v3.26.1
Goodwill and Other Intangible Assets - Additional Information (Detail) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Intangible Assets by Major Class [Line Items]      
Impairment losses on goodwill ¥ 53,016 ¥ 6,695 ¥ 0
Aggregate amortization expenses for intangible assets 41,402 41,402 39,213
Estimated amortization expenses in fiscal 2027 45,089    
Estimated amortization expenses in fiscal 2028 42,282    
Estimated amortization expenses in fiscal 2029 39,024    
Estimated amortization expenses in fiscal 2030 34,053    
Estimated amortization expenses in fiscal 2031 29,820    
Intangible assets subject to amortization acquired 104,248    
PE Investment and Concession Segment      
Intangible Assets by Major Class [Line Items]      
Impairment of intangible assets excluding goodwill 1,092 5,629 24
ORIX USA      
Intangible Assets by Major Class [Line Items]      
Impairment losses on goodwill 52,738 1,175 0
Environment and Energy      
Intangible Assets by Major Class [Line Items]      
Impairment losses on goodwill 0 0 0
Impairment of intangible assets excluding goodwill 3,614   87
ORIX Europe      
Intangible Assets by Major Class [Line Items]      
Impairment losses on goodwill 0 0 0
Impairment of intangible assets excluding goodwill   1,971  
Asia and Australia      
Intangible Assets by Major Class [Line Items]      
Impairment losses on goodwill 0 0 0
Impairment of intangible assets excluding goodwill     37
PE Investment And Concession [Member]      
Intangible Assets by Major Class [Line Items]      
Impairment losses on goodwill 0 5,520 0
Impairment of intangible assets excluding goodwill   148  
Banking and Credit [Member]      
Intangible Assets by Major Class [Line Items]      
Impairment losses on goodwill 0 0 0
Impairment of intangible assets excluding goodwill   ¥ 84  
Impairment, Intangible Asset, Statement of Income or Comprehensive Income [Extensible Enumeration]   Selling, General and Administrative Expense  
Corporate      
Intangible Assets by Major Class [Line Items]      
Impairment losses on goodwill 278 ¥ 0 ¥ 0
Software      
Intangible Assets by Major Class [Line Items]      
Intangible assets subject to amortization acquired ¥ 22,397    
Weighted average amortization period 5 years    
Customer relationships and others      
Intangible Assets by Major Class [Line Items]      
Intangible assets subject to amortization acquired ¥ 24,031    
Weighted average amortization period 10 years    
Maintenance intangible assets      
Intangible Assets by Major Class [Line Items]      
Intangible assets subject to amortization acquired ¥ 45,738    
Weighted average amortization period 6 years