v3.25.1
Property, plant and equipment - Right-of-use assets (Details) - EUR (€)
€ in Millions
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Noncurrent Assets or Disposal Groups Classified as Held for Sale [Line Items]      
Property, plant and equipment (owned assets) € 20,402 € 19,399  
Right-of-use assets 10,310 9,100  
Total property, plant and equipment 30,712 28,499 € 37,992
Additions to right-of-use assets 4,656 3,103 € 7,387
Depreciation, right-of-use assets 3,235 4,108  
Aggregate continuing and discontinued operations      
Noncurrent Assets or Disposal Groups Classified as Held for Sale [Line Items]      
Additions to right-of-use assets 4,656 4,173  
Discontinued Operations      
Noncurrent Assets or Disposal Groups Classified as Held for Sale [Line Items]      
Depreciation, right-of-use assets € 0 € 1,091