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Investments in Associates and Joint Ventures - Summary of Investments Information (Detail)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2018
ARS ($)
$ / shares
shares
Dec. 31, 2017
ARS ($)
Dec. 31, 2016
ARS ($)
Dec. 31, 2018
$ / shares
Dec. 31, 2018
Bs. / shares
Dec. 31, 2015
ARS ($)
Disclosure of transactions between related parties [line items]            
Securities Face Value | $ / shares $ 10          
Book Value $ 32,698 $ 6,057        
Cost 1,573          
Net profit (loss) 38,606 12,672 $ (28,379)      
Equity 362,357 152,533 118,661     $ 120,461
Associates [member]            
Disclosure of transactions between related parties [line items]            
Book Value 2,533 987        
Cost $ 488          
Associates [member] | Oleoductos del Valle S.A [member]            
Disclosure of transactions between related parties [line items]            
Description of the Securities Class Common          
Securities Face Value | $ / shares $ 10.00          
Securities Amount | shares 4,072,749          
Book Value $ 710 242        
Main Business Oil transportation by pipeline          
Registered Address Florida 1, P. 10º, Buenos Aires, Argentina          
Last available financial statements Date Sep. 30, 2018          
Capital Stock $ 110          
Net profit (loss) 561          
Equity $ 1,044          
Holding in capital stock 37.00%          
Associates [member] | Terminales Maritimas Patagonicas S.A [member]            
Disclosure of transactions between related parties [line items]            
Description of the Securities Class Common          
Securities Face Value | $ / shares $ 10.00          
Securities Amount | shares 476,034          
Book Value $ 226 103        
Main Business Oil storage and shipment          
Registered Address Av. Leandro N. Alem 1180, P. 11º, Buenos Aires, Argentina          
Last available financial statements Date Sep. 30, 2018          
Capital Stock $ 14          
Net profit (loss) 364          
Equity $ 675          
Holding in capital stock 33.15%          
Associates [member] | Oiltanking Ebytem S.A [member]            
Disclosure of transactions between related parties [line items]            
Description of the Securities Class Common          
Securities Face Value | $ / shares $ 10.00          
Securities Amount | shares 351,167          
Book Value $ 424 211        
Main Business Hydrocarbon transportation and storage          
Registered Address Terminal Marítima Puerto Rosales - Provincia de Buenos Aires, Argentina.          
Last available financial statements Date Dec. 31, 2018          
Capital Stock $ 12          
Net profit (loss) 600          
Equity $ 1,396          
Holding in capital stock 30.00%          
Associates [member] | Gasoducto del Pacifico (Argentina) S.A. [member]            
Disclosure of transactions between related parties [line items]            
Description of the Securities Class Preferred          
Securities Face Value | $ / shares $ 1.00          
Securities Amount | shares 15,579,578          
Book Value $ 42 44        
Main Business Gas transportation by pipeline          
Registered Address San Martín 323, P.13°, Buenos Aires, Argentina          
Last available 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 S.A [member]            
Disclosure of transactions between related parties [line items]            
Description of the Securities Class Common          
Securities Face Value | $ / shares $ 0.01          
Securities Amount | shares 11,869,095,145          
Book Value $ 625          
Cost $ 280          
Main Business Electric power generation and bulk marketing          
Registered Address Pasaje Ingeniero Butty 220, P.16°, Buenos Aires, Argentina          
Last available financial statements Date Sep. 30, 2018          
Capital Stock $ 1,231          
Net profit (loss) 1,932          
Equity $ 4,330          
Holding in capital stock 10.25%          
Associates [member] | Oleoducto Trasandino (Argentina) S.A. [member]            
Disclosure of transactions between related parties [line items]            
Description of the Securities Class Preferred          
Securities Face Value | $ / shares $ 1.00          
Securities Amount | shares 12,135,167          
Book Value $ 60 41        
Main Business Oil transportation by pipeline          
Registered Address Macacha Güemes 515, P.3º, Buenos Aires, Argentina          
Last available financial statements Date Sep. 30, 2018          
Capital Stock $ 34          
Net profit (loss) 98          
Equity $ 223          
Holding in capital stock 36.00%          
Associates [member] | YPF Gas S.A [member]            
Disclosure of transactions between related parties [line items]            
Description of the Securities Class Common          
Securities Face Value | $ / shares $ 1.00          
Securities Amount | shares 59,821,434          
Book Value $ 258 235        
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 available financial statements Date Sep. 30, 2018          
Capital Stock $ 176          
Net profit (loss) 134          
Equity $ 951          
Holding in capital stock 33.99%          
Associates [member] | Other Related Parties [member]            
Disclosure of transactions between related parties [line items]            
Description of the Securities Class -          
Book Value $ 188 111        
Cost $ 208          
Registered Address -          
Joint Ventures [member]            
Disclosure of transactions between related parties [line items]            
Book Value $ 30,165 5,070        
Cost 1,085          
Net profit (loss) $ 3,814 885 $ 363      
Joint Ventures [member] | YPF Energia Electrica S.A [member]            
Disclosure of transactions between related parties [line items]            
Description of the Securities Class Common          
Securities Face Value | $ / shares $ 1          
Securities Amount | shares 1,879,916,921          
Book Value $ 19,320          
Cost $ 1,085          
Main Business Exploration, mining and marketing of hydrocarbons and generation, transport and marketing of electric energy          
Registered Address Macacha Güemes 515, Buenos Aires, Argentina          
Last available financial statements Date Sep. 30, 2018          
Capital Stock $ 3,747          
Net profit (loss) 1,812          
Equity $ 24,569          
Holding in Capital Stock 75.00%          
Joint Ventures [member] | Compania Mega S.A [member]            
Disclosure of transactions between related parties [line items]            
Description of the Securities Class Common          
Securities Face Value | $ / shares $ 1          
Securities Amount | shares 244,246,140          
Book Value $ 3,405 1,725        
Main Business Separation, fractionation and transportation of natural gas liquids          
Registered Address San Martín 344, P. 10º, Buenos Aires, Argentina          
Last available financial statements Date Dec. 31, 2018          
Capital Stock $ 643          
Net profit (loss) 953          
Equity $ 8,718          
Holding in Capital Stock 38.00%          
Joint Ventures [member] | Profertil S.A [member]            
Disclosure of transactions between related parties [line items]            
Description of the Securities Class Common          
Securities Face Value | $ / shares $ 1          
Securities Amount | shares 391,291,320          
Book Value $ 6,133 2,862        
Main Business Production and marketing of fertilizers          
Registered Address Alicia Moreau de Justo 740, P. 3, Buenos Aires, Argentina          
Last available financial statements Date Sep. 30, 2018          
Capital Stock $ 783          
Net profit (loss) (542)          
Equity $ 1,054          
Holding in Capital Stock 50.00%          
Joint Ventures [member] | Refinera Del Norte S.A [member]            
Disclosure of transactions between related parties [line items]            
Description of the Securities Class Common          
Securities Face Value | $ / shares $ 1          
Securities Amount | shares 45,803,655          
Book Value $ 1,307 $ 483        
Main Business Refining          
Registered Address Maipú 1, P. 2º, Buenos Aires, Argentina          
Last available financial statements Date Sep. 30, 2018          
Capital Stock $ 92          
Net profit (loss) (113)          
Equity $ 968          
Holding in Capital Stock 50.00%          
Subsidiaries [member] | YPF International S.A. [member]            
Disclosure of transactions between related parties [line items]            
Description of the Securities Class Common          
Securities Face Value | Bs. / shares         Bs. 100  
Securities Amount | shares 66,897          
Main Business Investment          
Registered Address Calle La Plata 19, Santa Cruz de la Sierra, República de Bolivia          
Last available financial statements Date Dec. 31, 2018          
Capital Stock $ 15          
Net profit (loss) (2)          
Equity $ 52          
Holding in Capital Stock 100.00%          
Subsidiaries [member] | YPF Holdings Inc. [member]            
Disclosure of transactions between related parties [line items]            
Description of the 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 available financial statements Date Dec. 31, 2018          
Capital Stock $ 30,475          
Net profit (loss) (415)          
Equity $ (8,075)          
Holding in Capital Stock 100.00%          
Subsidiaries [member] | Operadora de Estaciones de Servicios S.A.[member]            
Disclosure of transactions between related parties [line items]            
Description of the 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 available financial statements Date Dec. 31, 2018          
Capital Stock $ 164          
Net profit (loss) 993          
Equity $ 2,017          
Holding in Capital Stock 99.99%          
Subsidiaries [member] | A-Evangelista S.A. [member]            
Disclosure of transactions between related parties [line items]            
Description of the 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 available financial statements Date Dec. 31, 2018          
Capital Stock $ 307          
Net profit (loss) (373)          
Equity $ 1,780          
Holding in Capital Stock 100.00%          
Subsidiaries [member] | Metrogas S.A. [member]            
Disclosure of transactions between related parties [line items]            
Description of the 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 available financial statements Date Dec. 31, 2018          
Capital Stock $ 569          
Net profit (loss) (6)          
Equity $ 13,322          
Holding in Capital Stock 70.00%          
Subsidiaries [member] | YPF Chile S.A. [member]            
Disclosure of transactions between related parties [line items]            
Description of the 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 available financial statements Date Dec. 31, 2018          
Capital Stock $ 1,717          
Net profit (loss) (475)          
Equity $ 2,171          
Holding in Capital Stock 100.00%          
Subsidiaries [member] | YPF Tecnologia S.A [member]            
Disclosure of transactions between related parties [line items]            
Description of the 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 available financial statements Date Dec. 31, 2018          
Capital Stock $ 459          
Net profit (loss) (21)          
Equity $ 1,485          
Holding in Capital Stock 51.00%          
Subsidiaries [member] | Compania de Inversiones Mineras S.A. [Member]            
Disclosure of transactions between related parties [line items]            
Description of the 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 available financial statements Date Dec. 31, 2018          
Capital Stock $ 236          
Net profit (loss) (92)          
Equity $ 312          
Holding in Capital Stock 100.00%          
Subsidiaries [member] | Bajo Del Toro II S.R.L [member]            
Disclosure of transactions between related parties [line items]            
Description of the Securities Class Quotas          
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 available financial statements Date Dec. 31, 2018          
Capital Stock $ 1,271          
Net profit (loss) 152          
Equity $ 2,131          
Holding in Capital Stock 100.00%