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Equity (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
May 03, 2018
Mar. 31, 2018
Mar. 31, 2017
Reconciliation of the Beginning and Ending Balances of the Carrying Amounts of Equity      
Balance as of beginning of period   $ 22,900 $ 20,854
Net income   582 321
Dividends   (345) (315)
Stock-based compensation expense   14 13
Transactions in connection with stock-based compensation plans   (46) (10)
Stock purchases under purchase programs   (256) (292)
Distributions to noncontrolling interests   (11) (34)
Other   6 38
Other comprehensive income   51 76
Balance as of end of period   22,925 20,651
Dividend Declared [Member] | Subsequent Event [Member]      
Equity (Textual)      
Dividends payable, date declared May 03, 2018    
Dividends payable, amount per share (in usd per share) $ 0.80    
Dividends payable, date to be paid Jun. 05, 2018    
Dividends payable, date of record May 17, 2018    
Entities Other Than Valero Energy Partners LP [Member]      
Reconciliation of the Beginning and Ending Balances of the Carrying Amounts of Equity      
Contribution from noncontrolling interest   30 0
Valero Energy Corporation Stockholders [Member]      
Reconciliation of the Beginning and Ending Balances of the Carrying Amounts of Equity      
Balance as of beginning of period   21,991 20,024
Net income   469 305
Dividends   (345) (315)
Stock-based compensation expense   14 13
Transactions in connection with stock-based compensation plans   (46) (10)
Stock purchases under purchase programs   (256) (292)
Distributions to noncontrolling interests   0 0
Other   2 24
Other comprehensive income   48 76
Balance as of end of period   21,877 19,825
Valero Energy Corporation Stockholders [Member] | Entities Other Than Valero Energy Partners LP [Member]      
Reconciliation of the Beginning and Ending Balances of the Carrying Amounts of Equity      
Contribution from noncontrolling interest   0 0
Noncontrolling Interest [Member]      
Reconciliation of the Beginning and Ending Balances of the Carrying Amounts of Equity      
Balance as of beginning of period [1]   909 830
Net income [1]   113 16
Distributions to noncontrolling interests [1]   (11) (34)
Other [1]   4 14
Other comprehensive income [1]   3 0
Balance as of end of period [1]   1,048 826
Noncontrolling Interest [Member] | Entities Other Than Valero Energy Partners LP [Member]      
Reconciliation of the Beginning and Ending Balances of the Carrying Amounts of Equity      
Contribution from noncontrolling interest [1]   $ 30 $ 0
[1] The noncontrolling interests relate to third-party ownership interests in VIEs for which we are the primary beneficiary and therefore consolidate. See Note 6 for information about our consolidated VIEs.