v3.25.4
Note 18 Reconciliation Of Changes In Goodwill (Details) - EUR (€)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of reconciliation of changes in goodwill [line items]      
Goodwill at beginning of period € 700,000,000 € 795,000,000 € 707,000,000
Additional recognition, goodwill 0 0 0
Increase (decrease) through net exchange differences, goodwill 15,000,000 (95,000,000) 88,000,000
Impairment loss recognised in profit or loss, goodwill 0 0 0
Increase Decrease Through Companies In The Process Of Sale Goodwill 0 0 0
Goodwill at end of period 715,000,000 700,000,000 795,000,000
MEXICO      
Disclosure of reconciliation of changes in goodwill [line items]      
Goodwill at beginning of period 541,000,000 623,000,000 559,000,000
Additional recognition, goodwill 0 0 0
Increase (decrease) through net exchange differences, goodwill 11,000,000 (82,000,000) 64,000,000
Impairment loss recognised in profit or loss, goodwill 0 0 0
Increase Decrease Through Companies In The Process Of Sale Goodwill 0 0 0
Goodwill at end of period 553,000,000 541,000,000 623,000,000
COLOMBIA      
Disclosure of reconciliation of changes in goodwill [line items]      
Goodwill at beginning of period 132,000,000 143,000,000 118,000,000
Additional recognition, goodwill 0 0 0
Increase (decrease) through net exchange differences, goodwill 5,000,000 (11,000,000) 25,000,000
Impairment loss recognised in profit or loss, goodwill 0 0 0
Increase Decrease Through Companies In The Process Of Sale Goodwill 0 0 0
Goodwill at end of period 137,000,000 132,000,000 143,000,000
CHILE      
Disclosure of reconciliation of changes in goodwill [line items]      
Goodwill at beginning of period 23,000,000 24,000,000 25,000,000
Additional recognition, goodwill 0 0 0
Increase (decrease) through net exchange differences, goodwill (1,000,000) (1,000,000) (1,000,000)
Impairment loss recognised in profit or loss, goodwill 0 0 0
Increase Decrease Through Companies In The Process Of Sale Goodwill 0 0 0
Goodwill at end of period 22,000,000 23,000,000 24,000,000
Other Countries [Member]      
Disclosure of reconciliation of changes in goodwill [line items]      
Goodwill at beginning of period 4,000,000 5,000,000 5,000,000
Additional recognition, goodwill 0 0 0
Increase (decrease) through net exchange differences, goodwill 0 (1,000,000) 0
Impairment loss recognised in profit or loss, goodwill 0 0 0
Increase Decrease Through Companies In The Process Of Sale Goodwill 0 0 0
Goodwill at end of period € 4,000,000 € 4,000,000 € 5,000,000