Pension Plans and Other Benefit Plans - Defined Contribution Plans - Narrative (Details) - EUR (€) € in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Pension plans | ||
| Post-employment benefit expense, defined contribution plans | € 14 | € 13 |
| Savings plan and profit-sharing plan, percentage of contributions matched by entity up to the first threshold level | 100.00% | |
| Savings plan and profit-sharing plan, first threshold level for employee contributions to plan | 4.00% | |
| Savings plan and profit-sharing plan, percentage of contributions matched by entity on employee contributions between first and second thresholds | 50.00% | |
| Savings plan and profit-sharing plan, difference between first and second threshold level | 2.00% | |
| Savings plan and profit-sharing plan, cost of matching contributions | € 36 | 34 |
| Spain | ||
| Pension plans | ||
| Post-employment benefit expense, defined contribution plans | € 1 | € 1 |