v3.26.1
BUSINESS SEGMENT INFORMATION (Details)
$ in Millions
3 Months Ended
Mar. 31, 2026
USD ($)
segment
Mar. 31, 2025
USD ($)
Segment Reporting Information [Line Items]    
Number of reportable segments | segment 1  
Percentage of net revenues 100.00% 100.00%
Total net revenues $ 2,895 $ 2,652
Segment operating income 399 346
Non-operating expense, net (65) (70)
Income before income taxes and equity in earnings of equity method investees 334 276
Income tax expense (74) (59)
Equity in earnings of equity method investees, net of taxes 4 18
Net income 264 235
Less: Net income attributable to noncontrolling interests 12 15
Net income attributable to Quest Diagnostics 252 220
Depreciation and amortization $ 147 $ 140
DIS business    
Segment Reporting Information [Line Items]    
Percentage of net revenues 98.00% 98.00%
Total net revenues $ 2,832 $ 2,589
Less: Other segment items 2,375 2,175
Segment operating income 457 414
Depreciation and amortization 106 97
All other operating segments    
Segment Reporting Information [Line Items]    
Total net revenues 63 63
Segment operating income 7 8
Depreciation and amortization 3 4
General corporate activities    
Segment Reporting Information [Line Items]    
Segment operating income (65) (76)
Depreciation and amortization $ 38 $ 39
Minimum | DIS business    
Segment Reporting Information [Line Items]    
Percentage of net revenues 95.00% 95.00%