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EARNINGS PER SHARE | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
EARNINGS PER SHARE | EARNINGS PER SHARE The earnings per share amounts are the same for class A and class B common shares as the holders of each class are legally entitled to equal per share distributions whether through dividends or in liquidation. The following table sets forth the computation of basic and diluted earnings per share for the three months ended March 31, 2019 and 2018 (in millions, except per share amounts):
| Three Months Ended March 31,
2019 |  | 2018
Numerator: |  |  |
Net income attributable to common shareowners | $ | 1,111 |  |  | $ | 1,345 |
Denominator: |  |  |
Weighted average shares | 860 |  |  | 861 |
Deferred compensation obligations | 1 |  |  | 1 |
Vested portion of restricted units | 5 |  |  | 4 |
Denominator for basic earnings per share | 866 |  |  | 866 |
Effect of dilutive securities: |  |  |
Restricted units | 3 |  |  | 4 |
Stock options | — |  |  | — |
Denominator for diluted earnings per share | 869 |  |  | 870 |
Basic earnings per share | $ | 1.28 |  |  | $ | 1.55 |
Diluted earnings per share | $ | 1.28 |  |  | $ | 1.55 |
There were 0.9 million and 0.3 million antidilutive shares for the three months ended March 31, 2019 and 2018, respectively. Diluted earnings per share for the three months ended March 31, 2019 and 2018 excluded the effect of 0.1 million and 0.3 million shares of common stock, respectively, that may be issued upon the exercise of employee stock options, because such effect would be antidilutive.

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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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