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Consolidated Statements of Equity (unaudited) - USD ($) $ in Millions | Total | Entities Other Than Valero Energy Partners LP [Member] | Valero Energy Partners LP [Member] | Valero Energy Corporation Stockholders' Equity [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Treasury Stock [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Loss [Member] | Non-controlling Interests [Member] | Non-controlling Interests [Member] Entities Other Than Valero Energy Partners LP [Member] | Non-controlling Interests [Member] Valero Energy Partners LP [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance as of beginning of period at Dec. 31, 2016 | $ 20,854 |  |  | $ 20,024 | $ 7 | $ 7,088 | $ (12,027) | $ 26,366 | $ (1,410) | $ 830 |  |
Increase (Decrease) in Stockholders' Equity Roll Forward |  |  |  |  |  |  |  |  |  |  |  |
Reclassification of stranded income tax effects of Tax Reform per ASU 2018-02 (see Note 1) |  |  |  |  |  |  |  |  | 0 |  |  |
Net income | 1,756 |  |  | 1,694 |  |  |  | 1,694 |  | 62 |  |
Dividends on common stock | (936) |  |  | (936) |  |  |  | (936) |  |  |  |
Stock-based compensation expense | 37 |  |  | 37 |  | 37 |  |  |  |  |  |
Transactions in connection with stock-based compensation plans | (21) |  |  | (21) |  | (34) | 13 |  |  |  |  |
Stock purchases under purchase programs | (925) |  |  | (925) |  |  | (925) |  |  |  |  |
Issuance of Valero Energy Partners LP common units and contributions from noncontrolling interests |  |  | $ 33 |  |  |  |  |  |  |  |  | $ 33
Distributions to noncontrolling interests | (56) |  |  |  |  |  |  |  |  | (56) |  |
Other | (36) |  |  | (20) |  | (31) | 0 | 11 | 0 | (16) |  |
Other comprehensive income (loss) | 518 |  |  | 517 |  |  |  |  | 517 | 1 |  |
Balance as of end of period at Sep. 30, 2017 | 21,224 |  |  | 20,370 | 7 | 7,060 | (12,939) | 27,135 | (893) | 854 |  |
Balance as of beginning of period at Jun. 30, 2017 | 20,765 |  |  | 19,923 | 7 | 7,096 | (12,660) | 26,603 | (1,123) | 842 |  |
Increase (Decrease) in Stockholders' Equity Roll Forward |  |  |  |  |  |  |  |  |  |  |  |
Net income | 863 |  |  | 841 |  |  |  | 841 |  | 22 |  |
Dividends on common stock | (309) |  |  | (309) |  |  |  | (309) |  |  |  |
Stock-based compensation expense | 12 |  |  | 12 |  | 12 |  |  |  |  |  |
Transactions in connection with stock-based compensation plans | (10) |  |  | (10) |  | (7) | (3) |  |  |  |  |
Stock purchases under purchase programs | (276) |  |  | (276) |  |  | (276) |  |  |  |  |
Distributions to noncontrolling interests | (11) |  |  |  |  |  |  |  |  | (11) |  |
Other | (41) |  |  | (41) |  | (41) | 0 | 0 | 0 | 0 |  |
Other comprehensive income (loss) | 231 |  |  | 230 |  |  |  |  | 230 | 1 |  |
Balance as of end of period at Sep. 30, 2017 | 21,224 |  |  | 20,370 | 7 | 7,060 | (12,939) | 27,135 | (893) | 854 |  |
Balance as of beginning of period at Dec. 31, 2017 | 22,900 |  |  | 21,991 | 7 | 7,039 | (13,315) | 29,200 | (940) | 909 |  |
Increase (Decrease) in Stockholders' Equity Roll Forward |  |  |  |  |  |  |  |  |  |  |  |
Reclassification of stranded income tax effects of Tax Reform per ASU 2018-02 (see Note 1) | 0 |  |  | 0 |  |  |  | 91 | (91) |  |  |
Net income | 2,331 |  |  | 2,170 |  |  |  | 2,170 |  | 161 |  |
Dividends on common stock | (1,031) |  |  | (1,031) |  |  |  | (1,031) |  |  |  |
Stock-based compensation expense | 40 |  |  | 40 |  | 40 |  |  |  |  |  |
Transactions in connection with stock-based compensation plans | (149) |  |  | (149) |  | (34) | (115) |  |  |  |  |
Stock purchases under purchase programs | (904) |  |  | (904) |  |  | (904) |  |  |  |  |
Issuance of Valero Energy Partners LP common units and contributions from noncontrolling interests |  | $ 32 |  |  |  |  |  |  |  |  | $ 32 |
Distributions to noncontrolling interests | (63) |  |  |  |  |  |  |  |  | (63) |  |
Other | 7 |  |  | (3) |  | (3) | 0 | 0 | 0 | 10 |  |
Other comprehensive income (loss) | (203) |  |  | (204) |  |  |  |  | (204) | 1 |  |
Balance as of end of period at Sep. 30, 2018 | 22,960 |  |  | 21,910 | 7 | 7,042 | (14,334) | 30,430 | (1,235) | 1,050 |  |
Balance as of beginning of period at Jun. 30, 2018 | 22,804 |  |  | 21,769 | 7 | 7,032 | (13,923) | 29,915 | (1,262) | 1,035 |  |
Increase (Decrease) in Stockholders' Equity Roll Forward |  |  |  |  |  |  |  |  |  |  |  |
Net income | 874 |  |  | 856 |  |  |  | 856 |  | 18 |  |
Dividends on common stock | (341) |  |  | (341) |  |  |  | (341) |  |  |  |
Stock-based compensation expense | 11 |  |  | 11 |  | 11 |  |  |  |  |  |
Transactions in connection with stock-based compensation plans | (15) |  |  | (15) |  | 0 | (15) |  |  |  |  |
Stock purchases under purchase programs | (396) |  |  | (396) |  |  | (396) |  |  |  |  |
Distributions to noncontrolling interests | (13) |  |  |  |  |  |  |  |  | (13) |  |
Other | 6 |  |  | (1) |  | (1) | 0 | 0 | 0 | 7 |  |
Other comprehensive income (loss) | 30 |  |  | 27 |  |  |  |  | 27 | 3 |  |
Balance as of end of period at Sep. 30, 2018 | $ 22,960 |  |  | $ 21,910 | $ 7 | $ 7,042 | $ (14,334) | $ 30,430 | $ (1,235) | $ 1,050 |  |

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