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Consolidated Statements Of Stockholders' Equity - USD ($)
shares in Millions, $ in Millions
Total
Common Stock
Additional Paid-In Capital
Retained Earnings
Accumulated Other Comprehensive Loss
Total Intuitive Surgical, Inc. Stockholders’ Equity
Noncontrolling Interest in Joint Venture
Beginning balances (shares) at Dec. 31, 2015   37.4          
Beginning balance at Dec. 31, 2015 $ 4,319.5 $ 0.0 $ 3,429.8 $ 899.2 $ (9.5) $ 4,319.5 $ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Adoption of new accounting standard [1] 40.3     40.3   40.3  
Issuance of common stock upon exercise of options and under stock purchase plan (shares)   1.5          
Issuance of common stock through employee stock plans 580.9   580.9     580.9  
Income tax benefit from employee stock plans 29.8   29.8     29.8  
Shares withheld related to net share settlement of equity awards (24.0)   (2.2) (21.8)   (24.0)  
Share-based compensation expense related to employee stock plans 177.6   177.6     177.6  
Repurchase and retirement of common stock (shares)   (0.1)          
Repurchase and retirement of common stock (42.5)   (4.1) (38.4)   (42.5)  
Net income attributable to Intuitive Surgical, Inc. 738.3     738.3   738.3  
Other comprehensive loss 0.6       0.6 0.6  
Ending balances (shares) at Dec. 31, 2016   38.8          
Beginning balance at Dec. 31, 2016 5,820.5 $ 0.0 4,211.8 1,617.6 (8.9) 5,820.5 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Three-for-one stock split (shares)   77.6          
Three-for-one stock split 0.0 $ 0.1 (0.1)        
Issuance of common stock upon exercise of options and under stock purchase plan (shares)   3.4          
Issuance of common stock through employee stock plans 415.5   415.5     415.5  
Shares withheld related to net share settlement of equity awards (shares)   (0.2)          
Shares withheld related to net share settlement of equity awards (56.6)   (5.1) (51.5)   (56.6)  
Share-based compensation expense related to employee stock plans 209.1   209.1     209.1  
Repurchase and retirement of common stock (shares)   (7.3)          
Repurchase and retirement of common stock (2,274.0)   (152.0) (2,122.0)   (2,274.0)  
Net income attributable to Intuitive Surgical, Inc. 670.9     670.9   670.9  
Other comprehensive loss (6.6)       (6.6) (6.6)  
Capital contribution from noncontrolling interest 2.0           2.0
Loss in noncontrolling interest $ (0.4)           (0.4)
Ending balances (shares) at Dec. 31, 2017 112.3 112.3          
Beginning balance at Dec. 31, 2017 $ 4,780.4 $ 0.1 4,679.2 115.0 (15.5) 4,778.8 1.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Adoption of new accounting standard [1] 390.8     392.1 (1.3) 390.8  
Issuance of common stock upon exercise of options and under stock purchase plan (shares)   2.5          
Issuance of common stock through employee stock plans 236.6   236.6     236.6  
Shares withheld related to net share settlement of equity awards (shares)   (0.3)          
Shares withheld related to net share settlement of equity awards (120.0)   (6.7) (113.3)   (120.0)  
Share-based compensation expense related to employee stock plans 261.2   261.2     261.2  
Net income attributable to Intuitive Surgical, Inc. 1,127.9     1,127.9   1,127.9  
Other Comprehensive Income (Loss), Including Cumulative Effect of New Accounting Principle in Period of Adoption, Net of Tax [1] 3.5       3.5 3.5  
Other comprehensive loss 2.2            
Capital contribution from noncontrolling interest 10.0           10.0
Loss in noncontrolling interest $ (2.9)           (2.9)
Ending balances (shares) at Dec. 31, 2018 114.5 114.5          
Beginning balance at Dec. 31, 2018 $ 6,687.5 $ 0.1 $ 5,170.3 $ 1,521.7 $ (13.3) $ 6,678.8 $ 8.7
[1] Represents the adjustments related to the adoption of new accounting standards. See Note 2 for details.