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Investments in Associates and Joint Ventures - Summary of Investments Information (Detail) $ / shares in Units, $ in Millions | 12 Months Ended |  |
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Dec. 31, 2017 ARS ($) $ / shares shares | Dec. 31, 2016 ARS ($) | Dec. 31, 2015 ARS ($) | Dec. 31, 2017 $ / shares | Dec. 31, 2014 ARS ($)
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities face value | $ / shares | $ 10 |  |  |  |
Book Value | $ 6,057 | $ 5,500 |  |  |
Cost | 208 |  |  |  |
Net profit (loss) | 12,672 | (28,379) | $ 4,426 |  |
Equity | $ 152,533 | 118,661 | 120,461 |  | $ 72,781
Subsidiaries [member] | YPF International S.A. [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities amount | shares | 66,897 |  |  |  |
Main business | Investment |  |  |  |
Registered address | Street La Plata 19, Santa Cruz de la Sierra, República de Bolivia |  |  |  |
Last Financial Statements Date | Dec. 31, 2017 |  |  |  |
Capital stock | $ 15 |  |  |  |
Net profit (loss) | (1) |  |  |  |
Equity | $ 24 |  |  |  |
Holding in capital stock | 100.00% |  |  |  |
Subsidiaries [member] | YPF Holdings Inc [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities face value | $ / shares |  |  |  | $ 0.01 |
Securities amount | shares | 810,614 |  |  |  |
Main business | Investment and finance |  |  |  |
Registered address | 10333 Richmond Avenue I, Suite 1050, TX, U.S.A. |  |  |  |
Last Financial Statements Date | Dec. 31, 2017 |  |  |  |
Capital stock | $ 15,075 |  |  |  |
Net profit (loss) | (429) |  |  |  |
Equity | $ (3,726) |  |  |  |
Holding in capital stock | 100.00% |  |  |  |
Subsidiaries [member] | Operadora de Estaciones de Servicio S.A.[member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities face value | $ / shares | $ 1 |  |  |  |
Securities amount | shares | 163,701,747 |  |  |  |
Main business | Commercial management of YPF's gas stations |  |  |  |
Registered address | Macacha Güemes 515, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Dec. 31, 2017 |  |  |  |
Capital stock | $ 164 |  |  |  |
Net profit (loss) | 709 |  |  |  |
Equity | $ 907 |  |  |  |
Holding in capital stock | 99.99% |  |  |  |
Subsidiaries [member] | A-Evangelista S.A. [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities face value | $ / shares | $ 1 |  |  |  |
Securities amount | shares | 307,095,088 |  |  |  |
Main business | Engineering and construction services |  |  |  |
Registered address | Macacha Güemes 515, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Dec. 31, 2017 |  |  |  |
Capital stock | $ 307 |  |  |  |
Net profit (loss) | 3 |  |  |  |
Equity | $ 1,127 |  |  |  |
Holding in capital stock | 100.00% |  |  |  |
Subsidiaries [member] | YPF Servicios Petroleros S.A. [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities face value | $ / shares | $ 1 |  |  |  |
Securities amount | shares | 50,000 |  |  |  |
Main business | Wells perforation and/or reparation services |  |  |  |
Registered address | Macacha Güemes 515, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Dec. 31, 2017 |  |  |  |
Net profit (loss) | $ (174) |  |  |  |
Equity | $ (192) |  |  |  |
Holding in capital stock | 100.00% |  |  |  |
Subsidiaries [member] | Metrogas S.A. [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities face value | $ / shares | $ 1 |  |  |  |
Securities amount | shares | 398,419,700 |  |  |  |
Main business | Providing the public service of natural gas distribution |  |  |  |
Registered address | Gregorio Aráoz de Lamadrid 1360, Buenos Aires, Argentina. |  |  |  |
Last Financial Statements Date | Dec. 31, 2017 |  |  |  |
Capital stock | $ 569 |  |  |  |
Net profit (loss) | 773 |  |  |  |
Equity | $ 8,985 |  |  |  |
Holding in capital stock | 70.00% |  |  |  |
Subsidiaries [member] | YPF Energia Electrica S.A [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities face value | $ / shares | $ 1 |  |  |  |
Securities amount | shares | 2,506,555,895 |  |  |  |
Main business | Exploration, development, industrialization and marketing of hydrocarbons, and generation, transportation and marketing of electric power |  |  |  |
Registered address | Macacha Güemes 515, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Dec. 31, 2017 |  |  |  |
Capital stock | $ 2,507 |  |  |  |
Net profit (loss) | 928 |  |  |  |
Equity | $ 3,441 |  |  |  |
Holding in capital stock | 100.00% |  |  |  |
Subsidiaries [member] | YPF Chile S.A. [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities amount | shares | 50,968,649 |  |  |  |
Main business | Lubricants and aviation fuels trading and hydrocarbons research and exploration |  |  |  |
Registered address | Villarica 322; Módulo B1, Qilicura, Santiago |  |  |  |
Last Financial Statements Date | Dec. 31, 2017 |  |  |  |
Capital stock | $ 849 |  |  |  |
Net profit (loss) | (103) |  |  |  |
Equity | $ 1,389 |  |  |  |
Holding in capital stock | 100.00% |  |  |  |
Subsidiaries [member] | YPF Tecnologia S A [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities face value | $ / shares | $ 1 |  |  |  |
Securities amount | shares | 234,291,000 |  |  |  |
Main business | Investigation, development, production and marketing of technologies, knowledge, goods and services |  |  |  |
Registered address | Macacha Güemes 515, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Dec. 31, 2017 |  |  |  |
Capital stock | $ 459 |  |  |  |
Net profit (loss) | 38 |  |  |  |
Equity | $ 690 |  |  |  |
Holding in capital stock | 51.00% |  |  |  |
Subsidiaries [member] | YSUR Inversora S.A.U. [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | - |  |  |  |
Main business | Investment |  |  |  |
Registered address | Macacha Güemes 515, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Dec. 31, 2016 |  |  |  |
Capital stock | $ 2,657 |  |  |  |
Net profit (loss) | (1) |  |  |  |
Equity | $ 5,397 |  |  |  |
Holding in capital stock | 100.00% |  |  |  |
Subsidiaries [member] | YSUR Inversiones Petroleras S.A.U. [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | - |  |  |  |
Main business | Investment |  |  |  |
Registered address | Macacha Güemes 515, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Dec. 31, 2016 |  |  |  |
Capital stock | $ 230 |  |  |  |
Equity | $ 391 |  |  |  |
Holding in capital stock | 100.00% |  |  |  |
Subsidiaries [member] | YSUR Petrolera Argentina S.A.[member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | - |  |  |  |
Main business | Exploration, extraction, exploitation, storage, transportation, industrialization and marketing of hydrocarbons, as well as other related operations |  |  |  |
Registered address | Macacha Güemes 515, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Dec. 31, 2016 |  |  |  |
Capital stock | $ 634 |  |  |  |
Net profit (loss) | 106 |  |  |  |
Equity | $ 570 |  |  |  |
Holding in capital stock | 100.00% |  |  |  |
Subsidiaries [member] | Compania de Inversiones Mineras S.A. [Member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities face value | $ / shares | $ 1 |  |  |  |
Securities amount | shares | 236,474,420 |  |  |  |
Main business | Exploration, exploitation, processing, management, storage and transport of all types of minerals; assembly, construction and operation of facilities and structures and processing of products related to mining |  |  |  |
Registered address | Macacha Güemes 515, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Dec. 31, 2017 |  |  |  |
Capital stock | $ 236 |  |  |  |
Net profit (loss) | (21) |  |  |  |
Equity | $ 182 |  |  |  |
Holding in capital stock | 100.00% |  |  |  |
Subsidiaries [member] | Bajo Del Toro II SRL [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Social cuotes |  |  |  |
Securities face value | $ / shares | $ 1 |  |  |  |
Securities amount | shares | 1,270,815,165 |  |  |  |
Main business | Exploration, discovery, exploitation, purchase, production, storage, transport, import, export and marketing of all types of liquid or gaseous hydrocarbons and exercise all acts that are not prohibited by law including but not limited to the execution of money loans as lender and / or borrower. |  |  |  |
Registered address | Macacha Güemes 515, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Dec. 31, 2017 |  |  |  |
Capital stock | $ 1,271 |  |  |  |
Net profit (loss) | 90 |  |  |  |
Equity | $ 1,341 |  |  |  |
Holding in capital stock | 100.00% |  |  |  |
Joint Ventures [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Book Value | $ 5,070 | 3,573 |  |  |
Net profit (loss) | $ 885 | 363 | $ (3) |  |
Joint Ventures [member] | Compania Mega SA [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities face value | $ / shares | $ 1 |  |  |  |
Securities amount | shares | 244,246,140 |  |  |  |
Book Value | $ 1,725 | 1,208 |  |  |
Main business | Separation, fractionation and transportation of natural gas liquids |  |  |  |
Registered address | San Martín 344, P. 10º, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Sep. 30, 2017 |  |  |  |
Capital stock | $ 643 |  |  |  |
Net profit (loss) | 1,071 |  |  |  |
Equity | $ 2,381 |  |  |  |
Holding in capital stock | 38.00% |  |  |  |
Joint Ventures [member] | Profertil SA [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities face value | $ / shares | $ 1 |  |  |  |
Securities amount | shares | 391,291,320 |  |  |  |
Book Value | $ 2,862 | 1,897 |  |  |
Main business | Production and marketing of fertilizers |  |  |  |
Registered address | Alicia Moreau de Justo 740, P. 3, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Sep. 30, 2017 |  |  |  |
Capital stock | $ 783 |  |  |  |
Net profit (loss) | 197 |  |  |  |
Equity | $ 1,249 |  |  |  |
Holding in capital stock | 50.00% |  |  |  |
Joint Ventures [member] | Refinera Del Norte SA [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities face value | $ / shares | $ 1 |  |  |  |
Securities amount | shares | 45,803,655 |  |  |  |
Book Value | $ 483 | 468 |  |  |
Main business | Refining |  |  |  |
Registered address | Maipú 1, P. 2º, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Sep. 30, 2017 |  |  |  |
Capital stock | $ 92 |  |  |  |
Net profit (loss) | (10) |  |  |  |
Equity | $ 980 |  |  |  |
Holding in capital stock | 50.00% |  |  |  |
Associates [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Book Value | $ 987 | 1,927 |  |  |
Cost | $ 208 |  |  |  |
Associates [member] | Oleoductos del Valle SA [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities face value | $ / shares | $ 10.00 |  |  |  |
Securities amount | shares | 4,072,749 |  |  |  |
Book Value | $ 242 | 174 |  |  |
Main business | Oil transportation by pipeline |  |  |  |
Registered address | Florida 1, P. 10º, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Sep. 30, 2017 |  |  |  |
Capital stock | $ 110 |  |  |  |
Net profit (loss) | 135 |  |  |  |
Equity | $ 576 |  |  |  |
Holding in capital stock | 37.00% |  |  |  |
Associates [member] | Terminales Maritimas Patagonicas SA [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities face value | $ / shares | $ 10.00 |  |  |  |
Securities amount | shares | 476,034 |  |  |  |
Book Value | $ 103 | 94 |  |  |
Main business | Oil storage and shipment |  |  |  |
Registered address | Av. Leandro N. Alem 1180, P. 11º, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Sep. 30, 2017 |  |  |  |
Capital stock | $ 14 |  |  |  |
Net profit (loss) | 20 |  |  |  |
Equity | $ 304 |  |  |  |
Holding in capital stock | 33.15% |  |  |  |
Associates [member] | Oiltanking Ebytem SA [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities face value | $ / shares | $ 10.00 |  |  |  |
Securities amount | shares | 351,167 |  |  |  |
Book Value | $ 211 | 184 |  |  |
Main business | Hydrocarbon transportation and storage |  |  |  |
Registered address | Terminal Marítima Puerto Rosales - Provincia de Buenos Aires, Argentina. |  |  |  |
Last Financial Statements Date | Sep. 30, 2017 |  |  |  |
Capital stock | $ 12 |  |  |  |
Net profit (loss) | 247 |  |  |  |
Equity | $ 279 |  |  |  |
Holding in capital stock | 30.00% |  |  |  |
Associates [member] | Gasoducto del Pacifico (Argentina) S.A. [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Preferred |  |  |  |
Securities face value | $ / shares | $ 1.00 |  |  |  |
Securities amount | shares | 15,579,578 |  |  |  |
Book Value | $ 44 | 33 |  |  |
Main business | Gas transportation by pipeline |  |  |  |
Registered address | San Martín 323, P.13°, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Dec. 31, 2017 |  |  |  |
Capital stock | $ 156 |  |  |  |
Net profit (loss) | 116 |  |  |  |
Equity | $ 445 |  |  |  |
Holding in capital stock | 10.00% |  |  |  |
Associates [member] | Central Dock Sud SA [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities face value | $ / shares | $ 0.01 |  |  |  |
Securities amount | shares | 11,869,095,145 |  |  |  |
Book Value | $ 0 | 175 |  |  |
Main business | Electric power generation and bulk marketing |  |  |  |
Registered address | Pasaje Ingeniero Butty 220, P.16°, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Mar. 31, 2017 |  |  |  |
Capital stock | $ 1,231 |  |  |  |
Net profit (loss) | 46 |  |  |  |
Equity | $ 1,865 |  |  |  |
Holding in capital stock | 10.25% |  |  |  |
Associates [member] | Inversora Dock Sud S.A. [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities face value | $ / shares | $ 1.00 |  |  |  |
Securities amount | shares | 355,270,303 |  |  |  |
Book Value | $ 0 | 569 |  |  |
Main business | Investment and finance |  |  |  |
Registered address | Pasaje Ingeniero Butty 220, P.16°, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Mar. 31, 2017 |  |  |  |
Capital stock | $ 829 |  |  |  |
Net profit (loss) | 32 |  |  |  |
Equity | $ 1,343 |  |  |  |
Holding in capital stock | 42.86% |  |  |  |
Associates [member] | Oleoducto Trasandino (Argentina) S.A. [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Preferred |  |  |  |
Securities face value | $ / shares | $ 1.00 |  |  |  |
Securities amount | shares | 12,135,167 |  |  |  |
Book Value | $ 41 | 37 |  |  |
Main business | Oil transportation by pipeline |  |  |  |
Registered address | Macacha Güemes 515, P.3º, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Sep. 30, 2017 |  |  |  |
Capital stock | $ 34 |  |  |  |
Net profit (loss) | 9 |  |  |  |
Equity | $ 118 |  |  |  |
Holding in capital stock | 36.00% |  |  |  |
Associates [member] | YPF Gas SA [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | Common |  |  |  |
Securities face value | $ / shares | $ 1.00 |  |  |  |
Securities amount | shares | 59,821,434 |  |  |  |
Book Value | $ 235 | 172 |  |  |
Main business | Gas fractionation, bottling, distribution and transport for industrial and/or residential use |  |  |  |
Registered address | Macacha Güemes 515, P.3º, Buenos Aires, Argentina |  |  |  |
Last Financial Statements Date | Sep. 30, 2017 |  |  |  |
Capital stock | $ 176 |  |  |  |
Net profit (loss) | 215 |  |  |  |
Equity | $ 884 |  |  |  |
Holding in capital stock | 34.00% |  |  |  |
Associates [member] | Other Related Parties [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Securities class | - |  |  |  |
Book Value | $ 111 | $ 489 |  |  |
Cost | $ 208 |  |  |  |
Main business | - |  |  |  |
Registered address | - |  |  |  |

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