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Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2022
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table shows the calculation of basic and diluted earnings per share attributable to Gilead:
Year Ended December 31,
(in millions, except per share amounts)202220212020
Net income attributable to Gilead$4,592 $6,225 $123 
Shares used in basic earnings per share attributable to Gilead calculation1,255 1,256 1,257 
Dilutive effect of stock options and equivalents
Shares used in diluted earnings per share attributable to Gilead calculation1,262 1,262 1,263 
Basic earnings per share attributable to Gilead$3.66 $4.96 $0.10 
Diluted earnings per share attributable to Gilead$3.64 $4.93 $0.10