
Derivative Assets
Derivative Assets	352		123
Derivative Liabilities
Derivative Liabilities	638		350
Valued using quoted market prices [member] | Measured at fair value [Member] | Equity contracts [member]
Derivative Assets
Derivative Assets	965		750
Derivative Liabilities
Derivative Liabilities	565		456
Valued using models (with observable inputs) [member] | Measured at fair value [Member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	27,599		34,364
FVTPL Securities	8,881		9,376
FVOCI Securities	28,118		30,649
Business and Government Loans	4,573		3,412
Other Assets	85		117
Fair value liabilities	31,286		28,994
Securities sold but not yet purchased	7,114		9,636
Structured note liabilities	22,085		18,073
Other liabilities	2,087		1,285
Derivative Assets
Derivative Assets	34,999		35,928
Derivative Liabilities
Derivative Liabilities	27,943		29,540
Valued using models (with observable inputs) [member] | Measured at fair value [Member] | Canadian federal government [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	1,264		4,371
FVTPL Securities	221		149
FVOCI Securities	983		1,685
Valued using models (with observable inputs) [member] | Measured at fair value [Member] | Canadian government provincial [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	2,863		6,467
FVTPL Securities	885		1,249
FVOCI Securities	1,019		2,143
Valued using models (with observable inputs) [member] | Measured at fair value [Member] | U.S. federal government [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	2,581		2,716
FVTPL Securities	48		44
FVOCI Securities	3,529		2,842
Valued using models (with observable inputs) [member] | Measured at fair value [Member] | U.S. states, municipalities and agencies [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	264		487
FVOCI Securities	4,318		5,267
Valued using models (with observable inputs) [member] | Measured at fair value [Member] | Other governments [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	404		1,495
FVTPL Securities	93		94
FVOCI Securities	3,471		3,738
Valued using models (with observable inputs) [member] | Measured at fair value [Member] | NHA MBS U.S. agency MBS and CMO [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	13,282		11,487
FVTPL Securities	11		3
FVOCI Securities	12,853		12,532
Valued using models (with observable inputs) [member] | Measured at fair value [Member] | Corporate debt [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	6,747		7,274
FVTPL Securities	7,611		7,827
FVOCI Securities	1,945		2,442
Valued using models (with observable inputs) [member] | Measured at fair value [Member] | Loans held for trading [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	194		67
Valued using models (with observable inputs) [member] | Measured at fair value [Member] | Corporate equity [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
FVTPL Securities	12		10
Valued using models (with observable inputs) [member] | Measured at fair value [Member] | Interest rate contracts [member]
Derivative Assets
Derivative Assets	10,213		14,916
Derivative Liabilities
Derivative Liabilities	7,761		10,871
Valued using models (with observable inputs) [member] | Measured at fair value [Member] | Foreign exchange contracts [member]
Derivative Assets
Derivative Assets	15,667		10,825
Derivative Liabilities
Derivative Liabilities	11,998		10,609
Valued using models (with observable inputs) [member] | Measured at fair value [Member] | Commodity contracts [member]
Derivative Assets
Derivative Assets	5,582		2,465
Derivative Liabilities
Derivative Liabilities	1,042		1,983
Valued using models (with observable inputs) [member] | Measured at fair value [Member] | Equity contracts [member]
Derivative Assets
Derivative Assets	3,534		7,711
Derivative Liabilities
Derivative Liabilities	7,140		6,067
Valued using models (with observable inputs) [member] | Measured at fair value [Member] | Credit default swaps [member]
Derivative Assets
Derivative Assets	3		11
Derivative Liabilities
Derivative Liabilities	2		10
Valued using models (without observable inputs) [member] | Measured at fair value [Member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	796		803
FVTPL Securities	2,276		1,903
FVOCI Securities	114		94
Business and Government Loans	2,305		1,945
Fair value liabilities	13
Other liabilities	13
Derivative Liabilities
Derivative Liabilities	4		4
Valued using models (without observable inputs) [member] | Measured at fair value [Member] | U.S. states, municipalities and agencies [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
FVOCI Securities	1		1
Valued using models (without observable inputs) [member] | Measured at fair value [Member] | NHA MBS U.S. agency MBS and CMO [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	794		803
Valued using models (without observable inputs) [member] | Measured at fair value [Member] | Corporate debt [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Trading Securities	2
Valued using models (without observable inputs) [member] | Measured at fair value [Member] | Corporate equity [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
FVTPL Securities	2,276		1,903
FVOCI Securities	113		93
Valued using models (without observable inputs) [member] | Measured at fair value [Member] | Credit default swaps [member]
Derivative Liabilities
Derivative Liabilities	$ 4		$ 4

Fair Value of Financial Instr_6

Fair Value of Financial Instruments - Summary of Fair Value Measurement of Investment (Detail) $ in Millions	9 Months Ended
	Jul. 31, 2021CAD ($)bps
Corporate equity [member] | Valued using models (without observable inputs) [member]
Disclosure Of Fair Value Of Financial Instruments [Line Items]
Fair value of assets	$ 2,276
Corporate equity [member] | Bottom of range [member] | Valued using models (without observable inputs) [member]
Disclosure Of Fair Value Of Financial Instruments [Line Items]
EV/EBITDA multiple range of input values	6
Corporate equity [member] | Top of range [member] | Valued using models (without observable inputs) [member]
Disclosure Of Fair Value Of Financial Instruments [Line Items]
EV/EBITDA multiple range of input values	16
Loan [Member] | Valued using models (without observable inputs) [member]
Disclosure Of Fair Value Of Financial Instruments [Line Items]
Fair value of assets	$ 2,305
Loan [Member] | Bottom of range [member] | Valued using models (without observable inputs) [member]
Disclosure Of Fair Value Of Financial Instruments [Line Items]
Discount range of input values | bps	50
Loan [Member] | Top of range [member] | Valued using models (without observable inputs) [member]
Disclosure Of Fair Value Of Financial Instruments [Line Items]
Discount range of input values | bps	144
NHA MBS US Agency MBS And CMO [member] | Valued using models (without observable inputs) [member]
Disclosure Of Fair Value Of Financial Instruments [Line Items]
Fair value of assets	$ 794
NHA MBS US Agency MBS And CMO [member] | Bottom of range [member]
Disclosure Of Fair Value Of Financial Instruments [Line Items]
Comparability adjustment	(4.64)
NHA MBS US Agency MBS And CMO [member] | Bottom of range [member] | Valued using models (without observable inputs) [member]
Disclosure Of Fair Value Of Financial Instruments [Line Items]
Discounted cash flows and Prepayment rate changes in percentage	4.00%
NHA MBS US Agency MBS And CMO [member] | Top of range [member]
Disclosure Of Fair Value Of Financial Instruments [Line Items]
Comparability adjustment	4.53
NHA MBS US Agency MBS And CMO [member] | Top of range [member] | Valued using models (without observable inputs) [member]
Disclosure Of Fair Value Of Financial Instruments [Line Items]
Discounted cash flows and Prepayment rate changes in percentage	38.00%

Fair Value of Financial Instr_7

Fair Value of Financial Instruments - Summary of Fair Value Measurement of Investment (Parenthetical) (Detail) - CAD ($) $ in Millions	9 Months Ended	12 Months Ended
	Jul. 31, 2021	Oct. 31, 2020
Disclosure Of Fair Value Of Financial Instruments [Line Items]
Basis point increase or decrease in discount margin for business and government loans	10.00%	10.00%
Increase or decrease in business and government loans	$ 4	$ 3
Federal reserve stock and federal home loan bank stock [member] | Corporate equity [member]
Disclosure Of Fair Value Of Financial Instruments [Line Items]
Federal reserve stock and federal home loan bank stock	$ 457	$ 487

Fair Value of Financial Instr_8

Fair Value of Financial Instruments and Trading-Related Revenue - Summary of Transfers Between Level 1 and Level 2 (Detail) - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Trading securities [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Transfers out of Level 1 into Level 2 of fair value hierarchy	$ 639	$ 994	$ 4,067	$ 5,761
Transfers out of Level 2 into Level 1 of fair value hierarchy	1,473	2,682	11,009	3,952
Financial assets at fair value through profit or loss [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Transfers out of Level 1 into Level 2 of fair value hierarchy	153	19	361	518
Transfers out of Level 2 into Level 1 of fair value hierarchy	403	241	804	302
Financial assets at fair value through other comprehensive income [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Transfers out of Level 1 into Level 2 of fair value hierarchy	1,016	1,768	6,856	9,032
Transfers out of Level 2 into Level 1 of fair value hierarchy	1,917	4,294	10,890	7,012
Securities sold but not yet purchased [member]
Disclosure Of Fair Value Of Financial Instruments [line items]
Transfers out of Level 1 into Level 2 of fair value hierarchy	197	681	1,198	4,432
Transfers out of Level 2 into Level 1 of fair value hierarchy	$ 648	$ 2,067	$ 5,905	$ 2,982

Fair Value of Financial Instr_9

Fair Value of Financial Instruments - Summary of Changes in Level 3 Instruments Carried At Fair Value (Detail) - Valued using models (without observable inputs) [member] - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
NHA MBS US Agency MBS And CMO [member]
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]
Assets at end of period	$ 794		$ 794
Corporate equity [member]
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]
Assets at end of period	2,276		2,276
Trading securities [member]
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]
Assets at beginning of period	705	$ 535	803	$ 545
Change in fair value included in earnings	(78)	(105)	(172)	(235)
Change in fair value included in other comprehensive income	11	(20)	(50)	10
Purchases/Issuances	441	362	1,209	861
Sales	(256)	(207)	(939)	(608)
Transfers into Level 3	35	41	106	205
Transfers out of Level 3	(62)	(22)	(161)	(194)
Assets at end of period	796	584	796	584
Change in unrealized gains (losses) recorded in income for instruments still held	5	(74)	24	(159)
Trading securities [member] | NHA MBS US Agency MBS And CMO [member]
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]
Assets at beginning of period	702	487	803	538
Change in fair value included in earnings	(78)	(115)	(172)	(245)
Change in fair value included in other comprehensive income	11	(18)	(50)	12
Purchases/Issuances	441	362	1,206	811
Sales	(255)	(151)	(938)	(540)
Transfers into Level 3	35	41	106	202
Transfers out of Level 3	(62)	(22)	(161)	(194)
Assets at end of period	794	584	794	584
Change in unrealized gains (losses) recorded in income for instruments still held	5	(74)	24	(158)
Trading securities [member] | Corporate debt [member]
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]
Assets at beginning of period	3	48		7
Change in fair value included in earnings		10		10
Change in fair value included in other comprehensive income		(2)		(2)
Purchases/Issuances			3	50
Sales	(1)	(56)	(1)	(68)
Transfers into Level 3				3
Assets at end of period	2		2
Change in unrealized gains (losses) recorded in income for instruments still held				(1)
Financial assets at fair value through profit or loss [member]
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]
Assets at beginning of period	2,048	2,062	1,903	1,984
Change in fair value included in earnings	158	(23)	217	(27)
Change in fair value included in other comprehensive income	20	(57)	(81)	23
Purchases/Issuances	175	58	453	244
Sales	(106)	(233)	(193)	(418)
Maturities/Settlement			(4)
Transfers into Level 3				1
Transfers out of Level 3	(19)		(19)
Assets at end of period	2,276	1,807	2,276	1,807
Change in unrealized gains (losses) recorded in income for instruments still held	149	2	262	7
Financial assets at fair value through profit or loss [member] | Corporate equity [member]
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]
Assets at beginning of period	2,048	2,062	1,903	1,984
Change in fair value included in earnings	158	(23)	217	(27)
Change in fair value included in other comprehensive income	20	(57)	(81)	23
Purchases/Issuances	175	58	453	244
Sales	(106)	(233)	(193)	(418)
Maturities/Settlement			(4)
Transfers into Level 3				1
Transfers out of Level 3	(19)		(19)
Assets at end of period	2,276	1,807	2,276	1,807
Change in unrealized gains (losses) recorded in income for instruments still held	149	2	262	7
Financial assets at fair value through other comprehensive income, category [member]
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]
Assets at beginning of period	101	84	94	82
Change in fair value included in other comprehensive income	9		9
Purchases/Issuances	4	4	11	6
Assets at end of period	114	88	114	88
Financial assets at fair value through other comprehensive income, category [member] | Corporate equity [member]
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]
Assets at beginning of period	100	83	93	81
Change in fair value included in other comprehensive income	9		9
Purchases/Issuances	4	4	11	6
Assets at end of period	113	87	113	87
Financial assets at fair value through other comprehensive income, category [member] | U.S. states, municipalities and agencies [member]
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]
Assets at beginning of period	1	1	1	1
Assets at end of period	1	1	1	1
Business and government loans [member]
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]
Assets at beginning of period	2,841	2,028	1,945	1,736
Change in fair value included in earnings				(3)
Change in fair value included in other comprehensive income	45	95	(150)	183
Purchases/Issuances	113	765	1,812	1,705
Maturities/Settlement	(694)	(685)	(1,302)	(1,418)
Assets at end of period	2,305	2,203	2,305	2,203
Change in unrealized gains (losses) recorded in income for instruments still held			0
Fair Value Liabilities [Member] | Other Liabilities [Member]
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]
Transfers into Level 3	13		13
Assets at end of period	13		13
Derivatives Liabilities [member]
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]
Liabilities at beginning of period	4	4	4	1
Transfers into Level 3				3
Transfers out of Level 3		(1)		(1)
Liabilities at end of period	4	3	4	3
Derivatives Liabilities [member] | Credit default swaps [member]
Disclosure of reconciliation of changes in fair value measurement assets liabilities [line items]
Liabilities at beginning of period	4	4	4	1
Transfers into Level 3				3
Transfers out of Level 3		(1)		(1)
Liabilities at end of period	$ 4	$ 3	$ 4	$ 3

Capital Management - Additional

Capital Management - Additional Information (Detail)	9 Months Ended
	Jul. 31, 2021
Disclosure of capital management [abstract]
Capital conservation buffer, percentage	2.50%
Common equity surcharge, percentage	1.00%
Domestic stability buffer, percentage	1.00%
Future change in domestic stability buffer percentage	2.50%
Domestic stability buffer effective date	Oct. 31, 2021

Capital Management - Summary of

Capital Management - Summary of Regulatory Capital Measure and Risk-Weighted Assets (Detail) - CAD ($) $ in Millions	Jul. 31, 2021	Oct. 31, 2020
Fixed Rate of Instruments [Abstract]
CET1 Capital	$ 43,349	$ 40,077
Tier 1 Capital	48,826	45,840
Total Capital	56,203	54,661
Risk-Weighted Assets	322,529	336,607
Leverage Exposures	$ 969,824	$ 953,640
CET1 Capital Ratio	13.40%	11.90%
Tier 1 Capital Ratio	15.10%	13.60%
Total Capital Ratio	17.40%	16.20%
Leverage Ratio	5.00%	4.80%

Employee Compensation - Share-B

Employee Compensation - Share-Based Compensation - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Jul. 31, 2021CAD ($)	Jul. 31, 2020CAD ($)	Jul. 31, 2021CAD ($)	Jul. 31, 2020CAD ($)
Disclosure of Sharebased Payment [Line Items]
Number of stock options, Granted	0	0	984,943	976,087
Weighted average fair value of options granted	$ 10.75	$ 9.46	$ 10.75	$ 9.46

Employee Compensation - Share_2

Employee Compensation - Share-Based Compensation - Summary of Ranges of Values used for each Option Pricing Assumption (Detail)	9 Months Ended
	Jul. 31, 2021yr$ / shares	Jul. 31, 2020yr$ / shares
Disclosure of terms and conditions of share-based payment arrangement [line items]
Expected dividend yield	4.90%	4.30%
Expected share price volatility		15.40%
Risk-free rate of return	1.00%
Exercise price | $ / shares	$ 97.14	$ 101.47
Bottom of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Expected share price volatility	20.60%
Risk-free rate of return		1.90%
Expected period until exercise (in years)	6.5	6.5
Top of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Expected share price volatility	20.70%
Risk-free rate of return		2.00%
Expected period until exercise (in years)	7	7

Employee Compensation - Summary

Employee Compensation - Summary of Pension and Other Employee Future Benefit Expenses (Detail) - CAD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jul. 31, 2021	Apr. 30, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Disclosure of defined benefit plans [line items]
Total quarter pension and other employee future benefit expenses recognized in the Consolidated Statement of Income	$ 2,102	$ 2,042	$ 1,964	$ 6,263	$ 5,994
Pension Plans [member]
Disclosure of defined benefit plans [line items]
Current service cost	67		62	201	187
Net interest expense on net defined benefit (asset) liability	2		1	6	1
Administrative expenses	1		1	3	3
Benefits expense	70		64	210	191
Canada and Quebec pension plan expense	24		22	76	75
Defined contribution expense	33		37	126	135
Total quarter pension and other employee future benefit expenses recognized in the Consolidated Statement of Income	127		123	412	401
Other employee future benefit plans [member]
Disclosure of defined benefit plans [line items]
Current service cost	2		2	6	8
Net interest expense on net defined benefit (asset) liability	8		8	23	24
Benefits expense	10		10	29	32
Total quarter pension and other employee future benefit expenses recognized in the Consolidated Statement of Income	$ 10		$ 10	$ 29	$ 32

Earnings Per Share - Summary of

Earnings Per Share - Summary of Basic and Diluted Earnings Per Share (Detail) - CAD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended			9 Months Ended
	Jul. 31, 2021	Apr. 30, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Basic Earnings Per Common Share
Net income	$ 2,275	$ 1,303	$ 1,232	$ 5,595	$ 3,513
Dividends on preferred shares and distributions payable on other equity instruments	(61)		(73)	(185)	(195)
Net income available to common shareholders	$ 2,214		$ 1,159	$ 5,410	$ 3,318
Weighted-average number of common shares outstanding	647,178		641,300	646,808	640,129
Basic earnings per common share	$ 3.42	$ 1.91	$ 1.81	$ 8.36	$ 5.18
Effect of dilutive instruments
Stock options potentially exercisable	6,213		2,400	6,585	3,473
Common shares potentially repurchased	(4,394)		(2,046)	(5,229)	(2,721)
Weighted-average number of diluted common shares outstanding	648,997		641,654	648,164	640,881
Diluted Earnings Per Common Share
Net income available to common shareholders adjusted for impact of dilutive instruments	$ 2,214		$ 1,159	$ 5,410	$ 3,318
Weighted-average number of common shares outstanding	647,178		641,300	646,808	640,129
Diluted earnings per common share	$ 3.41	$ 1.91	$ 1.81	$ 8.35	$ 5.18

Earnings Per Share - Summary _2

Earnings Per Share - Summary of Basic and Diluted Earnings Per Share (Parenthetical) (Detail) - Dilutive potential shares from stock options [Member] - $ / shares	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Earnings per share [line items]
Outstanding options excluded from calculation of diluted earnings per share		4,238,334		3,124,912
Weighted-average exercise price	$ 0	$ 94.30	$ 0	$ 99.72

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) $ in Millions	9 Months Ended
	Jul. 31, 2021CAD ($)
2011 - 2016 taxation years [member]
Disclosure of Income Tax [Line items]
Additional income tax expense and interest	$ 1,210

Operating Segmentation - Additi

Operating Segmentation - Additional Information (Detail)	9 Months Ended
	Jul. 31, 2021Business
Disclosure of operating segments [line items]
Number of operating groups	3

Operating Segmentation - Summar

Operating Segmentation - Summary of Average Assets, Grouped by Operating Segment (Detail) - CAD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jul. 31, 2021	Apr. 30, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Disclosure of operating segments [line items]
Net interest income	$ 3,521		$ 3,535	$ 10,554	$ 10,441
Non-interest revenue	4,041		3,654	10,059	8,759
Total Revenue	7,562	$ 6,076	7,189	20,613	19,200
Total provision for credit losses	(70)	60	1,054	146	2,521
Insurance claims, commissions and changes in policy benefit liabilities	984	(283)	1,189	1,302	1,708
Depreciation and amortization	384		400	1,169	1,211
Other non-interest expense	3,300		3,044	10,537	9,418
Income Before Provision for Income Taxes	2,964	1,890	1,502	7,459	4,342
Provision for (recovery of) income taxes	689	587	270	1,864	829
Reported net income (loss)	2,275	$ 1,303	1,232	5,595	3,513
Average Assets	970,243		977,764	973,804	935,517
Impaired Loans [Member]
Disclosure of operating segments [line items]
Total provision for credit losses	71		446	441	1,183
Performing loans [member]
Disclosure of operating segments [line items]
Total provision for credit losses	(141)		608	(295)	1,338
Canadian P&C [member]
Disclosure of operating segments [line items]
Net interest income	1,660		1,509	4,849	4,561
Non-interest revenue	581		453	1,633	1,443
Total Revenue	2,241		1,962	6,482	6,004
Total provision for credit losses	94		570	382	1,219
Depreciation and amortization	131		126	390	385
Other non-interest expense	915		835	2,582	2,539
Income Before Provision for Income Taxes	1,101		431	3,128	1,861
Provision for (recovery of) income taxes	286		112	812	481
Reported net income (loss)	815		319	2,316	1,380
Average Assets	265,639		252,028	259,813	251,325
Canadian P&C [member] | Impaired Loans [Member]
Disclosure of operating segments [line items]
Total provision for credit losses	101		257	404	607
Canadian P&C [member] | Performing loans [member]
Disclosure of operating segments [line items]
Total provision for credit losses	(7)		313	(22)	612
US P&C [member]
Disclosure of operating segments [line items]
Net interest income	1,048		1,107	3,194	3,287
Non-interest revenue	304		292	935	912
Total Revenue	1,352		1,399	4,129	4,199
Total provision for credit losses	(62)		332	(116)	680
Depreciation and amortization	119		137	365	427
Other non-interest expense	570		615	1,689	1,903
Income Before Provision for Income Taxes	725		315	2,191	1,189
Provision for (recovery of) income taxes	172		52	514	236
Reported net income (loss)	553		263	1,677	953
Average Assets	125,840		140,615	128,722	139,196
US P&C [member] | Impaired Loans [Member]
Disclosure of operating segments [line items]
Total provision for credit losses	(9)		109	17	365
US P&C [member] | Performing loans [member]
Disclosure of operating segments [line items]
Total provision for credit losses	(53)		223	(133)	315
BMO WM [member]
Disclosure of operating segments [line items]
Net interest income	247		229	723	672
Non-interest revenue	2,179		2,255	4,795	4,727
Total Revenue	2,426		2,484	5,518	5,399
Total provision for credit losses	(2)		8	(7)	17
Insurance claims, commissions and changes in policy benefit liabilities	984		1,189	1,302	1,708
Depreciation and amortization	66		73	213	220
Other non-interest expense	847		764	2,547	2,417
Income Before Provision for Income Taxes	531		450	1,463	1,037
Provision for (recovery of) income taxes	130		109	358	261
Reported net income (loss)	401		341	1,105	776
Average Assets	48,053		46,308	47,761	45,234
BMO WM [member] | Impaired Loans [Member]
Disclosure of operating segments [line items]
Total provision for credit losses			1	3	4
BMO WM [member] | Performing loans [member]
Disclosure of operating segments [line items]
Total provision for credit losses	(2)		7	(10)	13
BMO CM [member]
Disclosure of operating segments [line items]
Net interest income	696		952	2,242	2,503
Non-interest revenue	888		576	2,454	1,445
Total Revenue	1,584		1,528	4,696	3,948
Total provision for credit losses	(94)		137	(106)	595
Depreciation and amortization	68		64	201	179
Other non-interest expense	850		761	2,432	2,256
Income Before Provision for Income Taxes	760		566	2,169	918
Provision for (recovery of) income taxes	202		140	565	210
Reported net income (loss)	558		426	1,604	708
Average Assets	367,900		379,131	371,046	370,363
BMO CM [member] | Impaired Loans [Member]
Disclosure of operating segments [line items]
Total provision for credit losses	(19)		79	20	205
BMO CM [member] | Performing loans [member]
Disclosure of operating segments [line items]
Total provision for credit losses	(75)		58	(126)	390
Corporate services [member]
Disclosure of operating segments [line items]
Net interest income	(130)		(262)	(454)	(582)
Non-interest revenue	89		78	242	232
Total Revenue	(41)		(184)	(212)	(350)
Total provision for credit losses	(6)		7	(7)	10
Depreciation and amortization				1,287
Other non-interest expense	118		69	(1,492)	303
Income Before Provision for Income Taxes	(153)		(260)		(663)
Provision for (recovery of) income taxes	(101)		(143)	(385)	(359)
Reported net income (loss)	(52)		(117)	(1,107)	(304)
Average Assets	162,811		159,682	166,462	129,399
Corporate services [member] | Impaired Loans [Member]
Disclosure of operating segments [line items]
Total provision for credit losses	(2)			(3)	2
Corporate services [member] | Performing loans [member]
Disclosure of operating segments [line items]
Total provision for credit losses	$ (4)		$ 7	$ (4)	$ 8

Divestitures - Additional Infor

Divestitures - Additional Information (Detail) £ in Millions, $ in Millions	3 Months Ended	6 Months Ended
	Apr. 30, 2021CAD ($)	Jul. 31, 2021CAD ($)	Apr. 12, 2021GBP (£)	Apr. 12, 2021CAD ($)
Statement [Line Items]
Consideration in cash			£ 615	$ 1,066
Goodwill written down value	$ 747	$ 8

Legal Proceedings - Additional

Legal Proceedings - Additional Information (Detail) $ in Billions	Oct. 31, 2020USD ($)
Legal proceedings provision [abstract]
Legal proceedings provision	$ 1.9