Restructuring costs and similar items - Summary of Restructuring Costs and Similar Items (Details) - EUR (€) € in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Disclosure of attribution of expenses by nature to their function [line items] | ||
| Employee-related expenses | € 284 | € 201 |
| Charges, gains or losses on assets | 179 | 109 |
| Costs of transformation programs | 10 | 80 |
| Others | 90 | 40 |
| Total | 563 | € 430 |
| Dynavax | ||
| Disclosure of attribution of expenses by nature to their function [line items] | ||
| Others | € 73 | |