v3.26.1
Financial instruments - Fair values and risk management - Financial liabilities (Details) - EUR (€)
€ in Millions
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Disclosure of financial liabilities [line items]      
Financial liabilities € 4,473.0 € 5,565.4 € 5,324.2
Current derivative financial liabilities 142.3 224.7 178.8
Not measured at fair value in statement of financial position but for which fair value is disclosed      
Disclosure of financial liabilities [line items]      
Total Fair Value 1,344.2 2,511.7 2,510.3
Financial instruments for which fair value is disclosed      
Disclosure of financial liabilities [line items]      
Total Fair Value 1,494.3 2,738.9 2,692.4
Liabilities at Amortised Cost      
Disclosure of financial liabilities [line items]      
Financial liabilities 4,322.9 5,338.2 5,142.1
Cash-Flow Hedges      
Disclosure of financial liabilities [line items]      
Financial liabilities 150.1 227.2 182.1
Current maturities of debt      
Disclosure of financial liabilities [line items]      
Financial liabilities 1,198.8 848.4 50.0
Current maturities of debt | Financial instruments for which fair value is disclosed      
Disclosure of financial liabilities [line items]      
Total Fair Value 1,196.4 850.3 50.0
Current maturities of debt | Liabilities at Amortised Cost      
Disclosure of financial liabilities [line items]      
Financial liabilities 1,198.8 848.4 50.0
Non-current maturities of debt      
Disclosure of financial liabilities [line items]      
Financial liabilities 147.8 1,685.2 2,532.2
Non-current maturities of debt | Not measured at fair value in statement of financial position but for which fair value is disclosed      
Disclosure of financial liabilities [line items]      
Total Fair Value 1,344.2 2,511.7 2,510.3
Non-current maturities of debt | Financial instruments for which fair value is disclosed      
Disclosure of financial liabilities [line items]      
Total Fair Value 147.8 1,661.4 2,460.3
Non-current maturities of debt | Liabilities at Amortised Cost      
Disclosure of financial liabilities [line items]      
Financial liabilities 147.8 1,685.2 2,532.2
Foriegn currency forward contracts      
Disclosure of financial liabilities [line items]      
Financial liabilities 79.6 2.7 3.3
Foriegn currency forward contracts | Financial instruments for which fair value is disclosed      
Disclosure of financial liabilities [line items]      
Total Fair Value 79.6 2.7 3.3
Foriegn currency forward contracts | Cash-Flow Hedges      
Disclosure of financial liabilities [line items]      
Financial liabilities 79.6 2.7 3.3
Commodity forward contracts      
Disclosure of financial liabilities [line items]      
Financial liabilities 70.5 224.5 178.8
Jet fuel and carbon derivative contracts      
Disclosure of financial liabilities [line items]      
Financial liabilities 70.5 224.5 178.8
Jet fuel and carbon derivative contracts | Financial instruments for which fair value is disclosed      
Disclosure of financial liabilities [line items]      
Total Fair Value 70.5 224.5 178.8
Jet fuel and carbon derivative contracts | Cash-Flow Hedges      
Disclosure of financial liabilities [line items]      
Financial liabilities 70.5 224.5 178.8
Trade payables      
Disclosure of financial liabilities [line items]      
Financial liabilities 609.8 702.0 792.2
Trade payables | Liabilities at Amortised Cost      
Disclosure of financial liabilities [line items]      
Financial liabilities     792.2
Trade payables (Current)      
Disclosure of financial liabilities [line items]      
Financial liabilities 609.8 702.0  
Trade payables (Current) | Liabilities at Amortised Cost      
Disclosure of financial liabilities [line items]      
Financial liabilities 609.8 702.0  
Accrued expenses      
Disclosure of financial liabilities [line items]      
Financial liabilities 2,221.6 1,953.5 1,603.1
Accrued expenses | Liabilities at Amortised Cost      
Disclosure of financial liabilities [line items]      
Financial liabilities 2,221.6 1,953.5 1,603.1
Lease liabilities - right of use      
Disclosure of financial liabilities [line items]      
Financial liabilities 144.9 149.1 164.6
Lease liabilities - right of use | Liabilities at Amortised Cost      
Disclosure of financial liabilities [line items]      
Financial liabilities € 144.9 € 149.1 € 164.6