v3.25.1
Capital and financial risk management - Net financial instruments - Derivative financial assets (Details) - EUR (€)
€ in Millions
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Net financial assets subject to offsetting, enforceable master netting arrangements or similar agreements    
Gross amount € 2,291 € 2,702
Amounts presented in balance sheet 2,291 2,702
Cash collateral (1,347) (1,887)
Net amount 944 815
Collateral pledged as initial margin that does not offset against existing mark to market balances 613 370
Derivative financial liabilities    
Net financial assets subject to offsetting, enforceable master netting arrangements or similar agreements    
Derivative financial liabilities, Gross amount (1,906) (1,524)
Derivative financial liabilities, Amounts presented in balance sheet (1,906) (1,524)
Derivative financial liabilities, Right of set off with derivative counterparties 1,146 899
Derivative financial liabilities, Cash collateral 1,010 741
Derivative financial liabilities, Net amount 250 116
Derivative financial assets    
Net financial assets subject to offsetting, enforceable master netting arrangements or similar agreements    
Derivative financial assets, Gross amount 4,197 4,226
Derivative financial assets, Amounts presented in balance sheet 4,197 4,226
Derivative financial assets, Right of set off with derivative counterparties (1,146) (899)
Derivative financial assets, Cash collateral (2,357) (2,628)
Derivative financial assets, Net amount € 694 € 699