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Fair Values Of Financial Instruments - Assets And Liabilities Not Measured At Fair Value (Details) - ARS ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | --- | ---
Financial Assets Abstract |  |  |  |
CASH AND CASH EQUIVALENTS | $ 156,259,910 | $ 152,456,309 | $ 86,844,057 | $ 136,520,755
Reverse Repurchase Agreements | 0 | 19,566,144 |  |
Other Financial Assets | 10,897,537 | 19,786,689 |  |
Financial Liabilities Abstract |  |  |  |
Repurchase agreements | 0 | 22,030 |  |
Other Financial Liabilities | 28,825,175 | 43,364,418 |  |
Bank Loans | 6,148,876 | 8,503,124 |  |
Debt Securities Issued | 7,319,081 | 3,805,337 |  |
Accounting Balance Member |  |  |  |
Financial Assets Abstract |  |  |  |
CASH AND CASH EQUIVALENTS | 156,259,910 | 152,456,309 |  |
Reverse Repurchase Agreements |  | 19,566,144 |  |
Other Financial Assets | 10,897,537 | 19,786,689 |  |
Loans And Advances Not Measured at Fair Value | 195,129,732 | 279,336,187 |  |
Financial Liabilities Abstract |  |  |  |
Deposits | 293,988,047 | 399,209,017 |  |
Repurchase agreements |  | 22,030 |  |
Other Financial Liabilities | 28,825,175 | 43,364,418 |  |
Bank Loans | 6,148,876 | 8,503,124 |  |
Debt Securities Issued | 7,319,081 | 3,805,337 |  |
Total Fair Value Member |  |  |  |
Financial Assets Abstract |  |  |  |
Loans And Advances Not Measured at Fair Value | 193,160,534 | 271,977,546 |  |
Financial Liabilities Abstract |  |  |  |
Deposits | 292,145,753 | 395,210,860 |  |
Bank Loans | 6,116,044 |  |  |
Debt Securities Issued | 7,264,514 | 3,710,516 |  |
Level 2 - Fair Value Member |  |  |  |
Financial Assets Abstract |  |  |  |
CASH AND CASH EQUIVALENTS | 0 | 0 |  |
Reverse Repurchase Agreements |  | 0 |  |
Other Financial Assets | 0 | 0 |  |
Loans And Advances Not Measured at Fair Value | 193,160,534 | 271,977,546 |  |
Financial Liabilities Abstract |  |  |  |
Deposits | 292,145,753 | 395,210,860 |  |
Repurchase agreements |  | 0 |  |
Other Financial Liabilities | 0 | 0 |  |
Bank Loans | 6,116,044 | 0 |  |
Debt Securities Issued | $ 7,264,514 | $ 3,710,516 |  |

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