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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
	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

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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.

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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: