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Note 49 - Investment Funds - Investment Held in Custody by the Entity (Details) - ARS ($) | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2017
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Investment Funds Abstract |  |  |
Investment Held in Custody by the Entity | $ 17,026,024,000 | $ 31,533,051,000 | $ 16,665,210,000

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- References No definition available. + Details
Name: | bfr_Investmentfundsabstract
Namespace Prefix: | bfr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of term deposit certificates, shares, corporate bonds, government securities, mutual investments, and other financial assets that the bank holds in custody, as Custodian Agent of Mutual Funds managed by BBVA Frances Asset Management S.A. Sociedad Gerente de Fondos Comunes de Inversion. + References No definition available. + Details
Name: | bfr_Investmentheldincustodybytheentity
Namespace Prefix: | bfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant