v3.26.1
Non-current assets and disposal groups held for sale (Detail: Text Values) - EUR (€)
€ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2026
Dec. 31, 2025
Non current assets held for sale [Line Items]            
Non-current assets or disposal groups classified as held for sale € 2,700   € 2,700     € 35
Liabilities included in disposal groups classified as held for sale 1,600   1,600     0
Unrealized net gains (losses) arising during the period, before tax 0 € 0 0 € 0   0
Deposits 700,894   700,894     € 694,580
Provision for sale of disposal group            
Non current assets held for sale [Line Items]            
New provisions, other provisions 70          
Disposal groups classified as held for sale            
Non current assets held for sale [Line Items]            
Loans 2,700   2,700      
Deposits € 1,600   € 1,600      
Disposal groups classified as held for sale | Forecast            
Non current assets held for sale [Line Items]            
Gains (losses) on disposals of other non-current assets         € (100)