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Investment Contract Liabilities - Summary of Contractual Obligations and Commitments Relating to Investment Contracts (Detail) - CAD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Disclosure of Investment Contract Liabilities [line items]    
Contractual obligations and commitments $ 276,411 $ 249,771
Less than 1 year [Member]    
Disclosure of Investment Contract Liabilities [line items]    
Contractual obligations and commitments 268,537 241,301
1 to 3 years [Member]    
Disclosure of Investment Contract Liabilities [line items]    
Contractual obligations and commitments 2,978 2,749
3 to 5 years [Member]    
Disclosure of Investment Contract Liabilities [line items]    
Contractual obligations and commitments 1,408 1,789
Over 5 years [Member]    
Disclosure of Investment Contract Liabilities [line items]    
Contractual obligations and commitments $ 3,488 $ 3,932