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v3.25.3

Acquisitions and Divestitures - Additional Information (Detail) - JPY (¥) ¥ in Millions | 6 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024
Corporate Financial Services and Maintenance Leasing |  |
Business Acquisition [Line Items] |  |
Gains (losses) on sales of subsidiaries and equity method investments and liquidation losses, net | ¥ 6,915 | ¥ 4,754
ORIX USA |  |
Business Acquisition [Line Items] |  |
Gains (losses) on sales of subsidiaries and equity method investments and liquidation losses, net | 312 | 7,547
Asia and Australia |  |
Business Acquisition [Line Items] |  |
Gains (losses) on sales of subsidiaries and equity method investments and liquidation losses, net | 1,507 |
PE Investment and Concession |  |
Business Acquisition [Line Items] |  |
Gains (losses) on sales of subsidiaries and equity method investments and liquidation losses, net | 726 | 19,086
Environmental And Energy |  |
Business Acquisition [Line Items] |  |
Gains (losses) on sales of subsidiaries and equity method investments and liquidation losses, net | 88,777 | (810)
Aircraft and Ships |  |
Business Acquisition [Line Items] |  |
Gains (losses) on sales of subsidiaries and equity method investments and liquidation losses, net |  | 1,019
Divestiture |  |
Business Acquisition [Line Items] |  |
Gains (losses) on sales of subsidiaries and equity method investments and liquidation losses, net | ¥ 98,198 | ¥ 31,503

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