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EARNINGS PER SHARE | 3 Months Ended
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Mar. 31, 2016
Earnings Per Share, Basic and Diluted [Abstract] |
EARNINGS (LOSS) PER SHARE | EARNINGS PER SHARE The computation of basic and diluted earnings per common share was as follows:
| Three Months Ended March 31,
| 2016 |  | 2015
Amounts attributable to Quest Diagnostics’ stockholders: |  |  |  |  |
Net income attributable to Quest Diagnostics | $ | 102 |  |  | $ | 61 |
Less: Earnings allocated to participating securities | — |  |  | — |
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted | $ | 102 |  |  | $ | 61 |
Weighted average common shares outstanding – basic | 143 |  |  | 144 |
Effect of dilutive securities: |  |  |  |  |
Stock options and performance share units | 1 |  |  | 2 |
Weighted average common shares outstanding – diluted | 144 |  |  | 146 |
Earnings per share attributable to Quest Diagnostics’ common stockholders: |  |  |  |  |
Basic | $ | 0.71 |  |  | $ | 0.42 |
Diluted | $ | 0.70 |  |  | $ | 0.42 |
The following securities were not included in the calculation of diluted earnings per share due to their antidilutive effect:
| Three Months Ended March 31,
| 2016 |  | 2015
Stock options and performance share units | 3 |  |  | 1 |

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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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