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EARNINGS PER SHARE | 12 Months Ended
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Dec. 31, 2015
Earnings Per Share, Basic and Diluted [Abstract] |
EARNINGS PER SHARE | EARNINGS PER SHARE The computation of basic and diluted earnings per common share is as follows (in millions, except per share data):
| 2015 |  | 2014 |  | 2013
Amounts attributable to Quest Diagnostics’ stockholders: |  |  |  |  |  |  |
Income from continuing operations | $ | 709 |  |  | $ | 551 |  |  | $ | 814 |
Income from discontinued operations, net of taxes | — |  |  | 5 |  |  | 35 |
Net income attributable to Quest Diagnostics’ common stockholders | $ | 709 |  |  | $ | 556 |  |  | $ | 849 |
Income from continuing operations | $ | 709 |  |  | $ | 551 |  |  | $ | 814 |
Less: Earnings allocated to participating securities | 3 |  |  | 2 |  |  | 3 |
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted | $ | 706 |  |  | $ | 549 |  |  | $ | 811 |
Weighted average common shares outstanding – basic | 144 |  |  | 145 |  |  | 152 |
Effect of dilutive securities: |  |  |  |  |  |  |
Stock options and performance share units | 1 |  |  | — |  |  | 1 |
Weighted average common shares outstanding – diluted | 145 |  |  | 145 |  |  | 153 |
Earnings per share attributable to Quest Diagnostics’ common stockholders – basic: |  |  |  |  |  |  |
Income from continuing operations | $ | 4.92 |  |  | $ | 3.80 |  |  | $ | 5.35 |
Income from discontinued operations | — |  |  | 0.03 |  |  | 0.23 |
Net income | $ | 4.92 |  |  | $ | 3.83 |  |  | $ | 5.58 |
Earnings per share attributable to Quest Diagnostics’ common stockholders – diluted: |  |  |  |  |  |  |
Income from continuing operations | $ | 4.87 |  |  | $ | 3.78 |  |  | $ | 5.31 |
Income from discontinued operations | — |  |  | 0.03 |  |  | 0.23 |
Net income | $ | 4.87 |  |  | $ | 3.81 |  |  | $ | 5.54 |
The following securities were not included in the calculation of diluted earnings per share due to their antidilutive effect:
| 2015 |  | 2014 |  | 2013
Stock options and performance share units | 2 |  |  | 2 |  |  | 1 |

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