Basis of Presentation and Significant Accounting Policies	6 Months Ended
	Jun. 30, 2026
Accounting Policies [Abstract]
BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES	1. BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation General The terms “Valero,” “we,” “our,” and “us,” as used in this report, may refer to Valero Energy Corporation, one or more of its consolidated subsidiaries, or all of them taken as a whole. The term “DGD,” as used in this report, may refer to Diamond Green Diesel Holdings LLC, its wholly owned consolidated subsidiary, or both of them taken as a whole. These interim unaudited financial statements were prepared in conformity with United States (U.S.) generally accepted accounting principles (GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X of the Securities Exchange Act of 1934. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, these interim unaudited financial statements reflect all adjustments considered necessary for a fair statement of our results for the interim periods presented. All such adjustments are of a normal recurring nature unless otherwise disclosed. Operating results for the interim periods are not necessarily indicative of the results that may be expected for the year ending December 31, 2026. These interim unaudited financial statements should be read in conjunction with our audited financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2025. The balance sheet as of December 31, 2025, has been derived from our audited financial statements as of that date. For further information, refer to our audited financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2025. Reclassifications Certain prior year amounts have been reclassified to conform to the 2026 presentation. The changes were due to the separate presentation of (i) taxes other than income taxes, which were previously included in cost of materials and other in our statements of income and (ii) changes in deferred charges and other assets and changes in long-term liabilities, which were previously included in “changes in deferred charges and credits and other operating activities, net” in our statements of cash flows. In addition, prior year amounts that were presented separately for activities related to investments in available-for-sale (AFS) debt securities have been reclassified to “other investing activities, net” in our statements of cash flows. Significant Accounting Policies Use of Estimates The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported in these interim unaudited financial statements and accompanying notes. Actual results could differ from those estimates. On an ongoing basis, we review our estimates based on currently available information. Changes in facts and circumstances may result in revised estimates. Accounting Pronouncement Not Yet Adopted ASU 2026-02 In May 2026, the Financial Accounting Standards Board issued Accounting Standards Update (ASU) 2026-02, Environmental Credits and Environmental Credit Obligations (Topic 818), which provides guidance on the accounting for environmental credit assets and related obligations. This ASU establishes recognition, measurement, presentation, and disclosure requirements for entities that generate, purchase, or receive environmental credits or have regulatory compliance obligations that may be settled with such credits. We expect to adopt this ASU effective January 1, 2028. We are currently evaluating the effect that adopting this ASU will have on our financial position, results of operations, and related disclosures.