v3.26.1
Acquisitions and Divestitures - Additional Information (Detail) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Business Acquisition [Line Items]        
Goodwill acquired ¥ 773,592 ¥ 621,858 ¥ 631,770 ¥ 627,683
Bargain purchase gain 0 3,750 0  
Gain on sale of controlling interest     37,930  
Retained interest, fair value disclosure     ¥ 19,540  
ORIX Credit        
Business Acquisition [Line Items]        
Sale of stock, percentage of ownership before transaction     66.00%  
Sale of stock, percentage of ownership after transaction     34.00%  
Real Estate Segment        
Business Acquisition [Line Items]        
Goodwill acquired 16,168 16,168 ¥ 16,168 16,168
Gains (losses) on sales of subsidiaries and equity method investments and liquidation losses, net   350    
Corporate Financial Services and Maintenance Leasing        
Business Acquisition [Line Items]        
Goodwill acquired 13,215 13,383 15,051 15,105
Gains (losses) on sales of subsidiaries and equity method investments and liquidation losses, net 6,918 7,294    
ORIX USA        
Business Acquisition [Line Items]        
Goodwill acquired 273,640 168,559 171,880 151,582
Gains (losses) on sales of subsidiaries and equity method investments and liquidation losses, net 3,164 29,224 (1,978)  
Asia and Australia        
Business Acquisition [Line Items]        
Goodwill acquired 6,114 5,839 5,982 5,428
Bargain purchase gain   3,750    
Gains (losses) on sales of subsidiaries and equity method investments and liquidation losses, net 5,412 115    
PE Investment and Concession        
Business Acquisition [Line Items]        
Gains (losses) on sales of subsidiaries and equity method investments and liquidation losses, net   44,503 19,822  
ORIX Europe        
Business Acquisition [Line Items]        
Goodwill acquired 199,107 176,608 177,515 158,588
Gains (losses) on sales of subsidiaries and equity method investments and liquidation losses, net 8,762 (624) 2,502  
Environmental And Energy        
Business Acquisition [Line Items]        
Gains (losses) on sales of subsidiaries and equity method investments and liquidation losses, net 86,645 6,365 (5,557)  
Aircraft and Ships        
Business Acquisition [Line Items]        
Goodwill acquired 1,527 1,201 0 ¥ 0
Gains (losses) on sales of subsidiaries and equity method investments and liquidation losses, net 408 478    
Banking and Credit Segment        
Business Acquisition [Line Items]        
Gains (losses) on sales of subsidiaries and equity method investments and liquidation losses, net     57,470  
Series of Individually Immaterial Business Acquisitions        
Business Acquisition [Line Items]        
Acquisitions consideration, cost of acquired entity paid in cash 165,859 33,041 11,894  
Goodwill acquired 150,974 9,081 4,241  
Acquired intangible assets other than goodwill 35,014 21,684 7,049  
Divestiture        
Business Acquisition [Line Items]        
Gains (losses) on sales of subsidiaries and equity method investments and liquidation losses, net ¥ 111,311 ¥ 87,705 ¥ 72,488