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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 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Numerator:        
Net income attributable to Intuitive Surgical, Inc. $ 658.4 $ 526.9 $ 1,356.8 $ 1,071.8
Denominator:        
Weighted-average shares outstanding used in basic calculation (in shares) 358.5 355.0 358.0 354.2
Add: dilutive effect of potential common shares (in shares) 5.6 6.0 6.4 6.6
Weighted-average shares outstanding used in diluted calculation (in shares) 364.1 361.0 364.4 360.8
Net income per share attributable to Intuitive Surgical, Inc.:        
Basic (in dollars per share) $ 1.84 $ 1.48 $ 3.79 $ 3.03
Diluted (in dollars per share) $ 1.81 $ 1.46 $ 3.72 $ 2.97