Equity - Transactions related to treasury shares (Details) - EUR (€) € in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Equity [Line Items] | |||
| Share-based compensation plans | € 159 | € 101 | € 91 |
| Total shareholders' equity | |||
| Equity [Line Items] | |||
| Share-based compensation plans | 159 | 101 | 91 |
| Treasury shares | |||
| Equity [Line Items] | |||
| Share-based compensation plans | 113 | 54 | 54 |
| Share-based compensation | |||
| Equity [Line Items] | |||
| Share-based compensation plans | 85 | 65 | 61 |
| Purchase of treasury shares | (60) | (36) | (29) |
| Share-based compensation cost | 141 | 96 | 88 |
| Income tax | 4 | 5 | 2 |
| Retained earnings | |||
| Equity [Line Items] | |||
| Share-based compensation plans | € (39) | € (18) | € (24) |