XML 107 R89.htm IDEA: XBRL DOCUMENT
v3.20.4

Income Taxes, Schedule of Statutory Tax Rates (Details) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Statutory Tax Rates |  |  |
Applicable statutory income tax rate (percent) | 22.10% | 19.20% | 19.60%
U.S. [Member] |  |  |
Statutory Tax Rates |  |  |
Applicable statutory income tax rate (percent) | 21.00% | 21.00% | 21.00%
Canada [Member] |  |  |
Statutory Tax Rates |  |  |
Applicable statutory income tax rate (percent) | 15.00% | 15.00% | 15.00%
U.K. [Member] |  |  |
Statutory Tax Rates |  |  |
Applicable statutory income tax rate (percent) | 19.00% | 19.00% | 19.00%
Ireland [Member] |  |  |
Statutory Tax Rates |  |  |
Applicable statutory income tax rate (percent) | 13.00% | 13.00% | 13.00%
Peru [Member] |  |  |
Statutory Tax Rates |  |  |
Applicable statutory income tax rate (percent) | 30.00% | 30.00% | 30.00%
Mexico [Member] |  |  |
Statutory Tax Rates |  |  |
Applicable statutory income tax rate (percent) | 30.00% | 30.00% | 30.00%

X
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
Name: | us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Statutory Tax Rates [Abstract] + References No definition available. + Details
Name: | vlo_StatutoryTaxRatesAbstract
Namespace Prefix: | vlo_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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

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

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

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

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