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Insurance and Reinsurance Contract Assets and Liabilities - Summary of Significant Judgements and Estimates (Detail) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Canada [Member] | CAD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Observable years | 30 years | 30 years
Ultimate year | 70 years | 70 years
Canada [Member] | CAD [Member] | More liquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Observable years | 30 years | 30 years
Ultimate year | 70 years | 70 years
U.S. [member] | USD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Observable years | 30 years | 30 years
Ultimate year | 70 years | 70 years
U.S. [member] | USD [Member] | More liquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Observable years | 30 years | 30 years
Ultimate year | 70 years | 70 years
Japan [member | JPY [Member] | Mixed [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Observable years | 30 years | 30 years
Ultimate year | 70 years | 70 years
Hong Kong [member | HKD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Observable years | 15 years | 15 years
Ultimate year | 55 years | 55 years
1 Year [Member] | Canada [Member] | CAD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 5.17% | 5.29%
1 Year [Member] | Canada [Member] | CAD [Member] | More liquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 5.14% | 5.21%
1 Year [Member] | U.S. [member] | USD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 5.38% | 5.28%
1 Year [Member] | U.S. [member] | USD [Member] | More liquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 5.32% | 5.23%
1 Year [Member] | Japan [member | JPY [Member] | Mixed [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 0.53% | 0.72%
1 Year [Member] | Hong Kong [member | HKD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 4.20% | 4.69%
5 Year [Member] | Canada [Member] | CAD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 4.33% | 4.81%
5 Year [Member] | Canada [Member] | CAD [Member] | More liquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 4.22% | 4.63%
5 Year [Member] | U.S. [member] | USD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 4.54% | 4.87%
5 Year [Member] | U.S. [member] | USD [Member] | More liquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 4.57% | 4.88%
5 Year [Member] | Japan [member | JPY [Member] | Mixed [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 0.77% | 0.98%
5 Year [Member] | Hong Kong [member | HKD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 4.01% | 4.95%
10 Year [Member] | Canada [Member] | CAD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 4.92% | 5.35%
10 Year [Member] | Canada [Member] | CAD [Member] | More liquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 4.69% | 4.97%
10 Year [Member] | U.S. [member] | USD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 5.37% | 5.74%
10 Year [Member] | U.S. [member] | USD [Member] | More liquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 5.25% | 5.61%
10 Year [Member] | Japan [member | JPY [Member] | Mixed [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 1.08% | 0.91%
10 Year [Member] | Hong Kong [member | HKD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 4.98% | 5.60%
20 Year [Member] | Canada [Member] | CAD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 4.86% | 5.35%
20 Year [Member] | Canada [Member] | CAD [Member] | More liquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 4.72% | 5.02%
20 Year [Member] | U.S. [member] | USD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 5.65% | 5.86%
20 Year [Member] | U.S. [member] | USD [Member] | More liquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 5.56% | 5.76%
20 Year [Member] | Japan [member | JPY [Member] | Mixed [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 1.75% | 1.70%
20 Year [Member] | Hong Kong [member | HKD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 4.61% | 4.99%
30 Year [Member] | Canada [Member] | CAD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 4.80% | 5.03%
30 Year [Member] | Canada [Member] | CAD [Member] | More liquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 4.69% | 4.91%
30 Year [Member] | U.S. [member] | USD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 5.27% | 5.34%
30 Year [Member] | U.S. [member] | USD [Member] | More liquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 5.18% | 5.23%
30 Year [Member] | Japan [member | JPY [Member] | Mixed [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 2.24% | 2.22%
30 Year [Member] | Hong Kong [member | HKD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 4.19% | 4.36%
Ultimate [Member] | Canada [Member] | CAD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 4.40% | 4.40%
Ultimate [Member] | Canada [Member] | CAD [Member] | More liquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 4.40% | 4.40%
Ultimate [Member] | U.S. [member] | USD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 5.00% | 5.00%
Ultimate [Member] | U.S. [member] | USD [Member] | More liquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 4.88% | 4.88%
Ultimate [Member] | Japan [member | JPY [Member] | Mixed [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 1.60% | 1.60%
Ultimate [Member] | Hong Kong [member | HKD [Member] | Illiquid [Member] |  |
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] |  |
Years | 3.80% | 3.80%

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