Property, plant and equipment - Schedule of remaining minimum payments under sale-and-leaseback arrangements (Details) - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Property, plant and equipment [Line Items] | ||
| Minimum payments under sale-and-leaseback arrangements | € 29 | € 43 |
| Within 1 year | ||
| Property, plant and equipment [Line Items] | ||
| Minimum payments under sale-and-leaseback arrangements | 30 | |
| 1 to 2 years | ||
| Property, plant and equipment [Line Items] | ||
| Minimum payments under sale-and-leaseback arrangements | 24 | |
| 2 to 3 years | ||
| Property, plant and equipment [Line Items] | ||
| Minimum payments under sale-and-leaseback arrangements | 17 | |
| 3 to 4 years | ||
| Property, plant and equipment [Line Items] | ||
| Minimum payments under sale-and-leaseback arrangements | 13 | |
| 4 to 5 years | ||
| Property, plant and equipment [Line Items] | ||
| Minimum payments under sale-and-leaseback arrangements | 5 | |
| Later | ||
| Property, plant and equipment [Line Items] | ||
| Minimum payments under sale-and-leaseback arrangements | € 0 |