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Note 19 - Tax assets and liabilities - Deferred tax assets by Country (Details) - EUR (€) € in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Deferred tax assets by county Line Items |  |  |
Net Deferred tax assets unsecured | € 3,108 | € 3,568 | € 2,924
Percentage of temporary differences in Mexico | 98,24% |  |
Deductible temporary differences mainly originated by Catalunya Bank | € 2,284 |  |
Spain [Member] |  |  |
Deferred tax assets by county Line Items |  |  |
Net Deferred tax assets unsecured | 2,052 | 2,007 | 1,437
Spain [Member] | Credit for tax loss [Member] |  |  |
Deferred tax assets by county Line Items |  |  |
Net Deferred tax assets unsecured | 1,184 |  |
Spain [Member] | Temporary Differences |  |  |
Deferred tax assets by county Line Items |  |  |
Net Deferred tax assets unsecured | 868 |  |
Mexico [Member] |  |  |
Deferred tax assets by county Line Items |  |  |
Net Deferred tax assets unsecured | 615 | 698 | 608
South America [Member] |  |  |
Deferred tax assets by county Line Items |  |  |
Net Deferred tax assets unsecured | 26 | 362 | 330
South America [Member] | Temporary Differences |  |  |
Deferred tax assets by county Line Items |  |  |
Net Deferred tax assets unsecured | 26 |  |
United States [Member] |  |  |
Deferred tax assets by county Line Items |  |  |
Net Deferred tax assets unsecured | 180 | 345 | 300
United States [Member] | Temporary Differences |  |  |
Deferred tax assets by county Line Items |  |  |
Net Deferred tax assets unsecured | 180 |  |
Turkey [Member] |  |  |
Deferred tax assets by county Line Items |  |  |
Net Deferred tax assets unsecured | 224 | € 135 | € 217
Turkey [Member] | Credit for tax loss [Member] |  |  |
Deferred tax assets by county Line Items |  |  |
Net Deferred tax assets unsecured | 13 |  |
Turkey [Member] | Temporary Differences |  |  |
Deferred tax assets by county Line Items |  |  |
Net Deferred tax assets unsecured | € 211 |  |

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- Definition Deductible Temporary Differences originated by Catalunya Bank. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of unsecured Deferred tax assets. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition The Percentage of temporary differences that come from Mexico. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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Period Type: |