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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Statement of Comprehensive Income [Abstract]        
Net income $ 259 $ 237 $ 790 $ 685
Other comprehensive income (loss):        
Foreign currency translation adjustment (24) 1 48 (4)
Net deferred gain on cash flow hedges, net of taxes 0 3 0 3
Other comprehensive (loss) income (24) 4 48 (1)
Comprehensive income 235 241 838 684
Less: Comprehensive income attributable to noncontrolling interests 14 11 43 36
Comprehensive income attributable to Quest Diagnostics $ 221 $ 230 $ 795 $ 648