XML 58 R47.htm IDEA: XBRL DOCUMENT v3.10.0.1
NET INCOME PER SHARE - Computation of Basic and Diluted Net Income Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Numerator:        
Net income attributable to Intuitive Surgical, Inc. $ 292.5 $ 298.6 $ 835.4 $ 702.4
Denominator:        
Weighted average shares outstanding used in basic calculation 114.0 111.8 113.4 111.6
Add: dilutive effect of potential common shares 5.2 5.0 5.2 4.3
Weighted average shares outstanding used in diluted calculation 119.2 116.8 118.6 115.9
Net income per share attributable to Intuitive Surgical, Inc.:        
Basic (in dollars per share) $ 2.57 $ 2.67 $ 7.37 $ 6.29
Diluted (in dollars per share) $ 2.45 $ 2.56 $ 7.04 $ 6.06