v3.25.4
Note 25 Estimated benefit payments (Details)
€ in Millions
 12 Months Ended
Dec. 31, 2025
EUR (€)
Not later than one year [member]  
Estimated benefit payments [Line Items]  
Estimated benefit payments € 639
Not later than one year [member] | SPAIN  
Estimated benefit payments [Line Items]  
Estimated benefit payments 380
Not later than one year [member] | MEXICO  
Estimated benefit payments [Line Items]  
Estimated benefit payments 229
Not later than one year [member] | TURKEY  
Estimated benefit payments [Line Items]  
Estimated benefit payments 30
Later than one year and not later than two years [member]  
Estimated benefit payments [Line Items]  
Estimated benefit payments 522
Later than one year and not later than two years [member] | SPAIN  
Estimated benefit payments [Line Items]  
Estimated benefit payments 240
Later than one year and not later than two years [member] | MEXICO  
Estimated benefit payments [Line Items]  
Estimated benefit payments 246
Later than one year and not later than two years [member] | TURKEY  
Estimated benefit payments [Line Items]  
Estimated benefit payments 36
Later than two years and not later than three years [member]  
Estimated benefit payments [Line Items]  
Estimated benefit payments 516
Later than two years and not later than three years [member] | SPAIN  
Estimated benefit payments [Line Items]  
Estimated benefit payments 209
Later than two years and not later than three years [member] | MEXICO  
Estimated benefit payments [Line Items]  
Estimated benefit payments 261
Later than two years and not later than three years [member] | TURKEY  
Estimated benefit payments [Line Items]  
Estimated benefit payments 46
Later than three years and not later than four years [member]  
Estimated benefit payments [Line Items]  
Estimated benefit payments 516
Later than three years and not later than four years [member] | SPAIN  
Estimated benefit payments [Line Items]  
Estimated benefit payments 180
Later than three years and not later than four years [member] | MEXICO  
Estimated benefit payments [Line Items]  
Estimated benefit payments 278
Later than three years and not later than four years [member] | TURKEY  
Estimated benefit payments [Line Items]  
Estimated benefit payments 58
Later than four years and not later than five years [member]  
Estimated benefit payments [Line Items]  
Estimated benefit payments 525
Later than four years and not later than five years [member] | SPAIN  
Estimated benefit payments [Line Items]  
Estimated benefit payments 153
Later than four years and not later than five years [member] | MEXICO  
Estimated benefit payments [Line Items]  
Estimated benefit payments 297
Later than four years and not later than five years [member] | TURKEY  
Estimated benefit payments [Line Items]  
Estimated benefit payments 75
Later than five years and not later than ten years [member]  
Estimated benefit payments [Line Items]  
Estimated benefit payments 3,087
Later than five years and not later than ten years [member] | SPAIN  
Estimated benefit payments [Line Items]  
Estimated benefit payments 557
Later than five years and not later than ten years [member] | MEXICO  
Estimated benefit payments [Line Items]  
Estimated benefit payments 1,635
Later than five years and not later than ten years [member] | TURKEY  
Estimated benefit payments [Line Items]  
Estimated benefit payments € 895