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Business, Basis of Presentation and Summary of Significant Accounting Policies -Upper-Medium Grade Discount Rate (Details) | Dec. 31, 2024
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JAPAN |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input | 10
Republic of Korea |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input | 5
CHILE |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input | 10
Measurement Input, Credit Spread | JAPAN | Minimum |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input | 10
Measurement Input, Credit Spread | JAPAN | Maximum |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input | 30
Measurement Input, Credit Spread | Republic of Korea | Minimum |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input | 5
Measurement Input, Credit Spread | Republic of Korea | Maximum |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input | 30
Measurement Input, Credit Spread | CHILE | Minimum |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input | 10
Measurement Input, Credit Spread | CHILE | Maximum |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input | 25

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