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DESCRIPTION OF BUSINESS AND BASIS OF PREPARATION OF THE CONSOLIDATED FINANCIAL STATEMENTS - Segment financial information of Consolidated Income Statement (Details) - ARS ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Segment financial information |  |  |
Revenues | $ 237,024 | $ 258,518 | $ 102,531
Operating costs without depreciation, amortization and impairment of fixed assets | (159,940) | (171,803) | (65,436)
Adjusted EBITDA | 77,084 | 86,715 | 37,095
Depreciation, amortization and impairment of fixed assets | (61,289) | (54,014) | (15,082)
Operating income | 15,795 | 32,701 | 22,013
Earnings from associates | (187) | 363 | 543
Debt financial expenses | (16,657) | (52,262) | (334)
Other financial results, net | 11,331 | 23,348 | 1,431
Income before income tax (expense) benefit | 10,282 | 4,150 | 23,653
Income tax (expense) benefit | (14,170) | 4,366 | (8,486)
Net (loss) income for the year | (3,888) | 8,516 | 15,167
Attributable to: |  |  |
Controlling Company | (4,396) | 8,145 | 14,969
Non-controlling interest | 508 | 371 | 198
Eliminations |  |  |
Segment financial information |  |  |
Revenues | (1,224) | (1,083) | (12)
Operating costs without depreciation, amortization and impairment of fixed assets | 1,224 | 1,083 | 12
Services rendered in Argentina |  |  |
Segment financial information |  |  |
Revenues | 182,233 | 129,836 | 39,870
Operating costs without depreciation, amortization and impairment of fixed assets | (121,682) | (85,942) | (25,082)
Adjusted EBITDA | 60,551 | 43,894 | 14,788
Depreciation, amortization and impairment of fixed assets | (26,024) | (20,416) | (3,880)
Operating income | 34,527 | 23,478 | 10,908
Services rendered in Argentina | Restated for inflation |  |  |
Segment financial information |  |  |
Revenues | 222,260 | 244,603 | 100,711
Operating costs without depreciation, amortization and impairment of fixed assets | (150,075) | (162,599) | (64,235)
Adjusted EBITDA | 72,185 | 82,004 | 36,476
Depreciation, amortization and impairment of fixed assets | (57,568) | (50,603) | (14,901)
Operating income | 14,617 | 31,401 | 21,575
Services rendered in Argentina | Inflation restatement |  |  |
Segment financial information |  |  |
Revenues | 40,027 | 114,767 | 60,841
Operating costs without depreciation, amortization and impairment of fixed assets | (28,393) | (76,657) | (39,153)
Adjusted EBITDA | 11,634 | 38,110 | 21,688
Depreciation, amortization and impairment of fixed assets | (31,544) | (30,187) | (11,021)
Operating income | (19,910) | 7,923 | 10,667
Other abroad segments |  |  |
Segment financial information |  |  |
Revenues | 12,931 | 7,894 | 1,074
Operating costs without depreciation, amortization and impairment of fixed assets | (8,946) | (5,414) | (711)
Adjusted EBITDA | 3,985 | 2,480 | 363
Depreciation, amortization and impairment of fixed assets | (2,869) | (1,753) | (106)
Operating income | 1,116 | 727 | 257
Other abroad segments | Restated for inflation |  |  |
Segment financial information |  |  |
Revenues | 15,988 | 14,998 | 1,832
Operating costs without depreciation, amortization and impairment of fixed assets | (11,089) | (10,287) | (1,213)
Adjusted EBITDA | 4,899 | 4,711 | 619
Depreciation, amortization and impairment of fixed assets | (3,721) | (3,411) | (181)
Operating income | 1,178 | 1,300 | 438
Other abroad segments | Inflation restatement |  |  |
Segment financial information |  |  |
Revenues | 3,057 | 7,104 | 758
Operating costs without depreciation, amortization and impairment of fixed assets | (2,143) | (4,873) | (502)
Adjusted EBITDA | 914 | 2,231 | 256
Depreciation, amortization and impairment of fixed assets | (852) | (1,658) | (75)
Operating income | $ 62 | $ 573 | $ 181

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