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Earnings Per Share | 3 Months Ended
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Mar. 31, 2020
Earnings Per Share |
Earnings Per Share | 5. Earnings Per Share Basic and diluted earnings per share for the three months ended March 31 were computed using the following common share data (shares in millions):
​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019
Number of common shares outstanding at end of period |  | 422.0 |  | 424.7
Effect of using weighted average common shares outstanding |  | 2.2 |  | (0.2)
Weighted average basic common shares outstanding |  | 424.2 |  | 424.5
Dilutive effect of equity-based compensation awards and other contingently issuable shares |  | 2.2 |  | 2.4
Weighted average diluted common shares outstanding |  | 426.4 |  | 426.9
Potentially issuable shares |  | 6.6 |  | 7.6
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding |  | 2.1 |  | 3.0
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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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