v3.25.4
Risk Report - Asset Quality - Financial Assets at amortized cost by Rating Class (Detail) - EUR (€)
€ in Millions
Dec. 31, 2025
Dec. 31, 2024
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount € 796,683 € 760,807
Allowance for credit losses 6,156 5,799
Total    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 796,683 760,807
Allowance for credit losses 6,156 5,799
iAAA–iAA    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 267,813 233,324
Allowance for credit losses 3 2
iA    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 118,886 112,351
Allowance for credit losses 12 11
iBBB    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 183,266 186,847
Allowance for credit losses 70 66
iBB    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 162,582 160,901
Allowance for credit losses 454 358
iB    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 41,721 44,782
Allowance for credit losses 478 466
iCCC and below    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 22,415 22,603
Allowance for credit losses 5,138 4,896
Stage 1    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 727,810 681,147
Allowance for credit losses 421 438
Stage 1 | Total    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 727,810 681,147
Allowance for credit losses 421 438
Stage 1 | iAAA–iAA    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 267,161 226,138
Allowance for credit losses 2 2
Stage 1 | iA    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 118,048 110,279
Allowance for credit losses 10 10
Stage 1 | iBBB    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 179,141 179,697
Allowance for credit losses 60 54
Stage 1 | iBB    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 143,684 140,755
Allowance for credit losses 246 246
Stage 1 | iB    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 19,776 23,090
Allowance for credit losses 100 115
Stage 1 | iCCC and below    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 0 1,188
Allowance for credit losses 3 11
Stage 2    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 53,383 63,836
Allowance for credit losses 888 736
Stage 2 | Total    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 53,383 63,836
Allowance for credit losses 888 736
Stage 2 | iAAA–iAA    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 653 7,186
Allowance for credit losses 1 0
Stage 2 | iA    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 828 2,061
Allowance for credit losses 3 1
Stage 2 | iBBB    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 4,125 7,150
Allowance for credit losses 10 12
Stage 2 | iBB    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 18,896 20,146
Allowance for credit losses 208 111
Stage 2 | iB    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 21,945 21,692
Allowance for credit losses 378 351
Stage 2 | iCCC and below    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 6,937 5,601
Allowance for credit losses 289 260
Stage 3    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 14,874 15,214
Allowance for credit losses 4,600 4,412
Stage 3 | Total    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 14,874 15,214
Allowance for credit losses 4,600 4,412
Stage 3 | iAAA–iAA    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 0 0
Allowance for credit losses 0 0
Stage 3 | iA    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 0 0
Allowance for credit losses 0 0
Stage 3 | iBBB    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 0 0
Allowance for credit losses 0 0
Stage 3 | iBB    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 0 0
Allowance for credit losses 0 0
Stage 3 | iB    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 0 0
Allowance for credit losses 0 0
Stage 3 | iCCC and below    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 14,874 15,214
Allowance for credit losses 4,600 4,412
Stage 3 POCI    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 615 609
Allowance for credit losses 247 213
Stage 3 POCI | Total    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 615 609
Allowance for credit losses 247 213
Stage 3 POCI | iAAA–iAA    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 0 0
Allowance for credit losses 0 0
Stage 3 POCI | iA    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 10 10
Allowance for credit losses 0 0
Stage 3 POCI | iBBB    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 0 0
Allowance for credit losses 0 0
Stage 3 POCI | iBB    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 1 0
Allowance for credit losses 0 0
Stage 3 POCI | iB    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 0 0
Allowance for credit losses 0 0
Stage 3 POCI | iCCC and below    
Credit Risk Exposure and Risk Concentrations/ Amortized Cost [Line Items]    
Gross carrying amount 604 599
Allowance for credit losses € 247 € 213