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Note 22 - Financial Liabilities at Fair Value Through Profit or Loss - Derivative Financial Liabilities FVTPL (Details) - ARS ($) | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2017
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Derivative Financial Liabilities FVTPL Abstract |  |  |
Foreign Currency Forwards Liabilities | $ 889,731,000 | $ 203,218,000 | $ 9,342,000
Interest Rate Swaps Liabilities | 487,528,000 | 136,035,000 | 98,088,000
Total Derivative Financial Liabilities FVTPL | $ 1,377,259,000 | $ 339,253,000 | $ 107,430,000

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- References No definition available. + Details
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Period Type: | duration

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- Definition The amount of foreign currency forwards contracts held by the entity. + References No definition available. + Details
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Namespace Prefix: | bfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of interest rate swap contracts held by the entity. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard -URIDate 2018-03-16 + Details
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