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Note 41 - Fair Values of Financial Instruments - Assets and Liabilities Measured at Fair Value (Details) - ARS ($) | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2017
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Financial Assets Abstract |  |  |
Debt Securities FVTPL | $ 7,508,099,000 | $ 8,588,127,000 | $ 6,764,936,000
Derivative Financial Assets FVTPL | 591,418,000 | 210,756,000 | 98,987,000
Equity Instruments FVTPL | 528,026,000 | 695,664,000 | 407,664,000
Debt Securities FVOCI | 24,550,036,000 | 25,202,235,000 | 17,214,820,000
Equity Instruments FVOCI | 13,926,000 | 18,244,000 | 18,156,000
Financial Liabilities Abstract |  |  |
Trading Liabilities FVTPL | 692,270,000 | 0 | 0
Derivative Financial Liabilities FVTPL | 1,377,259,000 | 339,253,000 | 107,430,000
Accounting Balance Member |  |  |
Financial Assets Abstract |  |  |
Debt Securities FVTPL | 7,508,099,000 | 8,588,127,000 | 6,764,936,000
Derivative Financial Assets FVTPL | 591,418,000 | 210,756,000 | 98,987,000
Equity Instruments FVTPL | 528,026,000 | 695,664,000 | 407,664,000
Debt Securities FVOCI | 24,821,610,000 | 25,207,899,000 | 17,214,820,000
Equity Instruments FVOCI | 13,926,000 | 18,244,000 | 18,156,000
Financial Liabilities Abstract |  |  |
Trading Liabilities FVTPL | 692,270,000 |  |
Derivative Financial Liabilities FVTPL | 1,377,259,000 | 339,253,000 | 107,430,000
Total Fair Value Member |  |  |
Financial Assets Abstract |  |  |
Debt Securities FVTPL | 7,508,099,000 | 8,588,127,000 | 6,764,936,000
Derivative Financial Assets FVTPL | 591,418,000 | 210,756,000 | 98,987,000
Equity Instruments FVTPL | 528,026,000 | 695,664,000 | 407,664,000
Debt Securities FVOCI | 24,821,610,000 | 25,207,899,000 | 17,214,820,000
Equity Instruments FVOCI | 13,926,000 | 18,244,000 | 18,156,000
Financial Liabilities Abstract |  |  |
Trading Liabilities FVTPL | 692,270,000 |  |
Derivative Financial Liabilities FVTPL | 1,377,259,000 | 339,253,000 | 107,430,000
Level 1 - Fair Value Member |  |  |
Financial Assets Abstract |  |  |
Debt Securities FVTPL | 54,011,000 | 6,277,865,000 | 2,359,335,000
Derivative Financial Assets FVTPL | 0 | 0 | 0
Equity Instruments FVTPL | 528,026,000 | 695,664,000 | 407,664,000
Debt Securities FVOCI | 100,166,000 | 16,203,297,000 | 1,197,145,000
Equity Instruments FVOCI | 13,226,000 | 17,567,000 | 0
Financial Liabilities Abstract |  |  |
Trading Liabilities FVTPL | 162,696,000 |  |
Derivative Financial Liabilities FVTPL | 0 | 0 | 0
Level 2 - Fair Value Member |  |  |
Financial Assets Abstract |  |  |
Debt Securities FVTPL | 7,454,088,000 | 2,310,262,000 | 4,405,601,000
Derivative Financial Assets FVTPL | 591,418,000 | 210,756,000 | 98,987,000
Equity Instruments FVTPL | 0 | 0 | 0
Debt Securities FVOCI | 24,721,444,000 | 9,004,602,000 | 16,017,675,000
Equity Instruments FVOCI | 700,000 | 677,000 | 18,156,000
Financial Liabilities Abstract |  |  |
Trading Liabilities FVTPL | 529,574,000 |  |
Derivative Financial Liabilities FVTPL | $ 1,377,259,000 | $ 339,253,000 | $ 107,430,000

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