| EARNINGS PER COMMON SHARE The following table sets forth the computation of basic and diluted earnings per common share: TABLE 20.1 | | | | | | | | | | | | | Year Ended December 31 | 2019 | | 2018 | | 2017 | (dollars in millions, except per share data) | | | | | | Net income | $ | 387 |
| | $ | 373 |
| | $ | 199 |
| Less: Preferred stock dividends | 8 |
| | 8 |
| | 8 |
| Net income available to common stockholders | $ | 379 |
| | $ | 365 |
| | $ | 191 |
| Basic weighted average common shares outstanding | 324,938,720 |
| | 324,207,198 |
| | 302,195,295 |
| Net effect of dilutive stock options, warrants and restricted stock | 1,122,418 |
| | 1,416,405 |
| | 1,662,681 |
| Diluted weighted average common shares outstanding | 326,061,138 |
| | 325,623,603 |
| | 303,857,976 |
| Earnings per common share: | | | | | | Basic | $ | 1.17 |
| | $ | 1.13 |
| | $ | 0.63 |
| Diluted | $ | 1.16 |
| | $ | 1.12 |
| | $ | 0.63 |
|
The following table shows the average shares excluded from the above calculation as their effect would have been anti-dilutive: TABLE 20.2 | | | | | | | | | | Year Ended December 31 | 2019 | | 2018 | | 2017 | Average shares excluded from the diluted earnings per common share calculation | — |
| | 81 |
| | 910 |
|
|