Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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- Definition

The cash outflow for the extinguishment of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, before its maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

Name:	us-gaap_EarlyRepaymentOfSeniorDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

+ Details

Name:	us-gaap_RepaymentsOfLongTermLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates.

+ References

+ Details

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Debt and Finance Lease Obligations, Public Debt (Details) - USD ($)	1 Months Ended	6 Months Ended	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Apr. 30, 2020
Senior Notes [Member]
Public Debt (Textual)
Proceeds from issuance of senior long-term debt		$ 4,020,000,000.000
Senior Notes [Member] \| Floating Rate Senior Notes Due September 15, 2023 [Member]
Public Debt (Textual)
Face amount of long-term debt issuance	$ 575,000,000	575,000,000
Senior Notes [Member] \| Floating Rate Senior Notes Due September 15, 2023 [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Public Debt (Textual)
Basis spread on variable rate	1.15%
Senior Notes [Member] \| Senior Notes Due March 15, 2024 [Member]
Public Debt (Textual)
Face amount of long-term debt issuance	$ 925,000,000	$ 925,000,000
Interest rate of notes (percent)	1.20%	1.20%			1.20%
Senior Notes [Member] \| Senior Notes Due April 15, 2025, Issued September 2020 [Member]
Public Debt (Textual)
Face amount of long-term debt issuance	$ 400,000,000	$ 400,000,000
Interest rate of notes (percent)	2.85%	2.85%
Senior Notes [Member] \| Senior Notes Due April 15, 2025, Issued April 2020 [Member]
Public Debt (Textual)
Face amount of long-term debt issuance						$ 650,000,000
Interest rate of notes (percent)						2.85%
Senior Notes [Member] \| Senior Notes Due September 15, 2027 [Member]
Public Debt (Textual)
Face amount of long-term debt issuance	$ 600,000,000	$ 600,000,000
Interest rate of notes (percent)	2.15%	2.15%			2.15%
Senior Notes [Member] \| Senior Notes Due April 15, 2023 [Member]
Public Debt (Textual)
Face amount of long-term debt issuance						$ 850,000,000
Interest rate of notes (percent)					2.70%	2.70%
Senior Notes [Member] \| Senior Notes due April 1, 2029 [Member]
Public Debt (Textual)
Face amount of long-term debt issuance			$ 1,000,000,000
Interest rate of notes (percent)			4.00%		4.00%
Proceeds from issuance of senior long-term debt			$ 992,000,000
Senior Notes [Member] \| Senior Notes Due February 1, 2020 [Member]
Public Debt (Textual)
Interest rate of notes (percent)			6.125%
Early repayment of senior debt			$ 871,000,000
Debt instrument, redemption price, percentage of principal amount redeemed (percent)			102.48%
Early redemption fee			$ 21,000,000
Senior Notes [Member] \| VLP Senior Notes Due December 15, 2026 [Member]
Public Debt (Textual)
Interest rate of notes (percent)					4.375%
Senior Notes [Member] \| VLP Senior Notes Due December 15, 2026 [Member] \| Valero Energy Partners LP [Member]
Public Debt (Textual)
Face amount of long-term debt issuance			$ 500,000,000
Interest rate of notes (percent)			4.375%
Senior Notes [Member] \| VLP Senior Notes Due March 15, 2028 [Member]
Public Debt (Textual)
Interest rate of notes (percent)					4.50%
Senior Notes [Member] \| VLP Senior Notes Due March 15, 2028 [Member] \| Valero Energy Partners LP [Member]
Public Debt (Textual)
Face amount of long-term debt issuance			$ 500,000,000	$ 500,000,000
Interest rate of notes (percent)			4.50%	4.50%
Proceeds from issuance of senior long-term debt				$ 498,000,000
Senior Notes [Member] \| Senior Notes Due June 1, 2028 [Member]
Public Debt (Textual)
Face amount of long-term debt issuance				$ 750,000,000
Interest rate of notes (percent)				4.35%	4.35%
Proceeds from issuance of senior long-term debt				$ 749,000,000
Senior Notes [Member] \| Senior Notes Due March 15, 2019 [Member]
Public Debt (Textual)
Interest rate of notes (percent)				9.375%
Early repayment of senior debt				$ 787,000,000
Debt instrument, redemption price, percentage of principal amount redeemed (percent)				104.90%
Early redemption fee				$ 37,000,000
Credit Facilities [Member] \| Valero Energy Partners LP [Member] \| VLP Revolver [Member]
Public Debt (Textual)
Repayments of outstanding amounts under the VLP Revolver				410,000,000
Subordinated Debt [Member] \| VLP Subordinated Notes [Member] [Member] \| Valero Energy Partners LP [Member]
Public Debt (Textual)
Repayments of notes payable - related party				$ 85,000,000