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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Statement of Comprehensive Income [Abstract]      
Net income $ 1,015 $ 2,080 $ 1,499
Other comprehensive income (loss):      
Foreign currency translation adjustment (8) 13 15
Net change in available-for-sale debt securities, net of taxes 0 (7) 0
Net deferred gain on cash flow hedges, net of taxes 1 1 3
Other comprehensive (loss) income (7) 7 18
Comprehensive income 1,008 2,087 1,517
Less: Comprehensive income attributable to noncontrolling interests 69 85 68
Comprehensive income attributable to Quest Diagnostics $ 939 $ 2,002 $ 1,449