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Variable Interest Entities (Details) (Narrative)	Sep. 30, 2024 subsidiary plant
Diamond Green Diesel Holdings LLC (DGD) [Member]
Variable Interest Entity (Textual)
Number of renewable diesel plants owned by joint venture | plant	2
Central Mexico Terminals [Member]
Variable Interest Entity (Textual)
Number of subsidiaries | subsidiary	3

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- Definition

Number Of Renewable Diesel Plants Owned By Joint Venture

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No definition available.

+ Details

Name:	vlo_NumberOfRenewableDieselPlantsOwnedByJointVenture
Namespace Prefix:	vlo_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number Of Subsidiaries

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No definition available.

+ Details

Name:	vlo_NumberOfSubsidiaries
Namespace Prefix:	vlo_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

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- Definition

Variable Interest Entity Textual

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No definition available.

+ Details

Name:	vlo_VariableInterestEntityTextualAbstract
Namespace Prefix:	vlo_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Details

Name:	srt_ConsolidatedEntitiesAxis=vlo_VariableInterestEntityPrimaryBeneficiaryDiamondGreenDieselHoldingsLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=vlo_VariableInterestEntityPrimaryBeneficiaryCentralMexicoTerminalsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: