Fair Value - Carrying Amounts and Fair Values of Financial Assets and Financial Liabilities Measured at Amortized Cost (Detail) - JPY (¥) ¥ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
|---|---|---|
| Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items] | ||
| Receivables from financial services | ¥ 9,893,496 | ¥ 8,928,617 |
| Debt securities | 1,508,493 | 1,081,937 |
| Financing liabilities | 13,479,863 | 11,451,267 |
| Debt securities [member] | ||
| Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items] | ||
| Debt securities | 41,564 | 84,018 |
| Fair value [member] | ||
| Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items] | ||
| Receivables from financial services | 9,819,841 | 8,845,750 |
| Financing liabilities | 13,407,833 | 11,388,668 |
| Fair value [member] | Debt securities [member] | ||
| Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items] | ||
| Debt securities | ¥ 41,564 | ¥ 84,018 |