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Contractual Commitments - Summary of detailed information about operating lease rental expense (Detail) - Operating lease commitments [Member] $ in Millions | 12 Months Ended
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Dec. 31, 2018 ARS ($)
Disclosure of geographical areas [line items] |
Minimum payments | $ 4,988
Contingent installments | 7,326
Rental expenses related to operating leases | $ 12,314

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfGeographicalAreasLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Contingent rents recognized as expense classified as operating lease. + References No definition available. + Details
Name: | ypf_ContingentRentsRecognizedAsExpenseClassifiedAsOperatingLease
Namespace Prefix: | ypf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Minimum operating leases payment. + References No definition available. + Details
Name: | ypf_MinimumOperatingLeasesPayment
Namespace Prefix: | ypf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Renal expense related to operating lease. + References No definition available. + Details
Name: | ypf_RenalExpenseRelatedToOperatingLease
Namespace Prefix: | ypf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ypf_OperatingLeaseCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |