v3.26.1
BUSINESS SEGMENT INFORMATION (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
segment
Jun. 30, 2025
USD ($)
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 $ 3,043 $ 2,761 $ 5,938 $ 5,413
Segment operating income 459 438 858 784
Non-operating expense, net (47) (54) (112) (124)
Income before income taxes and equity in earnings of equity method investees 412 384 746 660
Income tax expense (88) (97) (162) (156)
Equity in earnings of equity method investees, net of taxes 10 9 14 27
Net income 334 296 598 531
Less: Net income attributable to noncontrolling interests 14 14 26 29
Net income attributable to Quest Diagnostics 320 282 572 502
Depreciation and amortization $ 146 $ 143 $ 293 $ 283
DIS business        
Segment Reporting [Line Items]        
Percentage of net revenues 98.00% 98.00% 98.00% 98.00%
Total net revenues $ 2,978 $ 2,699 $ 5,810 $ 5,288
Less: Other segment items 2,437 2,205 4,812 4,380
Segment operating income 541 494 998 908
Depreciation and amortization 105 100 211 197
All other operating segments        
Segment Reporting [Line Items]        
Total net revenues 65 62 128 125
Segment operating income 10 7 17 15
Depreciation and amortization 3 3 6 7
General corporate activities        
Segment Reporting [Line Items]        
Segment operating income (92) (63) (157) (139)
Depreciation and amortization $ 38 $ 40 $ 76 $ 79
Minimum | DIS business        
Segment Reporting [Line Items]        
Percentage of net revenues 95.00% 95.00% 95.00% 95.00%