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Note 19 - Tax assets and liabilities - Secured tax assets (Details) - EUR (€) € in Millions | Dec. 31, 2018 | Dec. 31, 2017 | [1] | Dec. 31, 2016 | [1]
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Pensions [Member] |  |  |
Secured Tax Assets Line Items |  |  |
Secured Tax Assets deferred taxes | € 1,874 | € 1,897 | € 1,901
Impairment Losses [Member] |  |  |
Secured Tax Assets Line Items |  |  |
Secured Tax Assets deferred taxes | 7,489 | 7,536 | 7,530
Total [Member] |  |  |
Secured Tax Assets Line Items |  |  |
Secured Tax Assets deferred taxes | € 9,363 | € 9,433 | € 9,431
[1] | (*) In 2017 and 2016 guaranteed deferred tax assets also existed in Portugal but in 2018 they lost the guarantee.

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- References No definition available. + Details
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- Definition The amount of Secured Tax Assets deferred taxes + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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- Details
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- Details
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