The following table sets forth the computation of basic earnings per common share and diluted earnings per common share for the years ended December 31: | | | | | | | | | | | | | | 2019 | | 2018 | | 2017 | | (In millions, except per share data) | Numerator: | | | | | | Income from continuing operations | $ | 1,582 |
| | $ | 1,568 |
| | $ | 1,241 |
| Preferred stock dividends | (79 | ) | | (64 | ) | | (64 | ) | Income from continuing operations available to common shareholders | 1,503 |
| | 1,504 |
| | 1,177 |
| Income from discontinued operations, net of tax | — |
| | 191 |
| | 22 |
| Net income available to common shareholders | $ | 1,503 |
| | $ | 1,695 |
| | $ | 1,199 |
| Denominator: | | | | | | Weighted-average common shares outstanding—basic | 995 |
| | 1,092 |
| | 1,186 |
| Potential common shares | 4 |
| | 10 |
| | 12 |
| Weighted-average common shares outstanding—diluted | 999 |
| | 1,102 |
| | 1,198 |
| Earnings per common share from continuing operations available to common shareholders(1): | | | | | | Basic | $ | 1.51 |
| | $ | 1.38 |
| | $ | 0.99 |
| Diluted | 1.50 |
| | 1.36 |
| | 0.98 |
| Earnings per common share from discontinued operations(1): | | | | | | Basic | $ | 0.00 |
| | $ | 0.18 |
| | $ | 0.02 |
| Diluted | 0.00 |
| | 0.17 |
| | 0.02 |
| Earnings per common share(1): | | | | | | Basic | $ | 1.51 |
| | $ | 1.55 |
| | $ | 1.01 |
| Diluted | 1.50 |
| | 1.54 |
| | 1.00 |
|
________ | | (1) | Certain per share amounts may not appear to reconcile due to rounding. |
The effect from the assumed exercise of 7 million, 6 million and 14 million in stock options, restricted stock units and awards and performance stock units for the years ended December 31, 2019, 2018 and 2017, respectively, was not included in the above computations of diluted earnings per common share because such amounts would have had an antidilutive effect on earnings per common share.
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