v3.26.1
Financial instruments - Fair values and risk management - Guarantees (Details) - EUR (€)
€ in Millions
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Subsidiaries | Letters of guarantee      
Disclosure of transactions between related parties [line items]      
Letters of guarantee € 1,560 € 2,690 € 2,760