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FINANCIAL INSTRUMENTS - Gains and losses (Details) - ARS ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
FINANCIAL INSTRUMENTS |  |
Net gain (loss) on financial assets at amortised cost | $ 7,421 | $ 11,782
Net gain (loss) on financial liabilities at amortised cost | (19,848) | (63,332)
Net gain (loss) on financial assets at fair value through profit or loss | 2,600 | 3,406
Net gain (loss) on financial liabilities at fair value through profit or loss |  | (352)
Net gain (loss) financial liabilities at amortized cost through profit or loss | (1,190) |
Total gain (loss) on financial instruments | (11,017) | (48,496)
Interest on financial assets at amortised cost | 654 | 2,972
Interest on financial liabilities at amortised cost | (13,701) | (9,594)
Interest on financial assets at fair value through profit or loss | 966 | 1,538
Total interest income (expense) on financial instruments | $ (12,081) | $ (5,084)

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