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Earnings Per Share | 6 Months Ended
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Jun. 30, 2019
Earnings Per Share | Note 7—Earnings Per Share ​ Basic earnings per share (“EPS”) is computed by dividing net income attributable to Amphenol Corporation by the weighted average number of common shares outstanding. Diluted EPS is computed by dividing net income attributable to Amphenol Corporation by the weighted average number of common shares and dilutive common shares outstanding, which relates to stock options. A reconciliation of the basic weighted average common shares outstanding to diluted weighted average common shares outstanding for the three and six months ended June 30, 2019 and 2018 is as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30, | ​ | Six Months Ended June 30,
(dollars and shares in millions, except per share data) |  | 2019 |  | 2018 |  | 2019 |  | 2018
Net income attributable to Amphenol Corporation shareholders | ​ | $ | 288.4 | ​ | $ | 284.8 | ​ | $ | 556.0 | ​ | $ | 550.4
Basic weighted average common shares outstanding | ​ |  | 298.0 | ​ |  | 300.8 | ​ |  | 298.1 | ​ |  | 302.3
Effect of dilutive stock options | ​ |  | 10.7 | ​ |  | 11.5 | ​ |  | 10.6 | ​ |  | 11.9
Diluted weighted average common shares outstanding | ​ |  | 308.7 | ​ |  | 312.3 | ​ |  | 308.7 | ​ |  | 314.2
Earnings per share attributable to Amphenol Corporation shareholders: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic | ​ | $ | 0.97 | ​ | $ | 0.95 | ​ | $ | 1.87 | ​ | $ | 1.82
Diluted | ​ | $ | 0.93 | ​ | $ | 0.91 | ​ | $ | 1.80 | ​ | $ | 1.75
​ Excluded from the computations above were anti-dilutive common shares of 7.7 million and 1.5 million for the three months ended June 30, 2019 and 2018, respectively. Excluded from the computations above were anti-dilutive common shares of 7.1 million and 0.9 million for the six months ended June 30, 2019 and 2018, respectively.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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