v3.26.1
Other Financial Assets - Summary of Other Financial Assets (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2026
Mar. 31, 2025
Disclosure of financial assets [line items]    
Other financial assets ¥ 1,508,493 ¥ 1,081,937
Current assets 296,974 208,478
Non-current assets 1,211,519 873,459
Derivatives to which hedge accounting is applied [Member]    
Disclosure of financial assets [line items]    
Other financial assets 64,541
Financial assets measured at amortized cost [member] | Receivables other than trade receivables and receivables from financial services [member]    
Disclosure of financial assets [line items]    
Other financial assets 291,627 120,067
Financial assets measured at amortized cost [member] | Debt securities [member]    
Disclosure of financial assets [line items]    
Other financial assets 41,564 84,018
Financial assets measured at amortized cost [member] | Guaranty deposits [member]    
Disclosure of financial assets [line items]    
Other financial assets 15,837 15,297
Financial assets measured at amortized cost [member] | Restricted cash [member]    
Disclosure of financial assets [line items]    
Other financial assets 112,937 117,260
Financial assets measured at amortized cost [member] | Other [member]    
Disclosure of financial assets [line items]    
Other financial assets 8,523 11,063
Financial assets measured at amortized cost [member] | Allowance for impairment losses [member]    
Disclosure of financial assets [line items]    
Other financial assets (2,409) (2,513)
Financial assets measured at fair value through other comprehensive income [member] | Debt securities [member]    
Disclosure of financial assets [line items]    
Other financial assets 31,920 34,872
Financial assets measured at fair value through other comprehensive income [member] | Equity securities [member]    
Disclosure of financial assets [line items]    
Other financial assets 633,875 434,592
Financial assets measured at fair value through profit or loss [member] | Derivatives [member]    
Disclosure of financial assets [line items]    
Other financial assets 182,244 133,077
Financial assets measured at fair value through profit or loss [member] | Debt securities [member]    
Disclosure of financial assets [line items]    
Other financial assets ¥ 127,834 ¥ 134,204