Debt and Finance Lease Obligations (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Feb. 28, 2022	Dec. 31, 2021	Nov. 30, 2021
Debt and Finance Lease Obligations:
Net unamortized debt issuance costs and other	$ (77)	$ (84)
Total debt	9,218	9,241
Finance lease obligations (see Note 5)	2,306	2,394
Total debt and finance lease obligations	11,524	11,635
Less: Current portion	1,406	1,109
Debt and finance lease obligations, less current portion	10,118	10,526
Other Debt [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	14	19
Valero Revolver [Member] | Credit Facilities [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	0	0
Canadian Revolver [Member] | Credit Facilities [Member]
Short-term Debt [Abstract]
Short-term debt at stated values		0
Accounts Receivable Sales Facility [Member] | Credit Facilities [Member]
Short-term Debt [Abstract]
Short-term debt at stated values	0	0
DGD Revolver [Member] | Credit Facilities [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	250	100
DGD Loan Agreement [Member] | Credit Facilities [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	0	25
IEnova Revolver [Member] | Credit Facilities [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	766	717
1.200% Valero Senior Notes Due 2024 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 167	167
Interest rate of notes (percent)	1.20%				1.20%
2.850% Valero Senior Notes Due 2025 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 251	251
Interest rate of notes (percent)	2.85%		2.85%	2.85%
3.65% Valero Senior Notes Due 2025 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 189	189
Interest rate of notes (percent)	3.65%		3.65%	3.65%	3.65%
3.400% Valero Senior Notes Due 2026 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 426	426
Interest rate of notes (percent)	3.40%		3.40%	3.40%
2.150% Valero Senior Notes Due 2027 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 564	$ 578
Interest rate of notes (percent)	2.15%	2.15%
4.350% Valero Senior Notes Due 2028 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 591	$ 606
Interest rate of notes (percent)	4.35%		4.35%
4.000% Valero Senior Notes Due 2029 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 439	439
Interest rate of notes (percent)	4.00%		4.00%
8.75% Valero Senior Notes Due 2030 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 200	200
Interest rate of notes (percent)	8.75%
2.800% Valero Senior Notes Due 2031 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 462	$ 472
Interest rate of notes (percent)	2.80%	2.80%				2.80%
7.5% Valero Senior Notes Due in 2032 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 729	$ 733
Interest rate of notes (percent)	7.50%
6.625% Valero Senior Notes Due 2037 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 1,380	$ 1,442
Interest rate of notes (percent)	6.625%	6.625%
6.75% Valero Senior Notes Due in 2037 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 24	$ 24
Interest rate of notes (percent)	6.75%
10.500% Valero Senior Notes Due 2039 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 113	113
Interest rate of notes (percent)	10.50%				10.50%
4.90% Valero Senior Notes Due 2045 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 621	$ 626
Interest rate of notes (percent)	4.90%	4.90%
3.650% Valero Senior Notes Due 2051 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 829	$ 855
Interest rate of notes (percent)	3.65%	3.65%				3.65%
4.000% Valero Senior Notes Due 2052 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 508	$ 553
Interest rate of notes (percent)	4.00%	4.00%		4.00%
7.45% Valero Senior Notes Due 2097 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 70	$ 70
Interest rate of notes (percent)	7.45%	7.45%
4.375% VLP Senior Notes Due 2026 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 146	$ 146
Interest rate of notes (percent)	4.375%		4.375%	4.375%	4.375%
4.500% VLP Senior Notes Due March 2028 [Member] | Senior Notes [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 456	$ 474
Interest rate of notes (percent)	4.50%	4.50%
Debenture, 7.65% Due In 2026 [Member] | Debenture [Member]
Debt Instruments [Abstract]
Long-term debt at stated values	$ 100	$ 100
Interest rate of notes (percent)	7.65%