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Note 50 - Subsequent Events (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 ARS ($) shares | Dec. 31, 2018 USD ($) | Dec. 31, 2017 ARS ($)
Ownership Interest Sold Abstract |  |  |
Percent of Ownership Interest Sold on February 1, 2019 | 51% |  |
Quantity of Shares of Ownership Interest Sold on February 1, 2019 | shares | 2,344,064 |  |
Total Price Estimed of Ownership Interest Sold on February 1, 2019 |  | $ 78,265,000 |
Total Price Received of Ownership Interest Sold on February 1, 2019 |  | $ 46,457,000 |
Ownership Interest in Prisma Medios de Pago S.A. presented as Assets Held for Sale | $ 433,597,000 |  | $ 289,945,000

X
- Definition The amount of ownership Interest in Prisma Medios de Pago S.A. presented as Assets Held for Sale. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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X
- References No definition available. + Details
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Data Type: | xbrli:stringItemType
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Period Type: | duration

X
- Definition The percent of ownership interest in Prisma Medios de Pago S.A. sold on February 1, 2019. + References No definition available. + Details
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Namespace Prefix: | bfr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The estimed price of sale of ownership interest in Prisma Medios de Pago S.A. on February 1, 2019. + References No definition available. + Details
Name: | bfr_Priceestimedofownershipinterestsold
Namespace Prefix: | bfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
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X
- Definition The amount received for the sale of ownership interest in Prisma Medios de Pago S.A. on February 1, 2019. + References No definition available. + Details
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Namespace Prefix: | bfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
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X
- Definition The quantity of shares of ownership interest in Prisma Medios de Pago S.A. sold on February 1, 2019. + References No definition available. + Details
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Namespace Prefix: | bfr_
Data Type: | xbrli:sharesItemType
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