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Supplemental Information on Oil And Gas Producing Activities (Unaudited) - Results of Operations from Oil and Gas Producing Activities (Detail) - ARS ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure Of Oil And Gas Producing Activities [Line Items] |  |  |
Total net revenues | $ 261,072 | $ 216,644 | $ 159,387
Other | (4,110) | (3,299) | (2,743)
Net profit (loss) before income tax | 8,703 | (29,804) | 29,063
Income tax expense / benefit | 3,969 | 1,425 | (24,637)
Argentina [member] |  |  |
Disclosure Of Oil And Gas Producing Activities [Line Items] |  |  |
Net sales to unaffiliated parties | 521 | 18,489 | 13,812
Net intersegment sales | 115,955 | 95,496 | 64,191
Total net revenues | 116,476 | 113,985 | 78,003
Production costs | (69,944) | (65,823) | (43,955)
Exploration expenses | (2,279) | (3,140) | (2,342)
Depreciation and expense for valuation allowances | (45,277) | (38,036) | (22,861)
Impairment of Property, plan and equipment | 5,032 | (34,943) | (2,361)
Other | (2,706) | (836) | (401)
Net profit (loss) before income tax | 1,302 | (28,793) | 6,083
Income tax expense / benefit | (456) | 10,434 | (2,114)
Results of oil and gas producing activities | 846 | (18,359) | 3,969
Other foreign [Member] |  |  |
Disclosure Of Oil And Gas Producing Activities [Line Items] |  |  |
Net sales to unaffiliated parties |  | 98 | 197
Total net revenues |  | 98 | 197
Production costs |  | (39) | (89)
Exploration expenses | (168) | (17) | (127)
Depreciation and expense for valuation allowances |  | (90) | (148)
Impairment of Property, plan and equipment |  |  | (174)
Other |  |  | (56)
Net profit (loss) before income tax | (168) | (48) | (397)
Income tax expense / benefit | 59 | 16 | 79
Results of oil and gas producing activities | (109) | (32) | (318)
Worldwide [Member] |  |  |
Disclosure Of Oil And Gas Producing Activities [Line Items] |  |  |
Net sales to unaffiliated parties | 521 | 18,587 | 14,009
Net intersegment sales | 115,955 | 95,496 | 64,191
Total net revenues | 116,476 | 114,083 | 78,200
Production costs | (69,944) | (65,862) | (44,044)
Exploration expenses | (2,447) | (3,157) | (2,469)
Depreciation and expense for valuation allowances | (45,277) | (38,126) | (23,009)
Impairment of Property, plan and equipment | 5,032 | (34,943) | (2,535)
Other | (2,706) | (836) | (457)
Net profit (loss) before income tax | 1,134 | (28,841) | 5,686
Income tax expense / benefit | (397) | 10,450 | (2,035)
Results of oil and gas producing activities | $ 737 | $ (18,391) | $ 3,651

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- Definition The aggregate amount included in the determination of profit (loss) for the period in respect of current tax and deferred tax that relate to continuing operations. [Refer: Continuing operations [member]; Current tax expense (income); Deferred tax expense (income)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2017-01-01 -Paragraph 23 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2017-03-01&anchor=para_23_h&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 26 -IssueDate 2017-01-01 -Paragraph 35 -Subparagraph b -Clause viii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=26&date=2017-03-01&anchor=para_35_b_viii&doctype=Standard -URIDate 2017-03-09 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 79 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_79&doctype=Standard -URIDate 2017-03-09 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph c -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_c_i&doctype=Standard -URIDate 2017-03-09 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 82 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_82_d&doctype=Standard -URIDate 2017-03-09 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_c_ii&doctype=Standard -URIDate 2017-03-09 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2017-01-01 -Paragraph B13 -Subparagraph g -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_B13_g&doctype=Appendix&seq=2 -URIDate 2017-03-09 + Details
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