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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 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Numerator:        
Net income attributable to Intuitive Surgical, Inc. $ 704.4 $ 565.1 $ 2,061.2 $ 1,636.9
Denominator:        
Weighted-average shares outstanding used in basic calculation (in shares) 356.6 355.8 357.5 354.8
Add: dilutive effect of potential common shares (in shares) 5.2 6.9 6.0 6.6
Weighted-average shares outstanding used in diluted calculation (in shares) 361.8 362.7 363.5 361.4
Net income per share attributable to Intuitive Surgical, Inc.:        
Basic (in dollars per share) $ 1.98 $ 1.59 $ 5.77 $ 4.61
Diluted (in dollars per share) $ 1.95 $ 1.56 $ 5.67 $ 4.53