v3.25.3
Financial instruments - Derivative and non-derivative financial instruments (Details)
€ in Thousands, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
EUR (€)
Aug. 31, 2025
Sep. 30, 2025
EUR (€)
Sep. 30, 2025
USD ($)
Apr. 30, 2024
GWh / yr
item
Sep. 30, 2025
EUR (€)
Sep. 30, 2024
EUR (€)
Sep. 30, 2025
EUR (€)
Sep. 30, 2025
USD ($)
Sep. 30, 2024
EUR (€)
Dec. 31, 2024
EUR (€)
Reconciliation of changes in fair value measurement                      
Distributions to noncontrolling interests               € 505,304   € 178,661  
Transactions with noncontrolling interests without loss of control               (356,527)   (594)  
Put option liabilities               328,407   46,454  
Income tax expense           € 75,225 € 116,534 214,528   255,058  
Assets at beginning of period               33,566,579      
Assets at end of period € 30,887,005   € 30,887,005     30,887,005 € 32,510,801 30,887,005   32,510,801 € 33,566,579
Liabilities at beginning of period               17,798,066      
Liabilities at end of period € 16,978,599   16,978,599     16,978,599   16,978,599     17,798,066
InterWell Health LLC                      
Reconciliation of changes in fair value measurement                      
Ownership percentage 92.00% 75.00%                  
Noncontrolling interests                      
Reconciliation of changes in fair value measurement                      
Transactions with noncontrolling interests without loss of control               (83,692)   2,689  
Additional paid in capital                      
Reconciliation of changes in fair value measurement                      
Transactions with noncontrolling interests without loss of control               (272,835)   (3,283)  
Retained earnings                      
Reconciliation of changes in fair value measurement                      
Put option liabilities               328,407   46,454  
Shareholders of Interwell Health                      
Reconciliation of changes in fair value measurement                      
Settlement of put options held by non-physician investors     311,614 $ 363,272              
Distributions to noncontrolling interests               311,614      
Increase (decrease) in put option liabilities               (312,941)      
Income tax expense               (34,679) $ (38,792)    
Shareholders of Interwell Health | Noncontrolling interests                      
Reconciliation of changes in fair value measurement                      
Transactions with noncontrolling interests without loss of control               (76,201)      
Shareholders of Interwell Health | Additional paid in capital                      
Reconciliation of changes in fair value measurement                      
Transactions with noncontrolling interests without loss of control               (235,413)      
Shareholders of Interwell Health | Retained earnings                      
Reconciliation of changes in fair value measurement                      
Put option liabilities               312,941      
Maximum                      
Reconciliation of changes in fair value measurement                      
Term of virtual power purchase agreement         15 years            
Germany                      
Reconciliation of changes in fair value measurement                      
Number of wind and solar energy project developers who signed contracts with company | item         2            
Expected annual electricity production under VPPAs | GWh / yr         125            
United States                      
Reconciliation of changes in fair value measurement                      
Number of wind and solar energy project developers who signed contracts with company | item         1            
Expected annual electricity production under VPPAs | GWh / yr         458            
Percentage of company's 2024 electricity consumption covered by vPPAs         54.00%            
European Union                      
Reconciliation of changes in fair value measurement                      
Percentage of company's 2024 electricity consumption covered by vPPAs         72.00%            
Derivatives embedded in vPPAs | Fair Value | Level 3                      
Reconciliation of changes in fair value measurement                      
Assets (liabilities) at beginning of period               (25,394)      
Settlements               8,663     460
Gain (loss) recognized in profit or loss               16,162     (24,959)
Foreign currency translation and other changes               1,127     (895)
Assets (liabilities) at end of period € 558   € 558     € 558   € 558     (25,394)
Derivatives embedded in vPPAs | Fair Value | Level 3 | Expected electricity prices                      
Reconciliation of changes in fair value measurement                      
Increase in input 10.00%   10.00% 10.00%   10.00%   10.00% 10.00%    
Decrease in input 10.00%   10.00% 10.00%   10.00%   10.00% 10.00%    
Sensitivity of derivatives embedded in vPPAs to increase in input               € 26,135      
Sensitivity of derivatives embedded in vPPAs to decrease in input               € (25,986)      
Derivatives embedded in vPPAs | Fair Value | Level 3 | Expected production volumes                      
Reconciliation of changes in fair value measurement                      
Increase in input 10.00%   10.00% 10.00%   10.00%   10.00% 10.00%    
Decrease in input 10.00%   10.00% 10.00%   10.00%   10.00% 10.00%    
Sensitivity of derivatives embedded in vPPAs to increase in input               € 56      
Sensitivity of derivatives embedded in vPPAs to decrease in input               € (56)      
Derivatives embedded in vPPAs | Fair Value | Level 3 | Expected interest rates                      
Reconciliation of changes in fair value measurement                      
Increase in input 1.00%   1.00% 1.00%   1.00%   1.00% 1.00%    
Decrease in input 1.00%   1.00% 1.00%   1.00%   1.00% 1.00%    
Sensitivity of derivatives embedded in vPPAs to increase in input               € 426      
Sensitivity of derivatives embedded in vPPAs to decrease in input               (515)      
Equity investments | Fair Value | Level 3                      
Reconciliation of changes in fair value measurement                      
Assets at beginning of period               29,154   32,002 32,002
Increase               1,553     3,085
Gain / loss recognized in profit or loss               (12,422)     (7,773)
Foreign currency translation and other changes               (2,843)     1,840
Assets at end of period € 15,442   € 15,442     € 15,442   15,442     29,154
Other financial assets measured at FVPL | Fair Value | Level 3                      
Reconciliation of changes in fair value measurement                      
Assets at beginning of period               142,264      
Increase               7,397     41,225
Decrease               (16,176)     (2,292)
Reclassifications                     90,457
Gain / loss recognized in profit or loss               (8,564)     4,987
Foreign currency translation and other changes               (14,533)     7,887
Assets at end of period 110,388   110,388     110,388   110,388     142,264
Variable payments outstanding for acquisitions | Fair Value | Level 3                      
Reconciliation of changes in fair value measurement                      
Liabilities at beginning of period               7,933   35,751 35,751
Increase               678     86
Decrease               (4,649)     (23,472)
Gain / loss recognized in profit or loss               (942)     (4,796)
Foreign currency translation and other changes               (594)     364
Liabilities at end of period 2,426   2,426     2,426   2,426     7,933
Put option liabilities | Fair Value | Level 3                      
Reconciliation of changes in fair value measurement                      
Liabilities at beginning of period               1,299,117   € 1,372,008 1,372,008
Increase               14,431     8,127
Decrease               (335,735)     (71,990)
Gain / loss recognized in equity               (7,103)     (91,987)
Foreign currency translation and other changes               (142,380)     82,959
Liabilities at end of period € 828,330   € 828,330     € 828,330   € 828,330     € 1,299,117
Put option liabilities | Fair Value | Level 3 | Assumed earnings or enterprise value                      
Reconciliation of changes in fair value measurement                      
Increase in input, liabilities 10.00%   10.00% 10.00%   10.00%   10.00% 10.00%    
Increase (decrease) in fair value due to increase in input, liabilities               € 67,206      
Put option liabilities | Fair Value | Level 3 | Assumed earnings or enterprise value | Maximum                      
Reconciliation of changes in fair value measurement                      
Increase in fair value due to increase in input, as percentage of total liabilities 1.00%   1.00% 1.00%   1.00%   1.00% 1.00%    
Increase in fair value due to increase in input, as percentage of equity 1.00%   1.00% 1.00%   1.00%   1.00% 1.00%