v3.25.4
Related party transactions - Lease Agreements - Summary (Details) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Lease Transactions      
Depreciation € 647,620 € 675,526 € 700,671
Interest expense 143,211 148,420 148,789
Leases balances      
Right-of-use asset 3,013,502 3,612,456  
Fresenius Medical Care Deutschland GmbH | Production sites in Schweinfurt and St. Wendel, Germany | Fresenius SE Companies      
Leases balances      
Total transaction cost for previously leased assets 181,373    
Purchase price for previously leased assets 171,642    
Lease Agreements      
Lease Transactions      
Depreciation 23,253 24,938 25,555
Interest expense 1,514 2,213 2,586
Lease expense 233 398 291
Leases balances      
Right-of-use asset 17,522 110,041  
Lease liability 18,102 112,863  
Fresenius SE | Lease Agreements      
Lease Transactions      
Depreciation 6,757 6,591 7,738
Interest expense 230 306 1,148
Lease expense 233 398 291
Leases balances      
Right-of-use asset 17,522 22,997  
Lease liability 18,102 24,953  
Fresenius SE affiliates | Lease Agreements      
Lease Transactions      
Depreciation 16,496 18,347 17,817
Interest expense € 1,284 1,907 € 1,438
Leases balances      
Right-of-use asset   87,044  
Lease liability   € 87,910