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Acquisitions and Dispositions - Summary of Capital Structure After Issuance of Shares (Detail) - YPF EE [member] - shares
 12 Months Ended
Mar. 20, 2018
Dec. 31, 2017
Disclosure of classes of share capital [line items]    
Number of Shares   3,747,070,355
Interest holding in the capital stock 100.00%  
YPF [member]    
Disclosure of classes of share capital [line items]    
Number of Shares   2,723,826,879
Interest holding in the capital stock 72.69218%  
Kind of Share   A
OPESSA [member]    
Disclosure of classes of share capital [line items]    
Number of Shares   86,476,112
Interest holding in the capital stock 2.30783%  
Kind of Share   A
Group [member]    
Disclosure of classes of share capital [line items]    
Number of Shares   2,810,302,991
Interest holding in the capital stock 75.00001%  
Kind of Share   A
GE [member]    
Disclosure of classes of share capital [line items]    
Number of Shares   936,767,364
Interest holding in the capital stock 24.99999%  
Kind of Share   B