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ORIX Corporation Shareholders' Equity - Additional Information (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Class of Stock [Line Items]
Amount available for dividends under the Japanese Companies Act	¥ 914,462
Equity in undistributed earnings of the companies accounted for by the equity method	57,182	¥ 36,774	¥ 22,081
Restricted net assets of certain subsidiaries include regulatory capital requirements for banking and life insurance operations	12,031
Retained Earnings
Class of Stock [Line Items]
Equity in undistributed earnings of the companies accounted for by the equity method	124,403
Annual Dividends 2025 [Member]
Class of Stock [Line Items]
Dividends to be distributed to shareholders	¥ 65,920
Declared date of dividends to be distributed to shareholders	2025-05
Record date of dividends to be distributed to shareholders	Mar. 31, 2025

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