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Long-Duration Insurance Contracts - Discount Rates for LFPB (Details) | Mar. 31, 2024 | Mar. 31, 2023
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Whole Life Insurance | Minimum |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Interest accretion rate | 1.70% | 1.70%
Current discount rate | 4.60% | 4.70%
Whole Life Insurance | Maximum |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Interest accretion rate | 4.90% | 4.90%
Current discount rate | 5.40% | 5.00%
Term Life Insurance | Minimum |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Interest accretion rate | 4.20% | 4.10%
Current discount rate | 5.20% | 4.90%
Term Life Insurance | Maximum |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Interest accretion rate | 4.20% | 4.30%
Current discount rate | 5.30% | 5.00%
Experience Life Insurance |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Interest accretion rate | 6.10% | 6.10%
Current discount rate | 5.30% | 5.00%
Limited Pay Whole Life Insurance |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Interest accretion rate | 4.00% | 3.90%
Current discount rate | 5.40% | 5.00%
Supplemental health | Minimum |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Interest accretion rate | 1.70% | 1.70%
Current discount rate | 5.30% | 5.00%
Supplemental health | Maximum |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Interest accretion rate | 2.70% | 2.70%
Current discount rate | 5.40% | 5.20%
Life Contingent SPIA Retirement Insurance | Minimum |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Interest accretion rate | 1.70% | 1.70%
Current discount rate | 5.20% | 4.90%
Life Contingent SPIA Retirement Insurance | Maximum |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Interest accretion rate | 4.10% | 4.10%
Current discount rate | 5.20% | 5.00%

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