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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, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of balance and transactions with related parties [line items]      
Other receivables Current $ 34,369 $ 36,192 $ 21,867
Trade receivables Current 108,146 118,077 72,646
Accounts payable Current 144,383 148,595 84,225
Revenues 669,186 678,595 435,820
Purchases and services 626,212 575,608 359,570
Current contract liabilities 6,824 7,404 4,996
Joint ventures [Member]      
Disclosure of balance and transactions with related parties [line items]      
Other receivables Current 480 364 2,115
Trade receivables Current 4,669 6,898 5,493
Accounts payable Current 3,494 2,840 1,891
Revenues 24,031 23,496 15,786
Purchases and services 13,629 9,580 4,423
Net interest income (loss)   (16) 47
Current contract liabilities 56 679  
Associates [member]      
Disclosure of balance and transactions with related parties [line items]      
Other receivables Current 71 103 676
Trade receivables Current 491 1,469 982
Accounts payable Current 1,161 968 677
Revenues 3,526 4,620 2,486
Purchases and services 7,349 6,023 3,124
Net interest income (loss) 13 162 217
Joint Ventures and Associates [Member]      
Disclosure of balance and transactions with related parties [line items]      
Other receivables Current 551 467 2,791
Trade receivables Current 5,160 8,367 6,475
Accounts payable Current 4,655 3,808 2,568
Revenues 27,557 28,116 18,272
Purchases and services 20,978 15,603 7,547
Net interest income (loss) 13 146 264
Current contract liabilities 56 679  
CDS [member] | Associates [member]      
Disclosure of balance and transactions with related parties [line items]      
Trade receivables Current 144 1,063 518
Accounts payable Current 10    
Revenues 838 1,955 565
Purchases and services 8 1  
Net interest income (loss) 8    
YPF Gas [member] | Associates [member]      
Disclosure of balance and transactions with related parties [line items]      
Other receivables Current 51 90 637
Trade receivables Current 322 317 414
Accounts payable Current 180 73 62
Revenues 2,401 2,217 1,608
Purchases and services 345 252 104
Net interest income (loss) 3 162 217
Oldelval [member] | Associates [member]      
Disclosure of balance and transactions with related parties [line items]      
Trade receivables Current 1 77 34
Accounts payable Current 450 401 272
Revenues 57 238 103
Purchases and services 2,893 2,192 1,167
Net interest income (loss) 2    
Termap [member] | Associates [member]      
Disclosure of balance and transactions with related parties [line items]      
Accounts payable Current 182 182 102
Revenues     6
Purchases and services 1,309 1,302 666
OTA [member] | Associates [member]      
Disclosure of balance and transactions with related parties [line items]      
Other receivables Current 12 9 5
Accounts payable Current 9 14 14
Revenues 2 1 1
Purchases and services 76 80 47
OTC [member] | Associates [member]      
Disclosure of balance and transactions with related parties [line items]      
Other receivables Current 8 4 7
GPA [member] | Associates [member]      
Disclosure of balance and transactions with related parties [line items]      
Other receivables Current     4
Accounts payable Current 25 99 80
Purchases and services 1,176 845 363
Oiltanking [member] | Associates [member]      
Disclosure of balance and transactions with related parties [line items]      
Other receivables Current     21
Trade receivables Current 1    
Accounts payable Current 304 198 147
Revenues 5 3 4
Purchases and services 1,542 1,350 777
Gas Austral S.A. [member] | Associates [member]      
Disclosure of balance and transactions with related parties [line items]      
Other receivables Current     2
Trade receivables Current 23 12 16
Accounts payable Current 1 1  
Revenues 223 206 199
Purchases and services   1  
Profertil [member] | Joint ventures [Member]      
Disclosure of balance and transactions with related parties [line items]      
Other receivables Current 12 12 2
Trade receivables Current 641 587 461
Accounts payable Current 484 114 428
Revenues 5,111 4,418 2,751
Purchases and services 4,883 3,044 1,964
MEGA [Member] | Joint ventures [Member]      
Disclosure of balance and transactions with related parties [line items]      
Trade receivables Current 2,650 2,995 2,441
Accounts payable Current 261 350 6
Revenues 12,408 10,672 8,150
Purchases and services 2,281 1,854 438
Refinor [member] | Joint ventures [Member]      
Disclosure of balance and transactions with related parties [line items]      
Trade receivables Current 577 956 770
Accounts payable Current 75 123 5
Revenues 2,750 3,310 2,594
Purchases and services 706 481 323
Net interest income (loss)   (16)  
Bizoy SA [Member] | Joint ventures [Member]      
Disclosure of balance and transactions with related parties [line items]      
Other receivables Current     11
Trade receivables Current   17  
Y-GEN I [member] | Joint ventures [Member]      
Disclosure of balance and transactions with related parties [line items]      
Trade receivables Current     2
Revenues   5 4
YPF EE [member] | Joint ventures [Member]      
Disclosure of balance and transactions with related parties [line items]      
Other receivables Current 389 296 218
Trade receivables Current 794 2,278 1,552
Accounts payable Current 2,504 2,183 1,301
Revenues 3,647 5,016 2,064
Purchases and services 5,184 3,862 1,548
Net interest income (loss)     47
Current contract liabilities 56 679  
Petrofaro S.A. [member] | Joint ventures [Member]      
Disclosure of balance and transactions with related parties [line items]      
Trade receivables Current   6 267
Accounts payable Current     151
Revenues   9 223
Purchases and services   23 150
OLCLP [member] | Joint ventures [Member]      
Disclosure of balance and transactions with related parties [line items]      
Other receivables Current 79 56 $ 1,884
Trade receivables Current 7 59  
Accounts payable Current 168 70  
Revenues 115 66  
Purchases and services 571 $ 316  
Sustentator S.A. [member] | Joint ventures [Member]      
Disclosure of balance and transactions with related parties [line items]      
Accounts payable Current 2    
Purchases and services $ 4