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Balances and Transactions with Related Parties - Information Detailed in the Tables below Shows the Balances with Associates and Joint Ventures (Detail) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of transactions between related parties [line items]      
Other receivables Current $ 21,867 $ 12,684 $ 13,456
Trade receivables Current 72,646 40,649 33,645
Accounts payable Current 84,225 45,911 41,581
Revenues 435,820 252,813 210,100
Purchases and services 359,570 211,812 177,304
Joint ventures [Member]      
Disclosure of transactions between related parties [line items]      
Other receivables Current 2,115 191 106
Trade receivables Current 5,493 1,423 1,257
Accounts payable Current 1,891 423 218
Revenues 15,786 5,911 4,634
Purchases and services 4,423 1,998 1,090
Net interest income (loss) 47 10 3
Associates [member]      
Disclosure of transactions between related parties [line items]      
Other receivables Current 676 600 41
Trade receivables Current 982 359 483
Accounts payable Current 677 318 246
Revenues 2,486 1,044 1,340
Purchases and services 3,124 1,669 1,303
Net interest income (loss) 217 51 38
Joint Ventures and Associates [Member]      
Disclosure of transactions between related parties [line items]      
Other receivables Current 2,791 791 147
Trade receivables Current 6,475 1,782 1,740
Accounts payable Current 2,568 741 464
Revenues 18,272 6,955 5,974
Purchases and services 7,547 3,667 2,393
Net interest income (loss) 264 61 41
CDS [member] | Associates [member]      
Disclosure of transactions between related parties [line items]      
Trade receivables Current 518 122 108
Revenues 565 102 579
Net interest income (loss)     38
YPF Gas [member] | Associates [member]      
Disclosure of transactions between related parties [line items]      
Other receivables Current 637 589 35
Trade receivables Current 414 230 375
Accounts payable Current 62 15 35
Revenues 1,608 863 761
Purchases and services 104 51 41
Net interest income (loss) 217 51  
Oldelval [member] | Associates [member]      
Disclosure of transactions between related parties [line items]      
Trade receivables Current 34    
Accounts payable Current 272 131 81
Revenues 103    
Purchases and services 1,167 596 408
Termap [member] | Associates [member]      
Disclosure of transactions between related parties [line items]      
Accounts payable Current 102 52 44
Revenues 6    
Purchases and services 666 366 309
OTA [member] | Associates [member]      
Disclosure of transactions between related parties [line items]      
Other receivables Current 5    
Accounts payable Current 14 5 5
Revenues 1    
Purchases and services 47 25 25
OTC [member] | Associates [member]      
Disclosure of transactions between related parties [line items]      
Other receivables Current 7 5 2
Gasoducto del Pacifico (Argentina) S.A. [member] | Associates [member]      
Disclosure of transactions between related parties [line items]      
Other receivables Current 4 4 4
Accounts payable Current 80 19 31
Purchases and services 363 202 170
Oiltanking [member] | Associates [member]      
Disclosure of transactions between related parties [line items]      
Other receivables Current 21    
Accounts payable Current 147 96 50
Revenues 4 1  
Purchases and services 777 428 350
Gas Austral S.A. [member] | Associates [member]      
Disclosure of transactions between related parties [line items]      
Other receivables Current 2 2  
Trade receivables Current 16 7  
Revenues 199 78  
Purchases and services   1  
Profertil [member] | Joint ventures [Member]      
Disclosure of transactions between related parties [line items]      
Other receivables Current 2 107 97
Trade receivables Current 461 239 162
Accounts payable Current 428 215 99
Revenues 2,751 906 956
Purchases and services 1,964 901 620
MEGA [Member] | Joint ventures [Member]      
Disclosure of transactions between related parties [line items]      
Trade receivables Current 2,441 925 797
Accounts payable Current 6 149 80
Revenues 8,150 4,058 2,673
Purchases and services 438 814 337
Refinor [member] | Joint ventures [Member]      
Disclosure of transactions between related parties [line items]      
Trade receivables Current 770 224 296
Accounts payable Current 5 8 39
Revenues 2,594 838 998
Purchases and services 323 225 133
Net interest income (loss)   10 3
Bizoy SA [Member] | Joint ventures [Member]      
Disclosure of transactions between related parties [line items]      
Other receivables Current 11 5 9
Revenues   1 5
Y-GEN I [member] | Joint ventures [Member]      
Disclosure of transactions between related parties [line items]      
Other receivables Current   57  
Trade receivables Current 2   2
Revenues 4 34 $ 2
Y-GEN II [member] | Joint ventures [Member]      
Disclosure of transactions between related parties [line items]      
Other receivables Current   22  
Revenues   41  
YPF EE [member] | Joint ventures [Member]      
Disclosure of transactions between related parties [line items]      
Other receivables Current 218    
Trade receivables Current 1,552    
Accounts payable Current 1,301    
Revenues 2,064    
Purchases and services 1,548    
Net interest income (loss) 47    
Petrofaro S.A. [member] | Joint ventures [Member]      
Disclosure of transactions between related parties [line items]      
Trade receivables Current 267 35  
Accounts payable Current 151 51  
Revenues 223 33  
Purchases and services 150 $ 58  
Oleoducto Loma Campana-Lago Pellegrini S.A [member] | Joint ventures [Member]      
Disclosure of transactions between related parties [line items]      
Other receivables Current $ 1,884