Financial Instruments - Schedule of Interest Rate and Currency Hedging Instruments (Details) - Interest risk - Derivative hedging instruments - Cross currency interest rate swaps - JPY (¥) ¥ in Millions |
Mar. 31, 2025 |
Mar. 31, 2024 |
|---|---|---|
| Disclosure of detailed information about hedging instruments [line items] | ||
| Contract amount | ¥ 1,103,099 | ¥ 1,322,069 |
| Hedging instrument, liabilities | 70,291 | 101,128 |
| Contract amount to be settled in more than one year | ||
| Disclosure of detailed information about hedging instruments [line items] | ||
| Contract amount | ¥ 829,089 | ¥ 1,052,069 |