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BUSINESS SEGMENT INFORMATION (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Segment Reporting Information [Line Items] |  |  |  |
Percentage of net revenues | 100.00% | 100.00% | 100.00% | 100.00%
Total net revenues | $ 1,827 | $ 1,953 | $ 3,649 | $ 3,844
Total operating income | 283 | 307 | 458 | 555
Non-operating expenses, net | (28) | (42) | (85) | (77)
Income from continuing operations before income taxes and equity in earnings of equity method investees | 255 | 265 | 373 | 478
Income tax expense | (66) | (63) | (92) | (113)
Equity in earnings of equity method investees, net of taxes | 4 | 17 | 18 | 30
Income (loss) from continuing operations | 193 | 219 | 299 | 395
Income from discontinued operations, net of taxes | 0 | 20 | 0 | 20
Net income | 193 | 239 | 299 | 415
Less: Net income attributable to noncontrolling interests | 8 | 13 | 15 | 25
Net income attributable to Quest Diagnostics | $ 185 | $ 226 | $ 284 | $ 390
DIS business |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Percentage of net revenues | 97.00% | 96.00% | 96.00% | 96.00%
Total net revenues | $ 1,764 | $ 1,872 | $ 3,508 | $ 3,684
Total operating income | $ 280 | $ 338 | $ 485 | $ 618
DIS business | Minimum |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Percentage of net revenues | 95.00% | 95.00% | 95.00% | 95.00%
All other operating segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | $ 63 | $ 81 | $ 141 | $ 160
Total operating income | 4 | 12 | 13 | 21
General corporate activities |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total operating income | $ (1) | $ (43) | $ (40) | $ (84)

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