v3.25.4
Condensed financial information of the parent company - Additional information (Details)
€ in Millions, $ in Millions
12 Months Ended
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2025
EUR (€)
Dec. 31, 2024
EUR (€)
Condensed Financial Statements, Captions [Line Items]          
Issue of contingent convertible capital securities $ 1,014 $ 982 $ 864    
Parent company          
Condensed Financial Statements, Captions [Line Items]          
Number of debentures held | €       € 25 € 10
Perpetual additional tier 1 contingent capital securities          
Condensed Financial Statements, Captions [Line Items]          
Issued capital $ 9,000 $ 8,750 $ 7,750