v3.26.1
Financial Risk Management Objectives and Policies - Schedule of Undiscounted Cash Flows of the Non-Derivative Financial Liabilities (Detail) - EUR (€)
€ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of maturity analysis for non-derivative financial liabilities [line items]    
Borrowings € 6,360 € 4,555
Future interest commitments 1,564 1,350
Trade and other payables 973 663
Other long-term liabilities 36 56
Lease liabilities 792 55
Fixed assets suppliers 443 610
Total maturity profile 10,168 7,289
Within 1 year [member]    
Disclosure of maturity analysis for non-derivative financial liabilities [line items]    
Borrowings 803 273
Future interest commitments 214 160
Trade and other payables 973 663
Other long-term liabilities 0 0
Lease liabilities 110 19
Fixed assets suppliers 279 184
Total maturity profile 2,264 1,299
Between 1 and 5 years [member]    
Disclosure of maturity analysis for non-derivative financial liabilities [line items]    
Borrowings 3,569 2,509
Future interest commitments 853 552
Other long-term liabilities 36 56
Lease liabilities 412 28
Fixed assets suppliers 164 426
Total maturity profile 5,149 3,571
After 5 years [member]    
Disclosure of maturity analysis for non-derivative financial liabilities [line items]    
Borrowings 1,988 1,773
Future interest commitments 497 638
Lease liabilities 270 8
Fixed assets suppliers 0 0
Total maturity profile € 2,755 € 2,419