v3.26.3
BUSINESS SEGMENT INFORMATION (Details)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
segment
Sep. 30, 2025
USD ($)
Segment Reporting [Line Items]        
Number of reportable segments | segment     1  
Percentage of net revenues 100.00% 100.00% 100.00% 100.00%
Total net revenues $ 3,097 $ 2,816 $ 9,035 $ 8,229
Segment operating income 479 386 1,337 1,170
Non-operating expense, net (63) (58) (175) (182)
Income before income taxes and equity in earnings of equity method investees 416 328 1,162 988
Income tax expense (99) (77) (261) (233)
Equity in earnings of equity method investees, net of taxes 9 8 23 35
Net income 326 259 924 790
Less: Net income attributable to noncontrolling interests 14 14 40 43
Net income attributable to Quest Diagnostics 312 245 884 747
Depreciation and amortization $ 147 $ 142 $ 440 $ 425
DIS business        
Segment Reporting [Line Items]        
Percentage of net revenues 98.00% 98.00% 98.00% 98.00%
Total net revenues $ 3,035 $ 2,755 $ 8,845 $ 8,043
Less: Other segment items 2,497 2,273 7,309 6,653
Segment operating income 538 482 1,536 1,390
Depreciation and amortization 106 99 317 296
All other operating segments        
Segment Reporting [Line Items]        
Total net revenues 62 61 190 186
Segment operating income 9 9 26 24
Depreciation and amortization 3 3 9 10
General corporate activities        
Segment Reporting [Line Items]        
Segment operating income (68) (105) (225) (244)
Depreciation and amortization $ 38 $ 40 $ 114 $ 119
Minimum | DIS business        
Segment Reporting [Line Items]        
Percentage of net revenues 95.00% 95.00% 95.00% 95.00%