v3.25.4
Note 25 Post employment commitments (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of net defined benefit liability (asset) [line items]      
Net liability asset € 5,683 € 6,424  
Defined benefit obligation, at present value 6,247 5,683 € 6,424
SPAIN      
Disclosure of net defined benefit liability (asset) [line items]      
Net liability asset 2,078    
Defined benefit obligation, at present value 1,770 2,078  
Plan assets 114    
Plan assets 96 114  
Net liability asset 1,674 1,964 2,181
Net liability asset 1,964 2,181 2,399
SPAIN | Current service cost [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 4    
Plan assets changes of the year 0    
Net liability asset changes of the year 4 4 3
SPAIN | Interest income or expense [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 61    
Plan assets changes of the year 3    
Net liability asset changes of the year 58 69 85
SPAIN | Contributions by plan participants [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 0
SPAIN | Employer contributions [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 0
SPAIN | Past service cost [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value [1] 0    
Plan assets changes of the year [1] 0    
Net liability asset changes of the year 0 [1] 0 [2] 0 [2]
SPAIN | Remeasurements [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value (104)    
Plan assets changes of the year (5)    
Net liability asset changes of the year (99) 23 67
SPAIN | Return of plan assets [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value [3] 0    
Plan assets changes of the year [3] (5)    
Net liability asset changes of the year 5 [3] (1) [4] 0 [4]
SPAIN | From changes in demographic assumptions [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 0
SPAIN | From changes in financial assumptions [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value (91)    
Plan assets changes of the year 0    
Net liability asset changes of the year (91) 34 78
SPAIN | Other actuarial gains and losses [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value (13)    
Plan assets changes of the year 0    
Net liability asset changes of the year (13) (10) (11)
SPAIN | Benefit payments [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value (275)    
Plan assets changes of the year (16)    
Net liability asset changes of the year (259) (321) (379)
SPAIN | Settlements payments [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 0
SPAIN | Total for all business combinations [member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 0
SPAIN | Effect on changes in foreign exchange rates [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 0
SPAIN | Conversions to defined contributions [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 0
SPAIN | Other effects Post employment commitments [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 6    
Plan assets changes of the year 0    
Net liability asset changes of the year 6 8 6
SPAIN | of which vested benefit obligation relating to current employees [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation, at present value 72    
SPAIN | Of which vested benefit obligation relating to retired employees [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation, at present value 1,698    
MEXICO      
Disclosure of net defined benefit liability (asset) [line items]      
Net liability asset 1,125    
Defined benefit obligation, at present value 1,522 1,125  
Plan assets 748    
Plan assets 986 748  
Net liability asset 536 377 311
Net liability asset 377 311 132
MEXICO | Current service cost [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 9    
Plan assets changes of the year 0    
Net liability asset changes of the year 9 10 9
MEXICO | Interest income or expense [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 126    
Plan assets changes of the year 81    
Net liability asset changes of the year 45 30 17
MEXICO | Contributions by plan participants [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 0
MEXICO | Employer contributions [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 185    
Net liability asset changes of the year (185) (68) (37)
MEXICO | Past service cost [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value [1] 0    
Plan assets changes of the year [1] 0    
Net liability asset changes of the year 0 [1] 0 [2] 0 [2]
MEXICO | Remeasurements [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 374    
Plan assets changes of the year 93    
Net liability asset changes of the year 281 139 175
MEXICO | Return of plan assets [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value [3] 0    
Plan assets changes of the year [3] 93    
Net liability asset changes of the year (93) [3] 125 [4] 19 [4]
MEXICO | From changes in demographic assumptions [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 2 0
MEXICO | From changes in financial assumptions [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 344    
Plan assets changes of the year 0    
Net liability asset changes of the year 344 (10) 114
MEXICO | Other actuarial gains and losses [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 30    
Plan assets changes of the year 0    
Net liability asset changes of the year 30 22 42
MEXICO | Benefit payments [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value (138)    
Plan assets changes of the year (138)    
Net liability asset changes of the year 0 0 0
MEXICO | Settlements payments [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 0
MEXICO | Total for all business combinations [member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 0
MEXICO | Effect on changes in foreign exchange rates [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 26    
Plan assets changes of the year 18    
Net liability asset changes of the year 8 (45) 15
MEXICO | Conversions to defined contributions [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 0
MEXICO | Other effects Post employment commitments [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 0
TURKEY      
Disclosure of net defined benefit liability (asset) [line items]      
Net liability asset 567    
Defined benefit obligation, at present value 675 567  
Plan assets 488    
Plan assets 599 488  
Net liability asset 77 80 72
Net liability asset 80 72 103
TURKEY | Current service cost [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 16    
Plan assets changes of the year 0    
Net liability asset changes of the year 16 18 17
TURKEY | Interest income or expense [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 133    
Plan assets changes of the year 116    
Net liability asset changes of the year 17 16 8
TURKEY | Contributions by plan participants [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 13    
Plan assets changes of the year 13    
Net liability asset changes of the year 0 0 0
TURKEY | Employer contributions [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 37    
Net liability asset changes of the year (37) (39) (23)
TURKEY | Past service cost [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value [1] 4    
Plan assets changes of the year [1] 0    
Net liability asset changes of the year 4 [1] 3 [2] 33 [2]
TURKEY | Remeasurements [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 141    
Plan assets changes of the year 110    
Net liability asset changes of the year 31 32 32
TURKEY | Return of plan assets [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value [3] 0    
Plan assets changes of the year [3] 110    
Net liability asset changes of the year (110) [3] (50) [4] (129) [4]
TURKEY | From changes in demographic assumptions [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 21    
Plan assets changes of the year 0    
Net liability asset changes of the year 21 (15) (14)
TURKEY | From changes in financial assumptions [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 22    
Plan assets changes of the year 0    
Net liability asset changes of the year 22 (97) 10
TURKEY | Other actuarial gains and losses [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 97    
Plan assets changes of the year 0    
Net liability asset changes of the year 97 195 165
TURKEY | Benefit payments [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value (34)    
Plan assets changes of the year (24)    
Net liability asset changes of the year (11) (11) (43)
TURKEY | Settlements payments [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 0
TURKEY | Total for all business combinations [member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 0
TURKEY | Effect on changes in foreign exchange rates [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value (155)    
Plan assets changes of the year (133)    
Net liability asset changes of the year (22) (8) (40)
TURKEY | Conversions to defined contributions [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 0
TURKEY | Other effects Post employment commitments [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value (10)    
Plan assets changes of the year (7)    
Net liability asset changes of the year (2) (4) (14)
Rest of the world [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Net liability asset 260    
Defined benefit obligation, at present value 246 260  
Plan assets 234    
Plan assets 223 234  
Net liability asset 23 26 23
Net liability asset 26 23 25
Rest of the world [Member] | Current service cost [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 3    
Plan assets changes of the year 0    
Net liability asset changes of the year 3 3 3
Rest of the world [Member] | Interest income or expense [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 9    
Plan assets changes of the year 8    
Net liability asset changes of the year 1 2 2
Rest of the world [Member] | Contributions by plan participants [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 2    
Plan assets changes of the year 2    
Net liability asset changes of the year 0 0 0
Rest of the world [Member] | Employer contributions [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 2    
Net liability asset changes of the year (2) (22) (29)
Rest of the world [Member] | Past service cost [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value [1] 2    
Plan assets changes of the year [1] 0    
Net liability asset changes of the year 2 [1] 4 [2] 3 [2]
Rest of the world [Member] | Remeasurements [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value (17)    
Plan assets changes of the year (12)    
Net liability asset changes of the year (5) 19 21
Rest of the world [Member] | Return of plan assets [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value [3] 0    
Plan assets changes of the year [3] (12)    
Net liability asset changes of the year 12 [3] 10 [4] 25 [4]
Rest of the world [Member] | From changes in demographic assumptions [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 (2)
Rest of the world [Member] | From changes in financial assumptions [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value (22)    
Plan assets changes of the year 0    
Net liability asset changes of the year (22) 3 (10)
Rest of the world [Member] | Other actuarial gains and losses [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 5    
Plan assets changes of the year 0    
Net liability asset changes of the year 5 6 8
Rest of the world [Member] | Benefit payments [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value (12)    
Plan assets changes of the year (11)    
Net liability asset changes of the year (1) (1) (1)
Rest of the world [Member] | Settlements payments [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 (1)
Rest of the world [Member] | Total for all business combinations [member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 (1)
Rest of the world [Member] | Effect on changes in foreign exchange rates [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value (1)    
Plan assets changes of the year 0    
Net liability asset changes of the year (1) (2) 1
Rest of the world [Member] | Conversions to defined contributions [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year 0 0 0
Rest of the world [Member] | Other effects Post employment commitments [Member]      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligation at present value 0    
Plan assets changes of the year 0    
Net liability asset changes of the year € 0 € 0 € 0
[1]
(1) Including gains and losses arising from settlements.
[2]
(1) Includes gains and losses from settlements.
[3]
(2) Excluding interest, which is recorded under "Interest income or expense".
[4]
(2) Excludes interest which is reflected in the line item “Interest income and expense”.