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Investment Funds - Equity Value Of Investment Funds (Details) - ARS ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Investment Funds [Line Items] |  |
Investment Funds Equity | $ 44,089,527 | $ 53,174,566
FBA Renta Pesos [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 39,129,811 | 24,433,615
FBA Horizonte [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 790,936 | 2,014,548
FBA Renta Fija Dolar Plus [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 718,995 | 2,434,999
FBA Acciones Latinoamericanas [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 551,067 | 559,170
FBA Calificado [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 472,930 | 586,498
FBA Renta Fija Dolar [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 470,455 | 5,765,286
FBA Ahorro Pesos [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 462,399 | 9,695,147
FBA Acciones Argentinas [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 354,355 | 571,764
FBA Bonos Latam [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 317,683 | 56,484
FBA Bonos Argentina [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 248,449 | 6,171,650
FBA Bonos Globales [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 201,829 | 52,609
FBA Retorno Total II [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 85,002 | 101,053
FBA Brasil I [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 82,972 | 1,629
FBA Horizonte Plus [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 77,087 | 145,556
FBA Renta Fija Plus [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 52,745 | 338,402
FBA Retorno Total I [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 28,465 | 88,529
FBA Gestión I [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 23,163 |
FBA Renta Mixta [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 17,694 | 129,212
FBA Renta Fija Local [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 1,384 | 1,631
FBA Renta Publica I [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | 1,384 | 1,631
FBA Renta Publica II [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity | $ 722 | 580
FBA Renta Pesos Plus [member] |  |
Investment Funds [Line Items] |  |
Investment Funds Equity |  | $ 24,573

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