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

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.

No definition available.

Name:	bfr_Investmentheldincustodybytheentity
Namespace Prefix:	bfr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant