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v3.23.1

Uncertainty (Details) | 3 Months Ended
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Mar. 31, 2023 refinery
California [Member] |
Concentration Risk [Line Items] |
Number of refineries | 2

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

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- Definition Number Of Refineries + References No definition available. + Details
Name: | vlo_NumberOfRefineries
Namespace Prefix: | vlo_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_StatementGeographicalAxis=stpr_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |