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ORIX Corporation Shareholders' Equity (Information about Dividend Payments and Applicable Dividends) (Detail) - JPY (¥) ¥ / shares in Units, ¥ in Millions | 6 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024
O 2024 H1 Dividends |  |
Dividends Payable [Line Items] |  |
Resolution |  | The board of directors on May 16, 2024
Type of shares |  | Common stock
Total dividends paid |  | ¥ 64,405
Dividend per share |  | ¥ 55.8
Date of record for dividend |  | Mar. 31, 2024
Effective date for dividend |  | Jun. 04, 2024
Dividend resource |  | Retained earnings
O 2025 H1 Dividends |  |
Dividends Payable [Line Items] |  |
Resolution | The board of directors on May 19, 2025 |
Type of shares | Common stock |
Total dividends paid | ¥ 65,920 |
Dividend per share | ¥ 57.84 |
Date of record for dividend | Mar. 31, 2025 |
Effective date for dividend | Jun. 04, 2025 |
Dividend resource | Retained earnings |
Effective Date [Member] | O 2024 H1 Dividends |  |
Dividends Payable [Line Items] |  |
Resolution |  | The board of directors on November 8, 2024
Type of shares |  | Common stock
Total dividends paid |  | ¥ 71,185
Dividend per share |  | ¥ 62.17
Date of record for dividend |  | Sep. 30, 2024
Effective date for dividend |  | Dec. 09, 2024
Dividend resource |  | Retained earnings
Effective Date [Member] | O 2025 H1 Dividends |  |
Dividends Payable [Line Items] |  |
Resolution | The board of directors on November 12, 2025 |
Type of shares | Common stock |
Total dividends paid | ¥ 104,883 |
Dividend per share | ¥ 93.76 |
Date of record for dividend | Sep. 30, 2025 |
Effective date for dividend | Dec. 09, 2025 |
Dividend resource | Retained earnings |

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