Provisions - Schedule of details of provisions (Details) - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|---|---|---|---|---|
| Disclosure of other provisions [line items] | ||||
| Provisions | € 8,355 | € 8,407 | € 8,441 | € 8,149 |
| Post-employment plans | ||||
| Disclosure of other provisions [line items] | ||||
| Provisions | 1,656 | 1,731 | 2,225 | 2,392 |
| Other long term employee benefits | ||||
| Disclosure of other provisions [line items] | ||||
| Provisions | 993 | 915 | 880 | 950 |
| Taxes and other legal contingencies | ||||
| Disclosure of other provisions [line items] | ||||
| Provisions | 2,989 | 2,717 | 2,715 | |
| Contingent liabilities and commitments | ||||
| Disclosure of other provisions [line items] | ||||
| Provisions | 713 | 710 | 702 | € 734 |
| Other provisions | ||||
| Disclosure of other provisions [line items] | ||||
| Provisions | € 2,004 | € 2,334 | € 1,919 |