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Earnings Per Share | 6 Months Ended
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Jun. 30, 2016
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share The numerator of basic earnings per share (EPS) is net income attributable to Phillips 66, reduced by noncancelable dividends paid on unvested share-based employee awards during the vesting period (participating securities). The denominator of basic EPS is the sum of the daily weighted-average number of common shares outstanding during the periods presented and fully vested stock and unit awards that have not yet been issued as common stock. The numerator of diluted EPS is also based on net income attributable to Phillips 66, which is reduced only by dividend equivalents paid on participating securities for which the dividends are more dilutive than the participation of the awards in the earnings of the periods presented. To the extent unvested stock, unit or option awards and vested unexercised stock options are dilutive, they are included with the weighted-average common shares outstanding in the denominator. Treasury stock is excluded from the denominator in both basic and diluted EPS.
| Three Months Ended June 30 |  | Six Months Ended June 30
| 2016 |  | 2015 |  | 2016 |  | 2015
| Basic |  | Diluted |  |  | Basic |  | Diluted |  |  | Basic |  | Diluted |  |  | Basic |  | Diluted |
Amounts attributed to Phillips 66 Common Stockholders (millions): |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Phillips 66 | $ | 496 |  | 496 |  |  | 1,012 |  | 1,012 |  |  | 881 |  | 881 |  |  | 1,999 |  | 1,999 |
Income allocated to participating securities | (2 | ) | (1 | ) |  | (2 | ) | — |  |  | (3 | ) | (3 | ) |  | (3 | ) | — |
Net Income available to common stockholders | $ | 494 |  | 495 |  |  | 1,010 |  | 1,012 |  |  | 878 |  | 878 |  |  | 1,996 |  | 1,999 |
Weighted-average common shares outstanding (thousands): | 524,080 |  | 528,247 |  |  | 539,848 |  | 544,617 |  |  | 525,654 |  | 529,993 |  |  | 541,649 |  | 546,398 |
Effect of stock-based compensation | 4,167 |  | 2,813 |  |  | 4,769 |  | 4,309 |  |  | 4,339 |  | 2,822 |  |  | 4,749 |  | 4,587 |
Weighted-average common shares outstanding—EPS | 528,247 |  | 531,060 |  |  | 544,617 |  | 548,926 |  |  | 529,993 |  | 532,815 |  |  | 546,398 |  | 550,985 |
Earnings Per Share of Common Stock (dollars) | $ | 0.94 |  | 0.93 |  |  | 1.85 |  | 1.84 |  |  | 1.66 |  | 1.65 |  |  | 3.65 |  | 3.63 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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