Provisions - Schedule of funding status of the defined benefit obligations, Other Foreign Subsidiaries (Details) - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Other foreign subsidiaries | |||
| Disclosure of net defined benefit liability (asset) [line items] | |||
| Present value of the obligations | € 6,886 | € 6,903 | € 8,485 |
| Charge to the participants | 152 | 157 | 114 |
| Fair value of plan assets | 6,284 | 6,502 | 7,787 |
| Provisions - Provisions for pensions | 450 | 244 | 584 |
| Internal provisions for pensions | 1,083 | 1,084 | 1,434 |
| Net assets for pensions | (170) | (141) | (154) |
| Unrecognised net assets for pensions | (463) | € (699) | € (696) |
| Brazil | |||
| Disclosure of net defined benefit liability (asset) [line items] | |||
| Present value of the obligations | 4,569 | ||
| Charge to the participants | 152 | ||
| Fair value of plan assets | 4,730 | ||
| Provisions - Provisions for pensions | (313) | ||
| Internal provisions for pensions | 210 | ||
| Net assets for pensions | (60) | ||
| Unrecognised net assets for pensions | € (463) |