v3.25.4
Derivatives - Cash Flow Hedge Balances (Detail) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]      
Reported in Equity [1] € (49) € 36 € 44
thereof relates to terminated programs 0 0 0
Gains (losses) posted to equity for the year ended (42) (242) 436
Gains (losses) removed from equity for the year ended (44) 234 398
thereof relates to terminated programs 0 0 0
Changes of hedged item's value used for hedge effectiveness (40) (212) 434
Cash flow hedges      
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]      
Ineffectiveness recorded within P&L € (8) € 13 € 101
[1] 1Reported in equity refers to accumulated other comprehensive income as presented in the Consolidated Balance Sheet.