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Earnings Per Common Share | 9 Months Ended
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Sep. 30, 2019
Earnings Per Share [Abstract] |
Earnings Per Common Share | Earnings Per Common Share The following is a reconciliation of the numerators and denominators of the basic and diluted earnings per common share computations for the nine and three months ended September 30, 2019 and 2018 (in millions, except per share amounts):
| Nine Months Ended September 30, |  | Three Months Ended September 30,
2019 |  | 2018 |  | 2019 |  | 2018
Basic: |  |  |  |  |  |  |
Net income attributable to Intercontinental Exchange, Inc. | $ | 1,485 |  |  | $ | 1,377 |  |  | $ | 529 |  |  | $ | 458 |
Weighted average common shares outstanding | 563 |  |  | 577 |  |  | 559 |  |  | 572 |
Basic earnings per common share | $ | 2.64 |  |  | $ | 2.39 |  |  | $ | 0.95 |  |  | $ | 0.80 |
Diluted: |  |  |  |  |  |  |
Weighted average common shares outstanding | 563 |  |  | 577 |  |  | 559 |  |  | 572 |
Effect of dilutive securities - stock options and restricted shares | 3 |  |  | 4 |  |  | 4 |  |  | 4 |
Diluted weighted average common shares outstanding | 566 |  |  | 581 |  |  | 563 |  |  | 576 |
Diluted earnings per common share | $ | 2.62 |  |  | $ | 2.37 |  |  | $ | 0.94 |  |  | $ | 0.79 |
Basic earnings per common share is calculated using the weighted average common shares outstanding during the period. Common equivalent shares from stock options and restricted stock awards, using the treasury stock method, are included in the diluted per share calculations unless the effect of their inclusion would be antidilutive. During the nine months ended September 30, 2019 and 2018, 437,000 and 451,000 outstanding stock options, respectively, were not included in the computation of diluted earnings per common share, because to do so would have had an antidilutive effect. Certain figures in the table above may not recalculate due to rounding.

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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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