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Contractual Commitments - Agreements of Extension of Concessions - Additional Information (Detail) - USD ($) $ in Millions |  |  |  |  | 1 Months Ended | 12 Months Ended |  |
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Jan. 08, 2016 | Oct. 02, 2013 | Jul. 24, 2013 | Oct. 23, 2012 | Nov. 30, 2012 | Apr. 30, 2011 | Dec. 31, 2019 | Nov. 14, 2019 | Sep. 30, 2013
Province Of Chubut [member] |  |  |  |  |  |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |  |  |  |  |  |
Exploitation concessions, extended term |  | 30 years |  |  |  |  |  |  |
Magalles area [member] |  |  |  |  |  |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |  |  |  |  |  |
Exploitation concessions, extended term | 10 years |  |  |  |  |  |  |  |
Province of Neuquen [member] | Other concessions [member] | Bottom of range [member] |  |  |  |  |  |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |  |  |  |  |  |
Expire period |  |  |  |  |  |  | 2026 |  |
Province of Neuquen [member] | Other concessions [member] | Top of range [member] |  |  |  |  |  |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |  |  |  |  |  |
Expire period |  |  |  |  |  |  | 2027 |  |
Province of Neuquen [member] | Loma La Lata - Loma Campana [member] |  |  |  |  |  |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |  |  |  |  |  |
Extended period |  |  | 22 years |  |  |  |  |  |
Province of Neuquen [member] | Loma Amarilla Sur [Member] |  |  |  |  |  |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |  |  |  |  |  |
Commitment to Investment |  |  |  |  |  |  |  | $ 60 |
Province of Neuquen [member] | Loma La Lata Norte and Loma Campana areas [member] | Chevron's initial payment [member] |  |  |  |  |  |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |  |  |  |  |  |
Payments of contractual commitments fee |  |  |  |  |  |  |  |  | $ 300
Province of Neuquen [member] | Loma La Lata - Sierra Barrosa areas [member] |  |  |  |  |  |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |  |  |  |  |  |
Extended of additional period |  |  |  |  |  |  | 10 years |  |
Province of Mendoza [member] |  |  |  |  |  |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |  |  |  |  |  |
Extended period |  |  |  |  |  | 10 years |  |  |
Province of Santa Cruz [member] |  |  |  |  |  |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |  |  |  |  |  |
Extended period |  |  |  |  | 25 years |  |  |  |
Salta [Member] |  |  |  |  |  |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |  |  |  |  |  |
Extended period |  |  |  | 10 years |  |  |  |  |
National Executive Branch [member] | Magallanes area [member] |  |  |  |  |  |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |  |  |  |  |  |
Exploitation concessions, extended term | 10 years |  |  |  |  |  |  |  |

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- Definition The amount of capital commitments for which the entity has entered into a contract. [Refer: Capital commitments] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + Details
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