Goodwill and Other Intangible Assets - Other Amortizing Intangible Assets (Detail: Text Values) - EUR (€) € in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Intangible assets and goodwill [abstract] | |||
| Increase (decrease) of amortizing other intangible assets, net | € 130 | € 261 | € 330 |
| Amortization expenses | 1,300 | 1,200 | 1,100 |
| Of which: scheduled consumption of capitalized software | 1,200 | 1,200 | 1,100 |
| Of which: impairment of current platform software and software under construction | 16 | 29 | 24 |
| Of which: Additions to internally generated intangible assets | 1,500 | 1,400 | 1,300 |
| Of which: Positive (Negative) exchange rate changes | € (99) | € 47 | € (19) |