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NET INCOME PER SHARE ATTRIBUTABLE TO GILEAD COMMON STOCKHOLDERS (Tables)
6 Months Ended
Jun. 30, 2022
Earnings Per Share [Abstract]  
Schedule of the Calculation of Basic and Diluted Earnings Per Share
The following table shows the calculation of basic and diluted net income per share attributable to Gilead common stockholders:
 Three Months EndedSix Months Ended
June 30,June 30,
(in millions, except per share amounts)2022202120222021
Net income attributable to Gilead$1,144 $1,522 $1,163 $3,251 
Shares used in per share calculation - basic1,256 1,255 1,255 1,256 
Dilutive effect of stock options and equivalents
Shares used in per share calculation - diluted1,260 1,260 1,261 1,261 
Net income per share attributable to Gilead common stockholders - basic$0.91 $1.21 $0.93 $2.59 
Net income per share attributable to Gilead common stockholders - diluted$0.91 $1.21 $0.92 $2.58