v3.26.1
Equity - Reserves for Other Comprehensive Income (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Reserves within equity    
Balance € 55,648 € 53,644
Balance 52,787 55,648
Reserve for OCI on cash flow hedge derivatives    
Reserves within equity    
Balance (612) 36
Changes of the year 464 (735)
Currency translation differences 2  
Changes in scope of consolidation and non-controlling interest 18  
Reversal to inventories adjustments 4  
Reclassification adjustments 166 87
Balance 42 (612)
Reserve for OCI on cash flow hedge derivatives | Gross reserve    
Reserves within equity    
Balance (861) 50
Changes of the year 661 (1,034)
Currency translation differences 3  
Changes in scope of consolidation and non-controlling interest 27  
Reversal to inventories adjustments 5  
Reclassification adjustments 233 123
Balance 68 (861)
Reserve for OCI on cash flow hedge derivatives | Deferred tax liabilities, gross    
Reserves within equity    
Balance 249 (14)
Changes of the year (197) 299
Currency translation differences (1)  
Changes in scope of consolidation and non-controlling interest (9)  
Reversal to inventories adjustments (1)  
Reclassification adjustments (67) (36)
Balance (26) 249
Reserve for OCI on defined benefit plans    
Reserves within equity    
Balance (91) (88)
Changes of the year (9) 4
Currency translation differences   (2)
Changes in scope of consolidation and non-controlling interest 6  
Changes in scope of consolidation   (5)
Balance (94) (91)
Reserve for OCI on defined benefit plans | Gross reserve    
Reserves within equity    
Balance (121) (94)
Changes of the year (11) 8
Currency translation differences 1 (5)
Changes in scope of consolidation and non-controlling interest 8  
Changes in scope of consolidation   (30)
Balance (123) (121)
Reserve for OCI on defined benefit plans | Deferred tax liabilities, gross    
Reserves within equity    
Balance 30 6
Changes of the year 2 (4)
Currency translation differences (1) 3
Changes in scope of consolidation and non-controlling interest (2)  
Changes in scope of consolidation   25
Balance 29 30
Reserve for OCI on equity-accounted investments    
Reserves within equity    
Balance 28 98
Changes of the year 73 (70)
Changes in scope of consolidation and non-controlling interest (9)  
Balance 92 28
Reserve for OCI on equity-accounted investments | Defined Benefit Plans    
Reserves within equity    
OCI relating to equity-accounted investments 1 1
Reserve for OCI on Investments valued fair value    
Reserves within equity    
Balance 160 98
Changes of the year (32) 62
Currency translation differences (19)  
Changes in scope of consolidation and non-controlling interest (5)  
Balance € 104 € 160