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Insurance Contract Liabilities and Reinsurance Assets - Summary of Insurance Contract Liabilities, Payments Due by Period (Detail) $ in Millions | Dec. 31, 2020 CAD ($)
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Disclosure of types of insurance contracts [Line Items] |
Insurance contract liabilities | $ 827,727
Less than 1 year [Member] |
Disclosure of types of insurance contracts [Line Items] |
Insurance contract liabilities | 10,672
1 to 3 years [Member] |
Disclosure of types of insurance contracts [Line Items] |
Insurance contract liabilities | 9,859
3 to 5 years [Member] |
Disclosure of types of insurance contracts [Line Items] |
Insurance contract liabilities | 15,416
Over 5 years [Member] |
Disclosure of types of insurance contracts [Line Items] |
Insurance contract liabilities | $ 791,780

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