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NET INCOME PER SHARE (Tables)
6 Months Ended
Jun. 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 June 30,Six Months Ended June 30,
 2023202220232022
Numerator:
Net income attributable to Intuitive Surgical, Inc.$420.8 $307.8 $776.1 $673.4 
Denominator:
Weighted-average shares outstanding used in basic calculation350.9 358.1 350.6 358.2 
Add: dilutive effect of potential common shares6.4 5.8 6.0 7.1 
Weighted-average shares outstanding used in diluted calculation357.3 363.9 356.6 365.3 
Net income per share attributable to Intuitive Surgical, Inc.:
Basic$1.20 $0.86 $2.21 $1.88 
Diluted$1.18 $0.85 $2.18 $1.84