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NET INCOME PER SHARE (Tables)
9 Months Ended
Sep. 30, 2023
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Net Income Per Share
The following table presents the computation of basic and diluted net income per share attributable to Intuitive Surgical, Inc. (in millions, except per share amounts):
 Three Months Ended September 30,Nine Months Ended September 30,
 2023202220232022
Numerator:
Net income attributable to Intuitive Surgical, Inc.$415.7 $324.0 $1,191.8 $997.4 
Denominator:
Weighted-average shares outstanding used in basic calculation351.7 355.3 351.0 357.2 
Add: dilutive effect of potential common shares6.5 5.2 6.1 6.5 
Weighted-average shares outstanding used in diluted calculation358.2 360.5 357.1 363.7 
Net income per share attributable to Intuitive Surgical, Inc.:
Basic$1.18 $0.91 $3.40 $2.79 
Diluted$1.16 $0.90 $3.34 $2.74