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Loans - Breakdown of Group's Borrowings (Detail) - ARS ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of detailed information about borrowings [abstract] |  |  |
Balance at beginning of the year | $ 154,345 | $ 105,751 | $ 49,305
Proceed from loans | 54,719 | 101,322 | 55,158
Payments of loans | (36,346) | (73,286) | (24,090)
Payments of interest | (17,912) | (16,330) | (6,780)
Accrued interest | 17,995 | 16,623 | 8,342
Net exchange differences and translation | 21,465 | 20,265 | 26,189
Reclassifications and other movements | (3,203) |  | (2,373)
Balance at the end of the year | $ 191,063 | $ 154,345 | $ 105,751

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