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Earnings per Share (Tables) | 12 Months Ended
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Dec. 31, 2019
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Summary of Basic and Diluted Earnings per Share From Operations | Basic earnings per share from operations for the years ended December 31, 2017, 2018 and 2019, is calculated as follows:
|  | 2017 |  |  | 2018 |  |  | 2019 |
Profit attributable to ordinary shares (In millions of Korean won) |  | ￦ | 461,559 |  |  | ￦ | 645,571 |  |  |  | 649,109 |
Weighted average number of ordinary shares outstanding (In number of shares) |  |  | 245,017,175 |  |  |  | 245,049,466 |  |  |  | 245,171,283 |
Basic earnings per share (In Korean won) |  |  | 1,884 |  |  |  | 2,634 |  |  |  | 2,648 |
Diluted earnings per share from operations is calculated by adjusting the weighted average number of ordinary shares outstanding to assume conversion of all dilutive potential ordinary shares. The Controlling Company has dilutive potential ordinary shares from convertible preferred stocks, stock options and other share-based payments. Diluted earnings per share from operations for the years ended December 31, 2017, 2018 and 2019 is calculated as follows:
|  | 2017 |  |  | 2018 |  |  | 2019 |
Profit attributable to ordinary shares (In millions of Korean won) |  | ￦ | 461,559 |  |  | ￦ | 645,571 |  |  |  | 649,109 |
Adjustment to net income attributable to ordinary shares (In millions of Korean won) |  |  | — |  |  |  | — |  |  |  | (157 | )
Diluted profit attributable to ordinary shares (In millions of Korean won) |  |  | 461,559 |  |  |  | 645,571 |  |  |  | 648,952 |
Number of dilutive potential ordinary shares outstanding (In number of shares) |  |  | 79,880 |  |  |  | 1,163 |  |  |  | 70,267 |
Weighted average number of ordinary shares outstanding (In number of shares) |  |  | 245,097,055 |  |  |  | 245,050,629 |  |  |  | 245,241,550 |
Diluted earnings per share (In Korean won) |  |  | 1,883 |  |  |  | 2,634 |  |  |  | 2,646 |

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- Definition The disclosure of earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2019-01-01 -Paragraph 66 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=33&code=ifrs-tx-2019-en-r&anchor=para_66&doctype=Standard -URIDate 2019-03-27 + Details
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