v3.26.1
Financial Risk Management - Summary of Retail Receivables Included In Consumer Finance Receivables (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2026
Mar. 31, 2025
Disclosure Of Finance Receivables [Line Items]    
Consumer finance receivables ¥ 9,893,496 ¥ 8,928,617
Retail [member]    
Disclosure Of Finance Receivables [Line Items]    
Consumer finance receivables [1] 8,903,853 8,034,504
12-month ECL [member] | Retail [member]    
Disclosure Of Finance Receivables [Line Items]    
Consumer finance receivables [1] 7,947,857 7,060,827
Not credit-impaired [member] | Lifetime ECL [member] | Retail [member]    
Disclosure Of Finance Receivables [Line Items]    
Consumer finance receivables [1] 897,300 932,769
Credit-impaired [member] | Lifetime ECL [member] | Retail [member]    
Disclosure Of Finance Receivables [Line Items]    
Consumer finance receivables [1] ¥ 58,696 ¥ 40,908
[1] The tables above represent the gross amounts of retail receivables by stages of ECL model since the expected credit losses are measured collectively by our finance subsidiaries and the balances of those receivables are not directly allocated to the risk ratings.