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Contractual Commitments - Summary of estimated minimum payment commitments related to non-cancellable operating lease (Detail) - ARS ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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0 to 1 year [member] |  |
Disclosure of maturity analysis of operating lease payments [line items] |  |
Estimated minimum payment commitments under non-cancellable operating leases | $ 12,264 | $ 5,480
From 1 to 5 years [member] |  |
Disclosure of maturity analysis of operating lease payments [line items] |  |
Estimated minimum payment commitments under non-cancellable operating leases | 15,341 | 4,265
More than 5 years [member] |  |
Disclosure of maturity analysis of operating lease payments [line items] |  |
Estimated minimum payment commitments under non-cancellable operating leases | $ 2,317 | $ 504

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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_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Expected future minimum sublease payment receivables under noncancellable subleases classified as operating lease. + References No definition available. + Details
Name: | ypf_ExpectedFutureMinimumSubleasePaymentReceivablesUnderNoncancellableSubleasesClassifiedAsOperatingLease
Namespace Prefix: | ypf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |