Commitments and contingent liabilities - Summary of Potential Future Lease Commitments and Other Commitments Fall Due (Details) - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure Of Lease And Other Commitments [Line Items] | ||
| Minimum lease payments payable under non-cancellable lease | € 212 | € 330 |
| Other commitments | 3,487 | 4,198 |
| Within 1 year | ||
| Disclosure Of Lease And Other Commitments [Line Items] | ||
| Minimum lease payments payable under non-cancellable lease | 89 | 101 |
| Other commitments | 1,371 | 1,654 |
| Later than 1 year but not later than 5 years | ||
| Disclosure Of Lease And Other Commitments [Line Items] | ||
| Minimum lease payments payable under non-cancellable lease | 80 | 163 |
| Other commitments | 1,848 | 2,360 |
| Later than 5 years | ||
| Disclosure Of Lease And Other Commitments [Line Items] | ||
| Minimum lease payments payable under non-cancellable lease | 43 | 66 |
| Other commitments | € 268 | € 184 |