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Income Taxes (Expiry Schedule of Net Operating Loss Carryforwards) (Detail) ¥ in Millions	Mar. 31, 2025 JPY (¥)
Income Tax Disclosure [Abstract]
2026	¥ 8,129
2027	9,828
2028	4,246
2029	24,606
2030	53,538
Thereafter	214,227
Indefinite period	54,436
Total	¥ 369,010

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- Definition

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- Definition

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- Definition

Net Operating Loss Carryforwards Expiring In Year Four

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- Definition

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- Definition

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-3

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