v3.25.2
Fair value of assets and liabilities - Methods applied in determining fair values of financial assets and liabilities (carried at fair value) (Details) - EUR (€)
€ in Millions
Jun. 30, 2025
Dec. 31, 2024
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss € 152,486 € 137,580
Financial assets at fair value through other comprehensive income 49,846 46,389
Financial liabilities at fair value through profit or loss 93,524 86,900
–  Debt securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities at fair value through profit or loss 9,218 9,966
–  Deposits    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities at fair value through profit or loss 55,609 45,014
–  Trading securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities at fair value through profit or loss 3,671 3,653
- Derivatives    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities at fair value through profit or loss 25,026 28,267
Loans and receivables    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss 86,227 68,782
Financial assets at fair value through other comprehensive income 1,475 1,608
- Equity securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss 22,916 20,945
Financial assets at fair value through other comprehensive income 2,753 2,562
- Debt securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss 14,501 15,586
Debt securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through other comprehensive income 45,618 42,219
- Derivatives    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss 28,841 32,268
Level 1    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss 29,100 28,275
Financial assets at fair value through other comprehensive income 46,893 42,151
Financial liabilities at fair value through profit or loss 4,868 5,131
Level 1 | –  Debt securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities at fair value through profit or loss 1,398 1,455
Level 1 | –  Deposits    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities at fair value through profit or loss 0 0
Level 1 | –  Trading securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities at fair value through profit or loss 3,365 3,631
Level 1 | - Derivatives    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities at fair value through profit or loss 105 45
Level 1 | Loans and receivables    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss 0 0
Financial assets at fair value through other comprehensive income 0 0
Level 1 | - Equity securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss 22,767 20,789
Financial assets at fair value through other comprehensive income 2,470 2,292
Level 1 | - Debt securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss 6,259 7,485
Level 1 | Debt securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through other comprehensive income 44,423 39,859
Level 1 | - Derivatives    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss 74 1
Level 2    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss 112,228 98,571
Financial assets at fair value through other comprehensive income 2,513 3,967
Financial liabilities at fair value through profit or loss 88,043 80,998
Level 2 | –  Debt securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities at fair value through profit or loss 7,766 8,445
Level 2 | –  Deposits    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities at fair value through profit or loss 55,609 45,014
Level 2 | –  Trading securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities at fair value through profit or loss 297 12
Level 2 | - Derivatives    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities at fair value through profit or loss 24,371 27,528
Level 2 | Loans and receivables    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss 78,494 62,168
Financial assets at fair value through other comprehensive income 1,319 1,608
Level 2 | - Equity securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss 4 15
Financial assets at fair value through other comprehensive income 0 0
Level 2 | - Debt securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss 5,663 4,596
Level 2 | Debt securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through other comprehensive income 1,194 2,360
Level 2 | - Derivatives    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss 28,067 31,792
Level 3    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss 11,157 10,734
Financial assets at fair value through other comprehensive income 440 270
Financial liabilities at fair value through profit or loss 613 770
Level 3 | –  Debt securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities at fair value through profit or loss 53 67
Level 3 | –  Deposits    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities at fair value through profit or loss 0 0
Level 3 | –  Trading securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities at fair value through profit or loss 10 10
Level 3 | - Derivatives    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities at fair value through profit or loss 550 694
Level 3 | Loans and receivables    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss 7,733 6,614
Financial assets at fair value through other comprehensive income 156 0
Level 3 | - Equity securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss 145 141
Financial assets at fair value through other comprehensive income 283 270
Level 3 | - Debt securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss 2,579 3,505
Level 3 | Debt securities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through other comprehensive income 0 0
Level 3 | - Derivatives    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets at fair value through profit or loss € 700 € 475