Note 19 Reconciliation of taxation at the Spanish corporation tax rate to the tax expense recorded for the year (Details) - EUR (€) € in Millions |
12 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Tax effect of foreign tax rates reconciliation [Line Items] | |||||||||||||
| Profit (loss) before tax | € 16,227 | € 15,405 | [1] | € 12,419 | [1] | ||||||||
| Tax expense (income) | 5,100 | 4,830 | 4,003 | ||||||||||
| Amount of reconciliation [Member] | |||||||||||||
| Tax effect of foreign tax rates reconciliation [Line Items] | |||||||||||||
| Profit (loss) before tax | 16,227 | 15,405 | 12,419 | ||||||||||
| Profit (loss) before tax from continuing operations | 16,227 | 15,405 | 12,419 | ||||||||||
| Profit (loss) before tax from discountinued operations | 0 | 0 | 0 | ||||||||||
| Tax expense (income) at applicable tax rate | € 4,868 | € 4,622 | € 3,726 | ||||||||||
| Tax rate effect of foreign tax rates | [2] | 181.00% | 193.00% | 2.00% | |||||||||
| Revenues with lower tax rate | € (37) | € (44) | € (26) | ||||||||||
| Equity accounted earnings | (19) | (14) | (8) | ||||||||||
| Other effects of reconciliation of taxation | [3] | 107 | 73 | 309 | |||||||||
| Tax expense (income) | 5,100 | 4,830 | 4,003 | ||||||||||
| Tax expense (income) relating to profit or loss from ordinary activities of continuing operations | [4] | 5,100 | 4,830 | 4,003 | |||||||||
| Tax expense (income) relating to profit or loss from discontinuing operations | € 0 | € 0 | € 0 | ||||||||||
| MEXICO | Amount of reconciliation [Member] | |||||||||||||
| Tax effect of foreign tax rates reconciliation [Line Items] | |||||||||||||
| Tax rate effect of foreign tax rates | [2] | (135.00%) | (180.00%) | (194.00%) | |||||||||
| MEXICO | Effective tax percentage on reconcilation [Member] | |||||||||||||
| Tax effect of foreign tax rates reconciliation [Line Items] | |||||||||||||
| Tax rate effect of foreign tax rates | [2] | 28.00% | 28.00% | 27.00% | |||||||||
| CHILE | Amount of reconciliation [Member] | |||||||||||||
| Tax effect of foreign tax rates reconciliation [Line Items] | |||||||||||||
| Tax rate effect of foreign tax rates | [2] | (1.00%) | (2.00%) | (4.00%) | |||||||||
| CHILE | Effective tax percentage on reconcilation [Member] | |||||||||||||
| Tax effect of foreign tax rates reconciliation [Line Items] | |||||||||||||
| Tax rate effect of foreign tax rates | [2] | 29.00% | 23.00% | 11.00% | |||||||||
| COLOMBIA | Amount of reconciliation [Member] | |||||||||||||
| Tax effect of foreign tax rates reconciliation [Line Items] | |||||||||||||
| Tax rate effect of foreign tax rates | [2] | 18.00% | (1.00%) | (25.00%) | |||||||||
| COLOMBIA | Effective tax percentage on reconcilation [Member] | |||||||||||||
| Tax effect of foreign tax rates reconciliation [Line Items] | |||||||||||||
| Tax rate effect of foreign tax rates | [2] | 38.00% | 29.00% | 14.00% | |||||||||
| PERU | Amount of reconciliation [Member] | |||||||||||||
| Tax effect of foreign tax rates reconciliation [Line Items] | |||||||||||||
| Tax rate effect of foreign tax rates | [2] | (22.00%) | (44.00%) | (55.00%) | |||||||||
| PERU | Effective tax percentage on reconcilation [Member] | |||||||||||||
| Tax effect of foreign tax rates reconciliation [Line Items] | |||||||||||||
| Tax rate effect of foreign tax rates | [2] | 27.00% | 23.00% | 20.00% | |||||||||
| TURKEY | Amount of reconciliation [Member] | |||||||||||||
| Tax effect of foreign tax rates reconciliation [Line Items] | |||||||||||||
| Tax rate effect of foreign tax rates | [2] | 351.00% | 498.00% | 314.00% | |||||||||
| TURKEY | Effective tax percentage on reconcilation [Member] | |||||||||||||
| Tax effect of foreign tax rates reconciliation [Line Items] | |||||||||||||
| Tax rate effect of foreign tax rates | [2] | 51.00% | 62.00% | 57.00% | |||||||||
| UNITED STATES | Amount of reconciliation [Member] | |||||||||||||
| Tax effect of foreign tax rates reconciliation [Line Items] | |||||||||||||
| Tax rate effect of foreign tax rates | [2] | (50.00%) | (14.00%) | 5.00% | |||||||||
| UNITED STATES | Effective tax percentage on reconcilation [Member] | |||||||||||||
| Tax effect of foreign tax rates reconciliation [Line Items] | |||||||||||||
| Tax rate effect of foreign tax rates | [2] | 21.00% | 26.00% | 33.00% | |||||||||
| Other Countries [Member] | Amount of reconciliation [Member] | |||||||||||||
| Tax effect of foreign tax rates reconciliation [Line Items] | |||||||||||||
| Tax rate effect of foreign tax rates | [2] | 20.00% | (64.00%) | (39.00%) | |||||||||
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