Financial instruments - Foreign exchange risk management (Details) - Foreign exchange risk - EUR (€) € in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| USD | ||
| Financial instruments | ||
| Strengthening of euro for sensitivity analysis | 10.00% | |
| Impact on net income attributable to shareholders of FME AG due to strengthening of euro | € (88,942) | |
| Impact on other comprehensive income due to strengthening of euro | € (1,298,437) | |
| Weakening of euro for sensitivity analysis | 10.00% | |
| Impact on net income attributable to shareholders of FME AG due to weakening of euro | € 108,707 | |
| Impact on other comprehensive income due to weakening of euro | 1,586,979 | |
| Derivatives - cash flow hedging instruments | ||
| Financial instruments | ||
| Notional amount | € 789,230 | € 475,890 |
| Derivatives, maturity | 34 months | |
| Derivatives - not designated as hedging instruments | ||
| Financial instruments | ||
| Notional amount | € 2,381,239 | € 2,421,508 |