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Note 19 - Tax assets and liabilities - Secured tax assets (Details) - EUR (€) | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | [1]
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Pensions [Member] |  |  |
Secured Tax Assets Line Items |  |  |
Secured Tax Assets deferred taxes | € 1,924,000,000 | € 1,924,000,000 | € 1,947,000,000
Impairment Losses [Member] |  |  |
Secured Tax Assets Line Items |  |  |
Secured Tax Assets deferred taxes | 7,439,000,000 | 7,439,000,000 | 7,486,000,000
Total Member |  |  |
Secured Tax Assets Line Items |  |  |
Secured Tax Assets deferred taxes | € 9,363,000,000 | € 9,363,000,000 | € 9,433,000,000
[1] | (*) In 2017 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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