Long-Duration Insurance Contracts Relating to Life Insurance Operations - Schedule of Balances of Policy Account (Detail) - Fixed Annuity And Annuitization Benefits - JPY (¥) ¥ in Millions |
12 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
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| Policyholder Account Balance [Line Items] | ||
| Beginning balance | ¥ 119,093 | ¥ 138,419 |
| Transfer in | 9,865 | 9,381 |
| Surrenders and partial surrenders | (112) | (85) |
| Benefit payments and lump sum payments, etc. | (27,213) | (28,912) |
| Policy charges | (203) | (214) |
| Transfer out | (393) | (373) |
| Interests | 786 | 895 |
| Others | (41) | (18) |
| Ending balance | ¥ 101,782 | ¥ 119,093 |
| Weighted average guaranteed interest rate (%) | 0.70% | 0.70% |
| Benefits in excess of policy account balances (Millions of yen) | ¥ 0 | ¥ 0 |
| Cash surrender value (Millions of yen) | ¥ 96,433 | ¥ 113,492 |
| X | ||||||||||
- Definition Transfer from policyholder account balance to separate account. No definition available.
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- Definition Transfer to policyholder account balance from separate account. No definition available.
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- Definition Amount of cash to be paid to policyholder upon termination and surrender of long-duration contract issued by insurance entity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of interest expense for allocation to policyholder account balance. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of cash outflow to policyholder account balance from benefit payment. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of increase (decrease) in liability for policyholder account balance from change, classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of guaranteed benefit in excess of current account balance of policyholder account balance. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of decrease in liability for policyholder account balance from policy charge. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of decrease in liability for policyholder account balance from contract redemption. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Weighted-average crediting rate for liability for policyholder account balance, calculated at a point in time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount due to policyholder. Includes, but is not limited to, unpaid policy dividend, retrospective refund, and undistributed earnings on participating business. Excludes future policy benefit and claim expense. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Details
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