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Financial Instruments by Category - Summary of Gains and Losses on Financial Instruments (Detail) - ARS ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of detailed information about financial instruments [line items] |  |  |
Interest income | $ 7,665 | $ 3,033 | $ 1,598
Interest loss | (48,136) | (28,717) | (18,385)
Net financial accretion | (5,592) | 7,627 | (3,169)
Net exchange differences | 47,935 | 54,459 | 8,950
Fair value gains on financial assets at fair value through profit or loss | (1,449) | 2,596 | 2,208
Result from derivative financial instruments | (293) | 933 |
Result from net monetary position | 5,904 | 1,594 |
Net financial results | 6,034 | 41,525 | (8,798)
Financial and non-financial Assets / Liabilities at amortized cost [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Interest income | 7,665 | 3,033 | 1,598
Interest loss | (48,136) | (28,717) | (18,385)
Net financial accretion | (5,592) | 7,627 | (3,169)
Net exchange differences | 47,935 | 54,459 | 8,950
Result from net monetary position | 5,904 | 1,594 |
Net financial results | 7,776 | 37,996 | (11,006)
Financial Assets / Liabilities at fair value through profit or loss [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Fair value gains on financial assets at fair value through profit or loss | (1,449) | 2,596 | 2,208
Result from derivative financial instruments | (293) | 933 |
Net financial results | $ (1,742) | $ 3,529 | $ 2,208

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