v3.25.2
Financial Risks - Summary of Net Changes in the Allowance for Credit Losses (Detail) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Disclosure of financial assets [line items]    
Provision for credit loss, net of reversal ¥ 9,835 ¥ 4,708
Charge-offs (3,128) (3,759)
Other (1,516) (472)
Finance lease receivables [Member]    
Disclosure of financial assets [line items]    
Allowance for credit loss at beginning of year 46,909 36,920
Provision for credit loss, net of reversal 31,539 23,617
Charge-offs (10,311) (7,676)
Other (11,417) (5,952)
Allowance for credit loss at end of year 56,721 46,909
Retail receivables [Member]    
Disclosure of financial assets [line items]    
Allowance for credit loss at beginning of year 336,152 274,871
Provision for credit loss, net of reversal 277,127 241,427
Charge-offs (189,044) (150,458)
Other (67,931) (29,688)
Allowance for credit loss at end of year 356,304 336,152
Retail receivables [Member] | Expected credit loss for 12 months [Member]    
Disclosure of financial assets [line items]    
Allowance for credit loss at beginning of year 111,044 95,720
Provision for credit loss, net of reversal 36,053 34,386
Other (29,265) (19,062)
Allowance for credit loss at end of year 117,832 111,044
Retail receivables [Member] | Expected credit loss for the entire period [Member] | Financial receivable not credit-impaired [Member]    
Disclosure of financial assets [line items]    
Allowance for credit loss at beginning of year 147,790 124,867
Provision for credit loss, net of reversal 59,305 64,742
Other (56,209) (41,819)
Allowance for credit loss at end of year 150,885 147,790
Retail receivables [Member] | Expected credit loss for the entire period [Member] | Credit-impaired financial receivable [Member]    
Disclosure of financial assets [line items]    
Allowance for credit loss at beginning of year 77,318 54,284
Provision for credit loss, net of reversal 181,769 142,299
Charge-offs (189,044) (150,458)
Other 17,543 31,193
Allowance for credit loss at end of year 87,587 77,318
Wholesale receivables and other dealer loans [Member]    
Disclosure of financial assets [line items]    
Allowance for credit loss at beginning of year 31,213 24,622
Provision for credit loss, net of reversal 16,050 10,031
Charge-offs (698) (204)
Other (8,774) (3,236)
Allowance for credit loss at end of year 37,791 31,213
Wholesale receivables and other dealer loans [Member] | Expected credit loss for 12 months [Member]    
Disclosure of financial assets [line items]    
Allowance for credit loss at beginning of year 17,481 14,640
Provision for credit loss, net of reversal 10,856 6,362
Other (3,641) (3,521)
Allowance for credit loss at end of year 24,697 17,481
Wholesale receivables and other dealer loans [Member] | Expected credit loss for the entire period [Member] | Financial receivable not credit-impaired [Member]    
Disclosure of financial assets [line items]    
Allowance for credit loss at beginning of year 5,931 4,582
Provision for credit loss, net of reversal 3,746 2,539
Other (2,658) (1,191)
Allowance for credit loss at end of year 7,018 5,931
Wholesale receivables and other dealer loans [Member] | Expected credit loss for the entire period [Member] | Credit-impaired financial receivable [Member]    
Disclosure of financial assets [line items]    
Allowance for credit loss at beginning of year 7,801 5,399
Provision for credit loss, net of reversal 1,448 1,130
Charge-offs (698) (204)
Other (2,475) 1,475
Allowance for credit loss at end of year ¥ 6,076 ¥ 7,801