Debt and Finance Lease Obligations, Credit Facilities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2025	Oct. 31, 2025
Credit Facilities (Textual)
Increase in noncontrolling interest, conversion of IEnova Revolver debt to equity	$ 732,000,000
Valero Revolver [Member] | Credit Facilities [Member]
Line of Credit Facility
Facility amount		$ 4,000,000,000	$ 4,000,000,000
Outstanding borrowings, long term		0
Availability		3,998,000,000
Credit Facilities (Textual)
Facility amount		4,000,000,000	4,000,000,000
Option to increase aggregate commitments under line of credit facility, increase limit, subject to certain restrictions			5,500,000,000
Valero Revolver Letter of Credit [Member] | Credit Facilities [Member]
Line of Credit Facility
Facility amount			2,400,000,000
Letters of credit issued		2,000,000
Credit Facilities (Textual)
Facility amount			$ 2,400,000,000
Accounts Receivable Sales Facility [Member] | Credit Facilities [Member]
Line of Credit Facility
Facility amount		1,300,000,000
Outstanding borrowings, short-term		0
Availability		1,300,000,000
Credit Facilities (Textual)
Facility amount		1,300,000,000
Designated pool of accounts receivable	2,500,000,000	2,700,000,000
DGD Revolver [Member] | Credit Facilities [Member] | DGD [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Line of Credit Facility
Facility amount		400,000,000
Outstanding borrowings, long term		0
Availability		371,000,000
Credit Facilities (Textual)
Facility amount		400,000,000
Option to increase aggregate commitments under line of credit facility, increase limit, subject to certain restrictions		550,000,000
DGD Revolver Letter of Credit [Member] | Credit Facilities [Member] | DGD [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Line of Credit Facility
Facility amount		150,000,000
Letters of credit issued		29,000,000
Credit Facilities (Textual)
Facility amount		150,000,000
DGD Loan Agreement [Member] | Credit Facilities [Member] | DGD [Member] | Darling Ingredients Inc. [Member]
Line of Credit Facility
Facility amount		100,000,000
Credit Facilities (Textual)
Facility amount		100,000,000
DGD Loan Agreement [Member] | Credit Facilities [Member] | DGD [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Line of Credit Facility
Facility amount		200,000,000
Credit Facilities (Textual)
Facility amount		200,000,000
DGD Loan Agreement [Member] | Credit Facilities [Member] | DGD [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Valero Energy Corporation [Member]
Line of Credit Facility
Facility amount		100,000,000
Outstanding borrowings, long term		0
Availability		100,000,000
Credit Facilities (Textual)
Facility amount		100,000,000
IEnova Revolver [Member] | Credit Facilities [Member] | Central Mexico Terminals [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Line of Credit Facility
Facility amount		1,000,000,000
Outstanding borrowings, long term		23,000,000
Availability		977,000,000
Credit Facilities (Textual)
Facility amount		$ 1,000,000,000
Debt conversion, debt amount converted	$ 732,000,000
Interest rate at period end (percent)	8.443%	7.835%
Uncommitted Letter of Credit Facility [Member] | Credit Facilities [Member]
Line of Credit Facility
Letters of credit issued		$ 7,000,000
Uncommitted Letter of Credit Facility [Member] | Credit Facilities [Member] | DGD [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Line of Credit Facility
Letters of credit issued		$ 66,000,000