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Debt and Finance Lease Obligations, Public Debt (Details) - USD ($) |  |  | 1 Months Ended | 2 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Feb. 17, 2022 | Feb. 07, 2022 | Nov. 30, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2021 | Sep. 30, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Apr. 30, 2020
Public Debt (Textual) |  |  |  |  |  |  |  |  |  |  |
Loss on early redemption and retirement of debt |  |  |  |  |  |  |  | $ 193,000,000 | $ 0 | $ 22,000,000 |
Premiums paid |  |  |  |  |  |  |  | $ 179,000,000 | $ 0 | $ 21,000,000 |
Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Debt repurchased and retired, or redeemed amount |  |  |  |  |  | $ 2,143,000,000 |  |  |  |  |
Public Debt (Textual) |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of senior long-term debt |  |  | $ 1,446,000,000 |  |  |  | $ 4,020,000,000.00 |  |  |  |
Loss on early redemption and retirement of debt |  |  |  |  |  | 193,000,000 |  |  |  |  |
Premiums paid |  |  |  |  |  | 179,000,000 |  |  |  |  |
Write-off of unamortized debt discounts and deferred debt costs |  |  |  |  |  | 10,000,000 |  |  |  |  |
Bank fees |  |  |  |  |  | $ 4,000,000 |  |  |  |  |
Senior Notes [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Debt repurchased and retired, or redeemed amount | $ 1,400,000,000 |  |  |  |  |  |  |  |  |  |
Public Debt (Textual) |  |  |  |  |  |  |  |  |  |  |
Premiums paid | 48,000,000 |  |  |  |  |  |  |  |  |  |
Senior Notes [Member] | 2.800% Valero Senior Notes Due December 1, 2031 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Interest rate of notes (percent) |  |  | 2.80% |  |  | 2.80% |  | 2.80% |  |  |
Public Debt (Textual) |  |  |  |  |  |  |  |  |  |  |
Face amount of long-term debt issuance |  |  | $ 500,000,000 |  |  |  |  |  |  |  |
Senior Notes [Member] | 3.650% Valero Senior Notes Due December 1, 2051 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Interest rate of notes (percent) |  |  | 3.65% |  |  | 3.65% |  | 3.65% |  |  |
Public Debt (Textual) |  |  |  |  |  |  |  |  |  |  |
Face amount of long-term debt issuance |  |  | $ 950,000,000 |  |  |  |  |  |  |  |
Senior Notes [Member] | 2.700% Valero Senior Notes Due in 2023 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Interest rate of notes (percent) |  |  |  |  |  | 2.70% |  | 2.70% |  |  | 2.70%
Debt repurchased and retired, or redeemed amount |  |  |  |  |  | $ 850,000,000 |  |  |  |  |
Public Debt (Textual) |  |  |  |  |  |  |  |  |  |  |
Face amount of long-term debt issuance |  |  |  |  |  |  |  |  |  |  | $ 850,000,000
Senior Notes [Member] | 1.200% Valero Senior Notes Due in 2024 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Interest rate of notes (percent) |  |  |  |  | 1.20% | 1.20% | 1.20% | 1.20% |  |  |
Debt repurchased and retired, or redeemed amount |  |  |  |  |  | $ 756,000,000 |  |  |  |  |
Public Debt (Textual) |  |  |  |  |  |  |  |  |  |  |
Face amount of long-term debt issuance |  |  |  |  | $ 925,000,000 |  | $ 925,000,000 |  |  |  |
Senior Notes [Member] | 3.65% Valero Senior Notes Due in 2025 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Interest rate of notes (percent) |  |  |  |  |  | 3.65% |  | 3.65% |  |  |
Debt repurchased and retired, or redeemed amount |  |  |  |  |  | $ 276,000,000 |  |  |  |  |
Senior Notes [Member] | 3.65% Valero Senior Notes Due in 2025 [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Debt repurchased and retired, or redeemed amount | 72,000,000 |  |  |  |  |  |  |  |  |  |
Senior Notes [Member] | 4.375% VLP Senior Notes Due in 2026 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Interest rate of notes (percent) |  |  |  |  |  | 4.375% |  | 4.375% |  |  |
Debt repurchased and retired, or redeemed amount |  |  |  |  |  | $ 124,000,000 |  |  |  |  |
Senior Notes [Member] | 4.375% VLP Senior Notes Due in 2026 [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Debt repurchased and retired, or redeemed amount | 168,000,000 |  |  |  |  |  |  |  |  |  |
Senior Notes [Member] | 4.375% VLP Senior Notes Due in 2026 [Member] | Valero Energy Partners LP [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Interest rate of notes (percent) |  |  |  |  |  |  |  |  |  | 4.375% |
Public Debt (Textual) |  |  |  |  |  |  |  |  |  |  |
Face amount of long-term debt issuance |  |  |  |  |  |  |  |  |  | $ 500,000,000 |
Senior Notes [Member] | 10.500% Valero Senior Notes Due in 2039 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Interest rate of notes (percent) |  |  |  |  |  | 10.50% |  | 10.50% |  |  |
Debt repurchased and retired, or redeemed amount |  |  |  |  |  | $ 137,000,000 |  |  |  |  |
Senior Notes [Member] | Floating Rate Senior Notes Due September 15, 2023 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Debt repurchased and retired, or redeemed amount |  |  |  | $ 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] | 2.850% Valero Senior Notes Due April 15, 2025, Issued September 2020 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Interest rate of notes (percent) |  |  |  |  | 2.85% |  | 2.85% |  |  |  |
Public Debt (Textual) |  |  |  |  |  |  |  |  |  |  |
Face amount of long-term debt issuance |  |  |  |  | $ 400,000,000 |  | $ 400,000,000 |  |  |  |
Senior Notes [Member] | 2.150% Valero Senior Notes Due September 15, 2027 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Interest rate of notes (percent) |  |  |  |  | 2.15% | 2.15% | 2.15% | 2.15% |  |  |
Public Debt (Textual) |  |  |  |  |  |  |  |  |  |  |
Face amount of long-term debt issuance |  |  |  |  | $ 600,000,000 |  | $ 600,000,000 |  |  |  |
Senior Notes [Member] | 2.850% Valero Senior Notes Due April 15, 2025, Issued April 2020 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Interest rate of notes (percent) |  |  |  |  |  |  |  |  |  |  | 2.85%
Public Debt (Textual) |  |  |  |  |  |  |  |  |  |  |
Face amount of long-term debt issuance |  |  |  |  |  |  |  |  |  |  | $ 650,000,000
Senior Notes [Member] | 4.000% Valero Senior Notes due April 1, 2029 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Interest rate of notes (percent) |  |  |  |  |  | 4.00% |  | 4.00% |  | 4.00% |
Public Debt (Textual) |  |  |  |  |  |  |  |  |  |  |
Face amount of long-term debt issuance |  |  |  |  |  |  |  |  |  | $ 1,000,000,000 |
Proceeds from issuance of senior long-term debt |  |  |  |  |  |  |  |  |  | $ 992,000,000 |
Senior Notes [Member] | 6.125% Valero Senior Notes Due February 1, 2020 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Interest rate of notes (percent) |  |  |  |  |  |  |  |  |  | 6.125% |
Debt repurchased and retired, or redeemed amount |  |  |  |  |  |  |  |  |  | $ 871,000,000 |
Public Debt (Textual) |  |  |  |  |  |  |  |  |  |  |
Premiums paid |  |  |  |  |  |  |  |  |  | $ 21,000,000 |
Senior Notes [Member] | 4.500% VLP Senior Notes Due March 15, 2028 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Interest rate of notes (percent) |  |  |  |  |  | 4.50% |  | 4.50% |  |  |
Senior Notes [Member] | 4.500% VLP Senior Notes Due March 15, 2028 [Member] | Valero Energy Partners LP [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Interest rate of notes (percent) |  |  |  |  |  |  |  |  |  | 4.50% |
Public Debt (Textual) |  |  |  |  |  |  |  |  |  |  |
Face amount of long-term debt issuance |  |  |  |  |  |  |  |  |  | $ 500,000,000 |
Senior Notes [Member] | 4.000% Valero Senior Notes Due June 1, 2052 [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Interest rate of notes (percent) |  | 4.00% |  |  |  |  |  |  |  |  |
Public Debt (Textual) |  |  |  |  |  |  |  |  |  |  |
Face amount of long-term debt issuance |  | $ 650,000,000 |  |  |  |  |  |  |  |  |
Proceeds from issuance of senior long-term debt |  | $ 639,000,000 |  |  |  |  |  |  |  |  |
Senior Notes [Member] | 2.850% Valero Senior Notes Due in 2025 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Interest rate of notes (percent) |  |  |  |  |  | 2.85% |  | 2.85% |  |  |
Senior Notes [Member] | 2.850% Valero Senior Notes Due in 2025 [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Debt repurchased and retired, or redeemed amount | 507,000,000 |  |  |  |  |  |  |  |  |  |
Senior Notes [Member] | 3.400% Valero Senior Notes Due in 2026 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Interest rate of notes (percent) |  |  |  |  |  | 3.40% |  | 3.40% |  |  |
Senior Notes [Member] | 3.400% Valero Senior Notes Due in 2026 [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Repurchased and Retired, or Redeemed |  |  |  |  |  |  |  |  |  |  |
Debt repurchased and retired, or redeemed amount | $ 653,000,000 |  |  |  |  |  |  |  |  |  |

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