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Derivative Financial Instruments and Hedging (Effect of Derivative Instruments on Consolidated Statements of Income, Pre-tax, Hedges of net investment in foreign operations) (Detail) - Hedges of net investment in foreign operations - Derivatives designated as hedging instruments - JPY (¥) ¥ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023
Borrowings and bonds in foreign currencies |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gains (losses) recognized in other comprehensive income on derivative and others | ¥ (13,601) | ¥ (97,221) | ¥ (66,947)
Foreign exchange contracts |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gains (losses) recognized in other comprehensive income on derivative and others | 1,488 | (41,341) | (21,316)
Gains on sales of subsidiaries and equity method investments and liquidation losses, net | Borrowings and bonds in foreign currencies |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gains (losses) reclassified from other comprehensive income (loss) into income | 0 | 0 | 0
Gains on sales of subsidiaries and equity method investments and liquidation losses, net | Foreign exchange contracts |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gains (losses) reclassified from other comprehensive income (loss) into income | (15,995) | (87) | (7,874)
Interest expense | Borrowings and bonds in foreign currencies |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gains (losses) reclassified from other comprehensive income (loss) into income | 0 | 0 | 0
Interest expense | Foreign exchange contracts |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gains (losses) reclassified from other comprehensive income (loss) into income | ¥ 10,597 | ¥ 14,865 | 7,051
Other (income) and expense | Borrowings and bonds in foreign currencies |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gains (losses) reclassified from other comprehensive income (loss) into income |  |  | 0
Other (income) and expense | Foreign exchange contracts |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gains (losses) reclassified from other comprehensive income (loss) into income |  |  | ¥ (252)

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- Definition Gains (losses) recognized in other comprehensive income on derivative and others. + References No definition available. + Details
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- Definition Other Comprehensive Income Loss Cash Flow Hedges Gain Loss Before Reclassification And Tax. + References No definition available. + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4E + Details
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