Equity and Other Equity Items - Schedule of Dividends Declared and Paid (Details) - JPY (¥) ¥ / shares in Units, ¥ in Millions |
3 Months Ended | ||||||
|---|---|---|---|---|---|---|---|
Jun. 30, 2025 |
Dec. 31, 2024 |
Jun. 30, 2024 |
Dec. 31, 2023 |
Jun. 30, 2023 |
Dec. 31, 2022 |
Jun. 30, 2022 |
|
| Equity [abstract] | |||||||
| Dividends | ¥ 155,893 | ¥ 148,041 | ¥ 148,037 | ¥ 140,475 | ¥ 140,474 | ¥ 140,365 | |
| Dividends (in JPY per share) | ¥ 98.00 | ¥ 94.00 | ¥ 94.00 | ¥ 90.00 | ¥ 90.00 | ¥ 90.00 | |
| Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners | ¥ 154,763 | ||||||
| Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share | ¥ 98.00 | ||||||