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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Statement [Abstract] |  |  |
Net revenues | $ 7,531 | $ 7,402 | $ 7,214
Operating costs and expenses and other operating income: |  |  |
Cost of services | 4,926 | 4,719 | 4,616
Selling, general and administrative | 1,424 | 1,443 | 1,380
Amortization of intangible assets | 90 | 74 | 72
Loss (gain) on disposition of business | 4 | 0 | (118)
Other operating (income) expense, net | (14) | 1 | (13)
Total operating costs and expenses, net | 6,430 | 6,237 | 5,937
Operating income | 1,101 | 1,165 | 1,277
Other (expense) income: |  |  |
Interest expense, net | (167) | (151) | (143)
Other (expense) income, net | (8) | 16 | (48)
Total non-operating expenses, net | (175) | (135) | (191)
Income before income taxes and equity in earnings of equity method investees | 926 | 1,030 | 1,086
Income tax expense | (182) | (241) | (429)
Equity in earnings of equity method investees, net of taxes | 44 | 35 | 39
Net income | 788 | 824 | 696
Less: Net income attributable to noncontrolling interests | 52 | 52 | 51
Net income attributable to Quest Diagnostics | $ 736 | $ 772 | $ 645
Earnings per share attributable to Quest Diagnostics’ common stockholders: |  |  |
Basic (in dollars per share) | $ 5.39 | $ 5.63 | $ 4.58
Diluted (in dollars per share) | $ 5.29 | $ 5.50 | $ 4.51

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