Designated Accounting Hedges - Summary of Items Designated as Hedged Items (Parenthetical) (Detail) - CAD ($) $ in Millions	Oct. 31, 2019	Oct. 31, 2018
Discontinued operations [member]
Disclosure of detailed information about hedged items [line items]
Accumulated fair value hedge net liability adjustment	$ 112	$ 153

The accumulated amount of fair value hedge adjustment remaining in the statement of financial position for a hedged item that is a financial asset measured at amortised cost and has ceased to be adjusted for hedging gains and losses. [Refer: Financial assets at amortised cost; Hedged items [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 24B
-Subparagraph a
-Clause v
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_24B_a_v&doctype=Standard
-URIDate 2018-03-16

Name:	ifrs-full_AccumulatedFairValueHedgeAdjustmentRemainingInStatementOfFinancialPositionForHedgedItemThatCeasedToBeAdjustedForHedgingGainsAndLossesAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant