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Selected Quarterly Data (Tables)
 12 Months Ended
Dec. 31, 2018
Selected Quarterly Financial Information [Abstract]  
Schedule Of Selected Quarterly Data
 
Three Months Ended
 
December 31,
2018
 
September 30,
2018
 
June 30,
2018
 
March 31,
2018
Revenue
$
1,046.5

 
$
920.9

 
$
909.3

 
$
847.5

Gross profit
$
735.7

 
$
642.3

 
$
632.3

 
$
593.8

Net income attributable to Intuitive Surgical, Inc. (1)(2)(3)
$
292.5

 
$
292.5

 
$
255.3

 
$
287.6

Net income attributable to Intuitive Surgical, Inc. per share:
 
 
 
 
 
 
 
Basic
$
2.56

 
$
2.57

 
$
2.25

 
$
2.55

Diluted
$
2.45

 
$
2.45

 
$
2.15

 
$
2.44

 
 
 
 
 
 
 
 
(1) Includes discrete tax benefits as follows:
 
 
 
 
 
 
 
Excess tax benefits related to share-based compensation arrangements
$
15.8

 
$
24.1

 
$
21.6

 
$
54.7

Certain one-time tax benefits
$
2.5

 
$
4.6

 
$
—

 
$
—

(2) Includes pre-tax litigation benefits (charges)
$
—

 
$
1.8

 
$
(42.5
)
 
$
(4.5
)
(3) Includes charitable foundation contribution expense
$
(25.2
)
 
$
—

 
$
—

 
$
—

 
 
 
 
 
 
 
 
 
Three Months Ended
 
December 31,
2017
 
September 30,
2017
 
June 30,
2017
 
March 31,
2017
Revenue
$
892.0

 
$
807.8

 
$
758.8

 
$
679.6

Gross profit
$
634.0

 
$
568.1

 
$
530.1

 
$
469.8

Net income (loss) attributable to Intuitive Surgical, Inc. (1)(2)
$
(31.5
)
 
$
298.6

 
$
223.0

 
$
180.8

Net income (loss) attributable to Intuitive Surgical, Inc. per share:
 
 
 
 
 
 
 
Basic
$
(0.28
)
 
$
2.67

 
$
2.01

 
$
1.62

Diluted
$
(0.28
)
 
$
2.56

 
$
1.94

 
$
1.57

 
 
 
 
 
 
 
 
(1) Includes discrete tax benefits (expense) as follows:


 


 


 


Income expense related to the 2017 Tax Act
$
(317.8
)
 
$
—

 
$
—

 
$
—

Excess tax benefits related to share-based compensation arrangements
$
19.9

 
$
19.7

 
$
30.6

 
$
32.6

Certain one-time tax benefits
$
—

 
$
68.4

 
$
—

 
$
—

(2) Includes pre-tax litigation benefits (charges)
$
1.2

 
$
(9.7
)
 
$
4.5

 
$
(21.3
)