Debt, Credit Facilities (Details)		Mar. 31, 2022 USD ($)	Mar. 31, 2022 CAD ($)	Dec. 31, 2021
Valero Revolver [Member] | Credit Facilities [Member]
Line of Credit Facility
Facility amount		$ 4,000,000,000
Outstanding borrowings, long term		0
Availability		3,385,000,000
Valero Revolver Letter of Credit [Member] | Credit Facilities [Member]
Line of Credit Facility
Letters of credit issued	[1]	615,000,000
Canadian Revolver [Member] | Credit Facilities [Member]
Line of Credit Facility
Facility amount			$ 150,000,000
Outstanding borrowings, short-term			0
Availability			$ 145,000,000
Canadian Revolver Letter of Credit [Member] | Credit Facilities [Member]
Line of Credit Facility
Letters of credit issued	[1]	5,000,000
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
Committed Letter of Credit Facility [Member] | Credit Facilities [Member]
Line of Credit Facility
Facility amount		50,000,000
Letters of credit issued	[1]	0
Availability		50,000,000
DGD Revolver [Member] | Credit Facilities [Member] | Diamond Green Diesel Holdings LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Line of Credit Facility
Facility amount	[2],[3]	400,000,000
Outstanding borrowings, long term	[2],[3]	100,000,000
Availability	[2],[3]	$ 285,000,000
Interest rate at period end (percent)		2.14%	2.14%	1.86%
DGD Revolver Letter Of Credit [Member] | Credit Facilities [Member] | Diamond Green Diesel Holdings LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Line of Credit Facility
Letters of credit issued	[1],[2],[3]	$ 15,000,000
DGD Loan Agreement [Member] | Credit Facilities [Member] | Diamond Green Diesel Holdings LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Valero Energy Corporation
Line of Credit Facility
Facility amount	[2],[4]	25,000,000
Outstanding borrowings, long term	[2],[4]	25,000,000
Availability	[2],[4]	$ 0
Interest rate at period end (percent)		2.735%	2.735%	2.603%
IEnova Revolver [Member] | Credit Facilities [Member] | Central Mexico Terminals [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Line of Credit Facility
Facility amount	[2],[5]	$ 830,000,000
Outstanding borrowings, long term	[2],[5]	692,000,000
Availability	[2],[5]	$ 138,000,000
Interest rate at period end (percent)		3.864%	3.864%	3.781%
Uncommitted Letter of Credit Facility [Member] | Credit Facilities [Member]
Line of Credit Facility
Letters of credit issued	[1]	$ 834,000,000

[1] Letters of credit issued as of March 31, 2022 expire at various times in 2022 through 2023.

[2] Creditors of the VIEs do not have recourse against us.

[3] The variable interest rate on the DGD Revolver was 2.140 percent and 1.860 percent as of March 31, 2022 and December 31, 2021, respectively.

[4] In March 2022, the maturity date of this facility was extended to April 2023. The amounts shown for this facility represent the facility amount available from, and borrowings outstanding to, the noncontrolling member as any transactions between DGD and us under this facility are eliminated in consolidation. The variable interest rate on the DGD Loan Agreement was 2.735 percent and 2.603 percent as of March 31, 2022 and December 31, 2021, respectively.

[5] The variable interest rate on the IEnova Revolver was 3.864 percent and 3.781 percent as of March 31, 2022 and December 31, 2021, respectively.