v3.26.1
Related party transactions - Service agreements and products - General (Details)
1 Months Ended 6 Months Ended
Dec. 31, 2010
Mar. 31, 2025
shares
Jun. 30, 2026
item
Related party transactions      
Number of members of supervisory board, elected by shareholders | item     6
Vifor Fresenius Medical Care Renal Pharma Ltd.      
Related party transactions      
Ownership in associate (as a percent) 45.00%    
Maximum | Fresenius SE Companies      
Related party transactions      
Term of related party agreement to receive services     4 years
Fresenius SE      
Related party transactions      
Number of members of supervisory board, elected by shareholders | item     1
Number of company shares sold | shares   10,600,000  
Proportion of ownership interest in reporting entity (as a percent), including treasury shares     28.50%
Fresenius SE | Minimum      
Related party transactions      
Percentage of ownership interest in company intended to be retained   25.00%  
Number of shares in company intended to be retained in addition to 25% ownership | shares   1