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NET INCOME PER SHARE (Tables)
3 Months Ended
Mar. 31, 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 March 31,
 20222021
Numerator:
Net income attributable to Intuitive Surgical, Inc.$365.6 $426.3 
Denominator:
Weighted average shares outstanding used in basic calculation358.4 354.2 
Add: dilutive effect of potential common shares8.3 9.8 
Weighted average shares outstanding used in diluted calculation366.7 364.0 
Net income per share attributable to Intuitive Surgical, Inc.:
Basic$1.02 $1.20 
Diluted$1.00 $1.17