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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Income Statement [Abstract] |  |  |
Net revenues | $ 7,493 | $ 7,435 | $ 7,146
Operating costs, expenses and other income: |  |  |
Cost of services | 4,657 | 4,637 | 4,326
Selling, general and administrative | 1,679 | 1,728 | 1,704
Amortization of intangible assets | 81 | 94 | 79
Gain on contribution of business to joint venture | (334) | 0 | 0
Gain on sale of royalty rights | 0 | 0 | (474)
Other operating expense (income), net | 11 | (7) | 36
Total operating costs, expenses and other income, net | 6,094 | 6,452 | 5,671
Operating income | 1,399 | 983 | 1,475
Other income (expense): |  |  |
Interest expense, net | (153) | (164) | (159)
Other (expense) income, net | (143) | 4 | 8
Total non-operating expenses, net | (296) | (160) | (151)
Income from continuing operations before income taxes and equity in earnings of equity method investees | 1,103 | 823 | 1,324
Income tax expense | (373) | (262) | (500)
Equity in earnings of equity method investees, net of taxes | 23 | 26 | 24
Income from continuing operations | 753 | 587 | 848
Income from discontinued operations, net of taxes | 0 | 5 | 35
Net income | 753 | 592 | 883
Less: Net income attributable to noncontrolling interests | 44 | 36 | 34
Net income attributable to Quest Diagnostics | 709 | 556 | 849
Amounts attributable to Quest Diagnostics' stockholders: |  |  |
Income from continuing operations | 709 | 551 | 814
Income from discontinued operations, net of taxes | 0 | 5 | 35
Net income attributable to Quest Diagnostics | $ 709 | $ 556 | $ 849
Earnings per share attributable to Quest Diagnostics' common stockholders - basic: |  |  |
Income from continuing operations | $ 4.92 | $ 3.80 | $ 5.35
Income from discontinued operations | 0.00 | 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 | 0.00 | 0.03 | 0.23
Net income | 4.87 | 3.81 | 5.54
Dividends per common share | $ 1.52 | $ 1.32 | $ 1.20

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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 + Details
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