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ORIX Corporation Shareholders' Equity - Additional Information (Detail) - JPY (¥)
¥ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Class of Stock [Line Items]      
Amount available for dividends under the Japanese Companies Act ¥ 1,026,960    
Equity in undistributed earnings of the companies accounted for by the equity method 123,872 ¥ 57,182 ¥ 36,774
Restricted net assets of certain subsidiaries include regulatory capital requirements for banking and life insurance operations 11,040    
Retained Earnings      
Class of Stock [Line Items]      
Equity in undistributed earnings of the companies accounted for by the equity method 182,298    
Annual Dividends 2025 [Member]      
Class of Stock [Line Items]      
Dividends to be distributed to shareholders ¥ 68,675    
Declared date of dividends to be distributed to shareholders 2026-05    
Record date of dividends to be distributed to shareholders Mar. 31, 2026