v3.26.1
Capital and financial risk management - Changes in assets and liabilities arising from financing activities (Details) - EUR (€)
€ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Changes in assets and liabilities arising from financing activities    
Balance at the beginning € 51,143 € 54,390
Cash Changes in Assets And Liabilities Arising From Financing Activities [Abstract]    
Proceeds from issuance of long-term borrowings 6,081 4,680
Repayment of borrowings (11,924) (12,963)
Net movement in short-term borrowings (502) 78
Net movement in derivatives 73 404
Interest paid (2,257) (2,705)
Purchase of treasury shares (2,041) (1,868)
Non-cash movements    
Fair value movements (14) (45)
Foreign exchange (367) 178
Interest costs 2,146 1,883
Lease additions 3,190 4,361
Acquisition of subsidiaries 4,209  
Other 1,984 2,750
Balance at the end 51,721 51,143
Total borrowings    
Changes in assets and liabilities arising from financing activities    
Balance at the beginning 53,143 56,987
Cash Changes in Assets And Liabilities Arising From Financing Activities [Abstract]    
Proceeds from issuance of long-term borrowings 6,081 4,680
Repayment of borrowings (11,924) (12,963)
Net movement in short-term borrowings (502) 78
Interest paid (2,227) (2,975)
Non-cash movements    
Foreign exchange (1,642) 121
Interest costs 2,324 2,196
Lease additions 3,190 4,361
Acquisition of subsidiaries 4,209  
Other (16) 658
Balance at the end 52,636 53,143
Derivative assets and liabilities    
Changes in assets and liabilities arising from financing activities    
Balance at the beginning (2,291) (2,702)
Cash Changes in Assets And Liabilities Arising From Financing Activities [Abstract]    
Net movement in derivatives 73 404
Interest paid 28 348
Non-cash movements    
Fair value movements (14) (45)
Foreign exchange 1,276 61
Interest costs (235) (356)
Other   (1)
Balance at the end (1,163) (2,291)
Financial liabilities under put options    
Changes in assets and liabilities arising from financing activities    
Balance at the beginning 97  
Cash Changes in Assets And Liabilities Arising From Financing Activities [Abstract]    
Interest paid 10 4
Non-cash movements    
Other   93
Balance at the end 107 97
Other liabilities    
Changes in assets and liabilities arising from financing activities    
Balance at the beginning 194 105
Cash Changes in Assets And Liabilities Arising From Financing Activities [Abstract]    
Interest paid (68) (82)
Purchase of treasury shares (2,041) (1,868)
Non-cash movements    
Foreign exchange (1) (4)
Interest costs 57 43
Other 2,000 2,000
Balance at the end € 141 € 194