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Supplemental Information on Oil And Gas Producing Activities (Unaudited) - Summary of Changes in the Standardized Measure of Discounted Future Net Cash Flows (Detail) - ARS ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure Of Future Net Cash Flow [Abstract] |  |  |
Beginning of year | $ 380,909 | $ 308,233 | $ 66,433
Sales and transfers, net of production costs | (176,237) | (197,278) | (62,115)
Net change in sales and transfer prices, net of future production costs | (401,237) | (239,226) | 68,651
Changes in reserves and production rates (timing) | (26,428) | (26,496) | 111,137
Net changes for extensions, discoveries and improved recovery | 120,070 | 228,354 | 160,784
Net change due to purchases and sales of minerals in place | (19,624) | (1,152) | (730)
Changes in estimated future development and abandonment costs | (104,300) | (82,799) | (71,368)
Development costs incurred during the year that reduced future development costs | 94,505 | 102,784 | 39,780
Accretion of discount | 48,400 | 43,534 | 11,490
Net change in income taxes | 106,148 | 66,705 | (80,832)
Others | 157,072 | 178,250 | 65,003
End of year | $ 179,278 | $ 380,909 | $ 308,233

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- Definition Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of change in sales and transfer prices and in production (lifting) costs related to future production. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Form 20-F -Section Item 18 -Subsection Instruction 2 + Details
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- Definition Amount of discounted future accumulated cash inflow relating to proved oil and gas reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Form 20-F -Section Item 18 -Subsection Instruction 2 + Details
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- Definition Development costs incurred during year that reduced future development costs. + References No definition available. + Details
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- Definition Increase decrease in income tax expense estimates on future cash flow related to proved oil and gas reserves. + References No definition available. + Details
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- Definition Sales and transfers net of production costs. + References No definition available. + Details
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