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NET INCOME PER SHARE (Tables)
6 Months Ended
Jun. 30, 2022
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,
 2022202120222021
Numerator:
Net income attributable to Intuitive Surgical, Inc.$307.8 $517.2 $673.4 $943.5 
Denominator:
Weighted average shares outstanding used in basic calculation358.1 355.7 358.2 355.0 
Add: dilutive effect of potential common shares5.8 9.2 7.1 9.5 
Weighted average shares outstanding used in diluted calculation363.9 364.9 365.3 364.5 
Net income per share attributable to Intuitive Surgical, Inc.:
Basic$0.86 $1.45 $1.88 $2.66 
Diluted$0.85 $1.42 $1.84 $2.59