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Costs - Detailed Information of Inventory Costs (Parenthetical) (Detail) - ARS ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of details of inventory costs [abstract]
Reclassification of inventory	$ 142	$ 12	$ 85

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- Definition

Disclosure of details of inventory costs.

+ References

No definition available.

+ Details

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- Definition

Reclassification of inventory in accordance with change in accounting policy

+ References

No definition available.

+ Details

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Namespace Prefix:	ypf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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