Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

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No definition available.

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Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
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-Section 55
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Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

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-Publisher FASB
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Amount of cost for defined contribution plan.

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Pension Plans - Additional Information (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Japan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligations for all defined benefit pension plans	¥ 99,161	¥ 102,148
Expected pension plans contribution by Company and certain subsidiaries in 2023	3,897
Cost recognized for defined contribution pension plans of Company and certain of its subsidiaries	¥ 1,997	¥ 1,873	¥ 1,779
Japan \| Equity securities
Defined Benefit Plan Disclosure [Line Items]
Portfolio of plans	30.00%	30.00%
Japan \| Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Portfolio of plans	50.00%	50.00%
Japan \| Other Plan Asset
Defined Benefit Plan Disclosure [Line Items]
Portfolio of plans	20.00%	20.00%
Overseas plans
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligations for all defined benefit pension plans	¥ 114,930	¥ 121,459
Other Foreign Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Expected pension plans contribution by Company and certain subsidiaries in 2023	2,663
Cost recognized for defined contribution pension plans of Company and certain of its subsidiaries	¥ 2,892	¥ 2,446	¥ 2,320
Other Foreign Benefit Plans \| Equity securities
Defined Benefit Plan Disclosure [Line Items]
Portfolio of plans	50.00%	50.00%
Other Foreign Benefit Plans \| Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Portfolio of plans	50.00%	50.00%