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Risk Management - Summary of Effect of Conditional Master Netting and Similar Arrangements (Parenthetical) (Detail) - CAD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Disclosure of offsetting of financial assets [abstract]    
Accrued interest receivable $ 725 $ 892
Accrued interest payable 902 1,114
Over-collateralized on OTC derivative assets 599 1,373
Over-collateralized on OTC derivative liabilities 875 627
Over-collateralized on securities lending and reverse purchase agreements 36 74
Over-collateralized on repurchase agreements $ 2 $ 0