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Designated Accounting Hedges - Summary of Items Designated as Hedged Items (Parenthetical) (Detail) - Discontinued operations [member] - CAD ($)
$ in Millions
Oct. 31, 2022
Oct. 31, 2021
Disclosure of detailed information about hedged items [line items]    
AOCI related to discontinued cash flow hedges $ (62) $ 73
Accumulated fair value hedge net asset adjustment   $ 44
Accumulated fair value hedge net liability adjustment $ 537