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Nota 2 - Principles Of Consolidation, Acounting policies and measurement bases applied and recent IFRS pronouncements - Hedge Instrumets Affected by IBOR (Details) | 12 Months Ended
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Dec. 31, 2020 EUR (€)
LIBOR USD [Member] |  |
Hedge Instruments Affected By IBOR Line Items |  |
Cash Flow Hedges IBOR Amendment | € 9,084,000,000 |
Fair Value Hedges IBOR Amendment | 10,608,000,000 |
LIBOR GBP [Member] |  |
Hedge Instruments Affected By IBOR Line Items |  |
Cash Flow Hedges IBOR Amendment | 0 |
Fair Value Hedges IBOR Amendment | 266,000,000 |
Others [Member] |  |
Hedge Instruments Affected By IBOR Line Items |  |
Cash Flow Hedges IBOR Amendment | 574,000,000 | [1]
Fair Value Hedges IBOR Amendment | 1,477,000,000 | [1]
Total Member |  |
Hedge Instruments Affected By IBOR Line Items |  |
Cash Flow Hedges IBOR Amendment | 9,658,000,000 |
Fair Value Hedges IBOR Amendment | € 12,351,000,000 |
[1] | (*) Equilibrium Interbank Interest Rate used in Mexico.

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