Related party transactions - Balances of Receivables and Payables with Associates and Joint Ventures (Detail) - JPY (¥) ¥ in Millions |
Mar. 31, 2025 |
Mar. 31, 2024 |
|---|---|---|
| Trade accounts and other receivables | ||
| Amounts receivable, related party transactions | ¥ 545,671 | ¥ 609,805 |
| Trade accounts and other payables | ||
| Amounts payable, related party transactions | 1,584,702 | 1,432,815 |
| Associates [Member] | ||
| Trade accounts and other receivables | ||
| Amounts receivable, related party transactions | 466,420 | 464,728 |
| Trade accounts and other payables | ||
| Amounts payable, related party transactions | 1,576,129 | 1,423,147 |
| Joint ventures [Member] | ||
| Trade accounts and other receivables | ||
| Amounts receivable, related party transactions | 79,251 | 145,077 |
| Trade accounts and other payables | ||
| Amounts payable, related party transactions | ¥ 8,573 | ¥ 9,668 |