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Income Taxes (Tax Effects of Temporary Differences and Carryforwards Giving Rise to Deferred Tax Assets and Liabilities) (Parenthetical) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2025	Mar. 31, 2024
Income Taxes [Line Items]
Deferred Tax Assets, Other	[1]	¥ 159,391	¥ 156,516
Related To Changes In Foreign Exchange Rate [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Other		¥ 96,778	¥ 95,551
[1] As of March 31, 2024 and 2025, other deferred tax assets includes amounts related to net investment hedges of ¥95,551 million and ¥96,778 million.

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- Definition

Income Taxes [Line Items]

+ References

No definition available.

+ Details

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- Definition

Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-6

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- Details

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