v3.25.4
Property and equipment - Schedule of changes in property in own use (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January € 2,434 € 2,399
Additions 510 473
Transfers (3) 1
Depreciation (442) (457)
Impairments (16) (23)
Reversal of impairments 7 5
Remeasurements 56 80
Disposals (48) (68)
Exchange rate differences (18) 25
Closing balance 2,478 2,434
Gross carrying amount    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January 5,831  
Closing balance 5,803 5,831
Accumulated depreciation    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January (3,772)  
Closing balance (3,712) (3,772)
Accumulated impairments    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January (136)  
Closing balance (134) (136)
Accumulated revaluation surplus    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January 282  
Closing balance 264 282
Accumulated remeasurement    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January 229  
Closing balance 258 229
Right-of-use assets    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January 1,033 1,078
Additions 160 141
Transfers (4)
Depreciation (237) (242)
Impairments (3) (4)
Reversal of impairments
Remeasurements 40 75
Disposals (10) (18)
Exchange rate differences (12) 8
Closing balance 972 1,033
Right-of-use assets | Gross carrying amount    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January 1,933  
Closing balance 1,982 1,933
Right-of-use assets | Accumulated depreciation    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January (1,098)  
Closing balance (1,237) (1,098)
Right-of-use assets | Accumulated impairments    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January (31)  
Closing balance (31) (31)
Right-of-use assets | Accumulated revaluation surplus    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January  
Closing balance
Right-of-use assets | Accumulated remeasurement    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January 229  
Closing balance 258 229
Property in own use | Gross carrying amount    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January 871  
Closing balance 994 871
Property in own use | Property in own use and Equipment    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January 758 616
Additions 147 92
Transfers (15) 83
Depreciation (11) (11)
Impairments (8) (9)
Reversal of impairments 6 5
Remeasurements 15 5
Disposals (28) (36)
Exchange rate differences (3) 13
Closing balance 863 758
Property in own use | Property in own use and Equipment | Gross carrying amount    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January 871  
Closing balance 994 871
Property in own use | Property in own use and Equipment | Accumulated depreciation    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January (298)  
Closing balance (299) (298)
Property in own use | Property in own use and Equipment | Accumulated impairments    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January (97)  
Closing balance (95) (97)
Property in own use | Property in own use and Equipment | Accumulated revaluation surplus    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January 282  
Closing balance 264 282
Property in own use | Property in own use and Equipment | Accumulated remeasurement    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January  
Closing balance
Property in own use | Right-of-use assets    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January 895  
Closing balance 837 895
Equipment | Property in own use and Equipment    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January 643 705
Additions 203 240
Transfers 11 (78)
Depreciation (194) (204)
Impairments (6) (10)
Reversal of impairments
Remeasurements
Disposals (11) (14)
Exchange rate differences (3) 5
Closing balance 644 643
Equipment | Property in own use and Equipment | Gross carrying amount    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January 3,027  
Closing balance 2,827 3,027
Equipment | Property in own use and Equipment | Accumulated depreciation    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January (2,376)  
Closing balance (2,176) (2,376)
Equipment | Property in own use and Equipment | Accumulated impairments    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January (8)  
Closing balance (7) (8)
Equipment | Property in own use and Equipment | Accumulated revaluation surplus    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January  
Closing balance
Equipment | Property in own use and Equipment | Accumulated remeasurement    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Opening balance as at 1 January  
Closing balance