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Net Income Per Share (Tables) | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Computation Of Basic And Diluted Net Income Per Share | The following table presents the computation of basic and diluted net income per share attributable to Intuitive Surgical, Inc. (in millions, except per share amounts):
| Years Ended December 31,
| 2021 |  | 2020 |  | 2019
Numerator: |  |  |  |  |
Net income attributable to Intuitive Surgical, Inc. | $ | 1,704.6 |  |  | $ | 1,060.6 |  |  | $ | 1,379.3 |
Denominator: |  |  |  |  |
Weighted-average shares outstanding used in basic calculation | 356.1 |  |  | 351.1 |  |  | 346.2 |
Add: dilutive effect of potential common shares | 9.7 |  |  | 9.9 |  |  | 12.2 |
Weighted-average shares outstanding used in diluted calculation | 365.8 |  |  | 361.0 |  |  | 358.4 |
Net income per share attributable to Intuitive Surgical, Inc.: |  |  |  |  |
Basic | $ | 4.79 |  |  | $ | 3.02 |  |  | $ | 3.98 |
Diluted | $ | 4.66 |  |  | $ | 2.94 |  |  | $ | 3.85 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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