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Earnings Per Common Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Earnings per common share from continuing operations: |  |  |  |
Net income attributable to Valero stockholders from continuing operations | $ 831 | $ 745 | $ 399 | $ 849
Less dividends paid: |  |  |  |
Common stock |  |  | 166 | 57
Weighted-average common shares outstanding | 550 | 567 | 550 | 567
Earnings per common share from continuing operations: |  |  |  |
Distributed earnings | $ 0.15 | $ 0.05 | $ 0.30 | $ 0.10
Total earnings per common share from continuing operations | $ 1.50 | $ 1.31 | $ 0.72 | $ 1.49
Earnings per common share from continuing operations - assuming dilution |  |  |  |
Net income attributable to Valero stockholders from continuing operations | 831 | 745 | 399 | 849
Weighted-average common shares outstanding | 550 | 567 | 550 | 567
Common equivalent shares: |  |  |  |
Weighted-average common shares outstanding - assuming dilution | 555 | 574 | 556 | 573
Earnings per common share from continuing operations - assuming dilution | $ 1.50 | $ 1.30 | $ 0.72 | $ 1.48
Common Stock [Member] |  |  |  |
Earnings per common share from continuing operations: |  |  |  |
Net income attributable to Valero stockholders from continuing operations | 831 | 745 | 399 | 849
Less dividends paid: |  |  |  |
Common stock | 82 | 29 | 165 | 57
Nonvested restricted stock | 1 | 0 | 1 | 0
Undistributed earnings | 748 | 716 | 233 | 792
Weighted-average common shares outstanding | 550 | 567 | 550 | 567
Earnings per common share from continuing operations: |  |  |  |
Distributed earnings | $ 0.15 | $ 0.05 | $ 0.30 | $ 0.10
Undistributed earnings | $ 1.35 | $ 1.26 | $ 0.42 | $ 1.39
Total earnings per common share from continuing operations | $ 1.50 | $ 1.31 | $ 0.72 | $ 1.49
Earnings per common share from continuing operations - assuming dilution |  |  |  |
Net income attributable to Valero stockholders from continuing operations | $ 831 | $ 745 | $ 399 | $ 849
Weighted-average common shares outstanding | 550 | 567 | 550 | 567
Common equivalent shares: |  |  |  |
Stock options | 3 | 5 | 4 | 5
Performance awards and unvested restricted stock | 2 | 2 | 2 | 1
Weighted-average common shares outstanding - assuming dilution | 555 | 574 | 556 | 573
Earnings per common share from continuing operations - assuming dilution | $ 1.50 | $ 1.30 | $ 0.72 | $ 1.48
Restricted Stock [Member] |  |  |  |
Less dividends paid: |  |  |  |
Weighted-average common shares outstanding | 3 | 3 | 3 | 3
Earnings per common share from continuing operations: |  |  |  |
Distributed earnings | $ 0.15 | $ 0.05 | $ 0.30 | $ 0.10
Undistributed earnings | $ 1.35 | $ 1.26 | $ 0.42 | $ 1.39
Total earnings per common share from continuing operations | $ 1.50 | $ 1.31 | $ 0.72 | $ 1.49
Earnings per common share from continuing operations - assuming dilution |  |  |  |
Weighted-average common shares outstanding | 3 | 3 | 3 | 3

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- Definition The earnings attributable to each security on the basis that all of the earnings for the period had been distributed (to the extent that each security may share in earnings). This is the earnings amount which reflects the participation rights in undistributed earnings of each security. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-6 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 61 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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