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Supplemental Information on Oil And Gas Producing Activities (Unaudited) - Summary of Standardized Measure of Discounted Future Net Cash Flows (Detail) - ARS ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Argentina [member]
Disclosure of discounted future net cash flow [line items]
Future cash inflows	$ 2,071,924	$ 2,545,028	$ 1,786,896
Future production costs	(1,128,613)	(1,333,468)	(913,980)
Future development costs	(644,714)	(482,015)	(304,448)
Future income tax expenses	(13,420)	(120,966)	(121,388)
10% annual discount for estimated timing of cash flows	(105,899)	(227,670)	(138,847)
Total standardized measure of discounted future net cash flows	179,278	380,909	308,233
Worldwide [member]
Disclosure of discounted future net cash flow [line items]
Future cash inflows	2,071,924	2,545,028	1,786,896
Future production costs	(1,128,613)	(1,333,468)	(913,980)
Future development costs	(644,714)	(482,015)	(304,448)
Future income tax expenses	(13,420)	(120,966)	(121,388)
10% annual discount for estimated timing of cash flows	(105,899)	(227,670)	(138,847)
Total standardized measure of discounted future net cash flows	$ 179,278	$ 380,909	$ 308,233

X

- Definition

Amount of estimated future accumulated cash inflow from the sale of 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

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- Definition

Amount of estimated future accumulated cash outflow for costs to be incurred in developing 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

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X

- Definition

Amount of estimated future accumulated cash outflow for income tax, based on the future income less future expense derived from production and sale of 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

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- Definition

Amount of estimated future accumulated cash outflow for costs to be incurred in producing 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

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- Definition

Amount of discount on future accumulated cash inflow, after deducting future accumulated cash outflow for development and production costs and future income tax, from sale of proved oil and gas reserves, using a discount rate of ten percent a year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Form 20-F
-Section Item 18
-Subsection Instruction 2

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. Disclosure of discounted future net cash flow.

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- Definition

Standardized measure of discounted future net cash flows relating to proved oil and gas reserve.

+ References

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