Pension Plans (Defined Benefit Plan Amount Recognized in Accumulated Other Comprehensive Income (Loss), Pre-tax) (Detail) - JPY (¥) ¥ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
|---|---|---|
| Japanese plans | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Net prior service credit | ¥ 601 | ¥ 666 |
| Net actuarial gain (loss) | 25,940 | 5,750 |
| Net transition obligation | 0 | 0 |
| Total recognized in accumulated other comprehensive loss, pre-tax | 26,541 | 6,416 |
| Overseas plans | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Net prior service credit | (838) | (502) |
| Net actuarial gain (loss) | 17,953 | 12,865 |
| Net transition obligation | 9 | 8 |
| Total recognized in accumulated other comprehensive loss, pre-tax | ¥ 17,124 | ¥ 12,371 |
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- Definition Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, before tax, of accumulated other comprehensive income (loss) for transition asset (obligation) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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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