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v3.23.2

Pension Plans (Net Pension Cost of Defined Benefit Plans) (Detail) - JPY (¥) ¥ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
Japan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service cost | ¥ 5,704 | ¥ 6,058 | ¥ 5,831
Interest cost | 731 | 791 | 698
Expected return on plan assets | (2,739) | (2,663) | (2,427)
Amortization of prior service credit | (47) | (66) | (178)
Amortization of net actuarial loss | 79 | 412 | 1,320
Plan amendments | (44) | 0 | 0
Net periodic pension cost | 3,684 | 4,532 | 5,244
Overseas plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service cost | 3,432 | 3,947 | 3,288
Interest cost | 2,309 | 1,329 | 1,711
Expected return on plan assets | (4,982) | (4,192) | (3,618)
Amortization of prior service credit | (329) | (320) | (269)
Amortization of net actuarial loss | 9 | 500 | 313
Amortization of transition obligation | 1 | 1 | 1
Net periodic pension cost | ¥ 440 | ¥ 1,265 | ¥ 1,426

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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(4) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 + Details
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