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BUSINESS SEGMENT INFORMATION (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of net revenues from the DIS business |  |  |  |  |  |  |  |  | 90.00% | 90.00% | 90.00%
Total net revenues | $ 1,849 | $ 1,880 | $ 1,925 | $ 1,839 | $ 1,883 | $ 1,904 | $ 1,902 | $ 1,746 | $ 7,493 | $ 7,435 | $ 7,146
Total operating income |  |  |  |  |  |  |  |  | 1,399 | 983 | 1,475
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 |  |  |  |  | 44 |  |  |  | (373) | (262) | (500)
Equity in earnings of equity method investees, net of taxes |  |  |  |  |  |  |  |  | 23 | 26 | 24
Income from continuing operations | 200 | 354 | 129 | 70 | 195 | 139 | 142 | 111 | 753 | 587 | 848
Income from discontinued operations, net of taxes |  |  |  |  |  |  |  |  | 0 | 5 | 35
Net income | 200 | 354 | 129 | 70 | 200 | 139 | 142 | 111 | 753 | 592 | 883
Less: net income attributable to noncontrolling interests | 12 | 12 | 11 | 9 | 10 | 10 | 9 | 7 | 44 | 36 | 34
Net income attributable to Quest Diagnostics | $ 188 | $ 342 | $ 118 | $ 61 | $ 190 | $ 129 | $ 133 | $ 104 | 709 | 556 | 849
Depreciation and amortization |  |  |  |  |  |  |  |  | 304 | 314 | 283
Total capital expenditures |  |  |  |  |  |  |  |  | 263 | 308 | 231
DIS business [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total net revenues |  |  |  |  |  |  |  |  | 6,965 | 6,873 | 6,587
Total operating income |  |  |  |  |  |  |  |  | 1,118 | 1,068 | 1,201
Depreciation and amortization |  |  |  |  |  |  |  |  | 212 | 206 | 189
Total capital expenditures |  |  |  |  |  |  |  |  | 243 | 283 | 196
All other operating segments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total net revenues |  |  |  |  |  |  |  |  | 528 | 562 | 559
Total operating income |  |  |  |  |  |  |  |  | 110 | 94 | 76
Depreciation and amortization |  |  |  |  |  |  |  |  | 10 | 13 | 12
Total capital expenditures |  |  |  |  |  |  |  |  | 16 | 17 | 26
General corporate income (expenses), Net [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total operating income |  |  |  |  |  |  |  |  | 171 | (179) | 198
Depreciation and amortization |  |  |  |  |  |  |  |  | 82 | 95 | 82
Total capital expenditures |  |  |  |  |  |  |  |  | $ 4 | $ 8 | $ 9

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