v3.25.4
Earnings Per Share - Reconciles the Basic to Diluted Weighted Average Shares Outstanding (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Earnings Per Share [Abstract]      
Net income attributable to IQVIA Holdings Inc. $ 1,360 $ 1,373 $ 1,358
Denominator:      
Basic weighted average common shares outstanding (in shares) 171.9 181.3 183.8
Effect of dilutive stock options and share awards (in shares) 1.6 2.1 2.5
Diluted weighted average common shares outstanding (in shares) 173.5 183.4 186.3
Earnings per share attributable to common stockholders:      
Basic (in dollars per share) $ 7.91 $ 7.57 $ 7.39
Diluted (in dollars per share) $ 7.84 $ 7.49 $ 7.29