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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
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure Of Oil And Gas Producing Activities [line items] |  |  |
Other | $ (6,212) | $ (4,110) | $ (3,299)
Net profit / (loss) before income tax | 90,144 | 8,703 | (29,804)
Income tax expense / benefit | (51,538) | 3,969 | 1,425
Argentina [member] |  |  |
Disclosure Of Oil And Gas Producing Activities [line items] |  |  |
Net sales to unaffiliated parties | 3,085 | 521 | 18,489
Net intersegment sales | 207,480 | 115,955 | 95,496
Total net revenues | 210,565 | 116,476 | 113,985
Production costs | (114,381) | (69,944) | (65,823)
Exploration expenses | (5,185) | (2,279) | (3,140)
Depreciation and expense for valuation allowances | (72,044) | (45,277) | (38,036)
Impairment of Property, plan and equipment | 3,265 | 5,032 | (34,943)
Other | (2,839) | (2,706) | (836)
Net profit / (loss) before income tax | 19,381 | 1,302 | (28,793)
Income tax expense / benefit | (5,814) | (456) | 10,434
Results of oil and gas producing activities | 13,567 | 846 | (18,359)
Other foreign [Member] |  |  |
Disclosure Of Oil And Gas Producing Activities [line items] |  |  |
Net sales to unaffiliated parties |  |  | 98
Total net revenues |  |  | 98
Production costs |  |  | (39)
Exploration expenses | (224) | (168) | (17)
Depreciation and expense for valuation allowances |  |  | (90)
Impairment of Property, plan and equipment | (365) |  |
Other | (168) |  |
Net profit / (loss) before income tax | (757) | (168) | (48)
Income tax expense / benefit | 227 | 59 | 16
Results of oil and gas producing activities | (530) | (109) | (32)
Worldwide [member] |  |  |
Disclosure Of Oil And Gas Producing Activities [line items] |  |  |
Net sales to unaffiliated parties | 3,085 | 521 | 18,587
Net intersegment sales | 207,480 | 115,955 | 95,496
Total net revenues | 210,565 | 116,476 | 114,083
Production costs | (114,381) | (69,944) | (65,862)
Exploration expenses | (5,409) | (2,447) | (3,157)
Depreciation and expense for valuation allowances | (72,044) | (45,277) | (38,126)
Impairment of Property, plan and equipment | 2,900 | 5,032 | (34,943)
Other | (3,007) | (2,706) | (836)
Net profit / (loss) before income tax | 18,624 | 1,134 | (28,841)
Income tax expense / benefit | (5,587) | (397) | 10,450
Results of oil and gas producing activities | $ 13,037 | $ 737 | $ (18,391)

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