v3.26.1
Related Party Transactions - Transactions with Subsidiaries, Joint Ventures and Associates - Loans Issued and Guarantees Granted (Detail) - EUR (€)
€ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Related party transactions [abstract]    
Loans outstanding, beginning of period € 66 [1] € 73
Net movement in loans during the period 0 (7)
Changes in the group of consolidated companies 0 0
Exchange rate changes/other 0 0
Loans outstanding, end of period [1] 66 66
Other credit risk related transactions:    
Allowance for loan losses 0 0
Provision for loan losses 0 0
Guarantees and commitments € 3 € 3
[1] Loans past due were € 0 million as of June 30, 2026, and € 0 million as of December 31, 2025. For the total loans, the Group held collateral of € 0 million and € 0 million as
of June 30, 2026, and December 31, 2025, respectively