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Note 23 - Assets and Liabilities under reinsurance and insurance contracts. Mathematical Reserves (Details) - EUR (€) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Matematical Reserves Line Items |  |  |  |
INSURANCE OR REINSURANCE ASSETS |  | € 306,000,000 | € 341,000,000 | € 366,000,000
Spain [Member] | Individual Insurance [Member] |  |  |  |
Matematical Reserves Line Items |  |  |  |
Mortality Table | [1] | GRMF 80-2, GKM 80 / GKMF 95, PASEM, GKMF 80/95, PERFM 2000 | GRMF 80-2, GKMF 80/95. PASEM, PERMF 2000 | GRMF 80-2, GKM 80 / GKMF 95 PERMF 2000 PASEM
Average Technical Interest Type | [1] | 0.25% -2.87% | 0.25% -2.91% | 0.26%-3.27%
Spain [Member] | Savings Insurance [Member] |  |  |  |
Matematical Reserves Line Items |  |  |  |
Mortality Table | [2] | PERFM 2000 | PERMF 2000 | PERMF 2000
Average Technical Interest Type | [2] | Depending on the related portfolio | Depending on the related portfolio | Depending on the related portfolio
Mexico [Member] | Individual Insurance [Member] |  |  |  |
Matematical Reserves Line Items |  |  |  |
Mortality Table | [1] | Tables of the Comisión Nacional de Seguros y Fianzas 2000-individual | Tables of the Comisión Nacional de Seguros y Fianzas 2000-individual | Tables of the Comisión Nacional de Seguros y Fianzas 2000-individual
Average Technical Interest Type | [1] | 2.5% | 2.50% | 2.50%
Mexico [Member] | Savings Insurance [Member] |  |  |  |
Matematical Reserves Line Items |  |  |  |
Mortality Table | [2] | Tables of the Comisión Nacional de Seguros y Fianzas 2000-grupo | Tables of the Comisión Nacional de Seguros y Fianzas 2000-grupo | Tables of the Comisión Nacional de Seguros y Fianzas 2000-grupo
Average Technical Interest Type | [2] | 5.5% | 5.50% | 5.50%
[1] | (1) Provides coverage in the case of one or more of the following events: death and disability.
[2] | (2) Insurance policies purchased by companies (other than BBVA Group entities) on behalf of their employees.

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