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v3.25.3

Long-Duration Insurance Contracts - Weighted-Average Durations of LFPB (Details) | Sep. 30, 2025 | Sep. 30, 2024
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Whole Life |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Weighted-average duration | 20 years 3 months 18 days | 17 years 8 months 12 days
Term Life |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Weighted-average duration | 16 years 2 months 12 days | 16 years 4 months 24 days
Experience life |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Weighted-average duration | 9 years 7 months 6 days | 10 years 2 months 12 days
Limited-Pay Whole Life |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Weighted-average duration | 25 years 6 months | 21 years 6 months
Supplemental health |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Weighted-average duration | 11 years 8 months 12 days | 11 years 3 months 18 days
SPIA (life contingent) |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Weighted-average duration | 7 years 4 months 24 days | 8 years

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- Definition Weighted-average duration of liability for future policy benefit, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b)(5) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-6 + Details
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