v3.25.4
EARNINGS PER SHARE - Summary of Earnings Per Share, Basic and Diluted (Details) - 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 Gilead $ 8,510 $ 480 $ 5,665
Shares used in basic earnings per share attributable to Gilead calculation (in shares) 1,244 1,247 1,248
Dilutive effect of equity-based awards (in shares) 11 8 10
Shares used in diluted earnings per share attributable to Gilead calculation (in shares) 1,255 1,255 1,258
Basic earnings per share attributable to Gilead (in dollars per share) $ 6.84 $ 0.38 $ 4.54
Diluted earnings per share attributable to Gilead (in dollars per share) $ 6.78 $ 0.38 $ 4.50