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Note 44 - Related Parties - Remuneration of Key Management Personnel (Details) - ARS ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Key Management Personnel Compensation Abstract |  |
Key Management Personnel Fees | $ 18,388,000 | $ 8,841,000
Key Management Personnel Compensation Total | $ 18,388,000 | $ 8,841,000

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

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- Definition The amount of fees to key management personnel. + References No definition available. + Details
Name: | bfr_Keymanagementpersonnelfees
Namespace Prefix: | bfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of compensation to key management personnel. [Refer: Key management personnel of entity or parent [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2018-01-01 -Paragraph 17 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2018-03-01&anchor=para_17&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_KeyManagementPersonnelCompensation
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration