Variable Interest Entities (Details) (Narrative)	Mar. 31, 2025 plant subsidiary
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

Number Of Renewable Diesel Plants Owned By Joint Venture

No definition available.

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