v3.25.4
Note 7 Changes in gross accounting balances of loans and advances at amortized cost (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Changes in gross accounting balances and allowances of loans and advances at amortized cost [Line Items]      
Gross carrying amount loans and advances at amortized cost € 455,016 € 413,585  
Gross carrying amount loans and advances at amortized cost 507,842 455,016 € 413,585
Changes in gross accounting balances of loans and advances at amortized cost [Member]      
Changes in gross accounting balances and allowances of loans and advances at amortized cost [Line Items]      
Gross carrying amount loans and advances at amortized cost 455,016 413,585 389,073
Transfers of financial assets 0 0 0
Transfers from stage 1 to stage 2 0 0 0
Transfers from stage 2 to stage 1 0 0 0
Transfers to stage 3 0 0 0
Transfers from stage 3 0 0 0
Net annual origination of financial assets 70,335 58,952 31,764
Becoming write offs (4,165) (3,594) (3,150)
Methodological changes and adoption of new standards 0    
Net foreign exchange loss (12,996) (15,203) (3,838)
Increase (decrease) through other movements, financial assets 290 144 401
Other impairment losses (124) 1,131 (665)
Gross carrying amount loans and advances at amortized cost 508,355 455,016 413,585
Stage 1 [Member] | Changes in gross accounting balances of loans and advances at amortized cost [Member]      
Changes in gross accounting balances and allowances of loans and advances at amortized cost [Line Items]      
Gross carrying amount loans and advances at amortized cost 409,023 361,186 341,944
Transfers of financial assets (6,114) (4,032) (11,647)
Transfers from stage 1 to stage 2 (11,473) (11,840) (18,172)
Transfers from stage 2 to stage 1 6,746 9,830 7,639
Transfers to stage 3 (2,784) (3,260) (3,203)
Transfers from stage 3 1,397 1,238 2,089
Net annual origination of financial assets 71,144 64,222 34,334
Becoming write offs (428) (333) (186)
Methodological changes and adoption of new standards 0    
Net foreign exchange loss (11,291) (13,508) (2,833)
Increase (decrease) through other movements, financial assets (23) 29 (60)
Other impairment losses 450 1,460 (365)
Gross carrying amount loans and advances at amortized cost 462,761 409,023 361,186
Stage 2 [Member] | Changes in gross accounting balances of loans and advances at amortized cost [Member]      
Changes in gross accounting balances and allowances of loans and advances at amortized cost [Line Items]      
Gross carrying amount loans and advances at amortized cost 31,780 37,953 33,636
Transfers of financial assets 4,337 1,625 10,463
Transfers from stage 1 to stage 2 11,473 11,840 18,172
Transfers from stage 2 to stage 1 (6,746) (9,830) (7,639)
Transfers to stage 3 (1,704) (1,949) (2,297)
Transfers from stage 3 1,314 1,564 2,226
Net annual origination of financial assets (2,835) (6,378) (5,233)
Becoming write offs (104) (112) (76)
Methodological changes and adoption of new standards 0    
Net foreign exchange loss (1,310) (1,137) (635)
Increase (decrease) through other movements, financial assets 133 78 (16)
Other impairment losses (754) (250) (187)
Gross carrying amount loans and advances at amortized cost 31,248 31,780 37,953
Stage 3 [Member] | Changes in gross accounting balances of loans and advances at amortized cost [Member]      
Changes in gross accounting balances and allowances of loans and advances at amortized cost [Line Items]      
Gross carrying amount loans and advances at amortized cost 14,213 14,446 13,493
Transfers of financial assets 1,777 2,407 1,184
Transfers from stage 1 to stage 2 0 0 0
Transfers from stage 2 to stage 1 0 0 0
Transfers to stage 3 4,488 5,208 5,500
Transfers from stage 3 (2,711) (2,801) (4,316)
Net annual origination of financial assets 2,025 1,108 2,663
Becoming write offs (3,634) (3,149) (2,889)
Methodological changes and adoption of new standards 0    
Net foreign exchange loss (394) (557) (369)
Increase (decrease) through other movements, financial assets 180 36 476
Other impairment losses 180 (78) (112)
Gross carrying amount loans and advances at amortized cost € 14,346 € 14,213 € 14,446