Basis of preparation and significant changes in the current reporting period - Reconciliation net result under IFRS-EU and IFRS-IASB (Details) - EUR (€) € in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Disclosure of Reconciliation Net Result EU IFRS and IASB IFRS [Abstract] | ||
| In accordance with IFRS-EU (attributable to the shareholders of the parent) | € 3,503 | € 3,130 |
| Adjustment of the EU IAS 39 carve-out | (439) | 1,065 |
| Tax effect of the adjustment | 120 | (279) |
| Effect of adjustment after tax | (319) | 786 |
| Shareholders of the parent | € 3,184 | € 3,915 |