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Note 36 - Transactions on behalf of third parties (Details) - EUR (€) | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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Transactions On Behalf Of Third Parties Abstract |  |  |
Financial instruments entrusted by third parties | € 357,022,000,000 | € 693,497,000,000 | € 689,157,000,000
Conditional bills and other securities received for collection | 10,459,000,000 | 13,133,000,000 | 13,484,000,000
Securities Lending | 5,285,000,000 | 7,129,000,000 | 4,866,000,000
Total Transactions Third Parties | € 372,766,000,000 | € 713,759,000,000 | € 707,508,000,000

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