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EARNINGS PER COMMON SHARE COMPUTATION | 6 Months Ended
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Jun. 30, 2017
Earnings Per Share [Abstract] |
EARNINGS PER COMMON SHARE COMPUTATION | EARNINGS PER COMMON SHARE COMPUTATION Detail supporting the computation of basic and diluted earnings per common share was as follows for the three and six months ended June 30, 2017 and 2016:
| Three months ended June 30, |  | Six months ended June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
| (dollars in millions, except per common share results; number of shares in thousands)
Net income available for common stockholders | $ | 650 |  |  | $ | 311 |  |  | $ | 1,765 |  |  | $ | 565 |
Weighted average outstanding shares of common stock used to compute basic earnings per common share | 144,600 |  |  | 149,386 |  |  | 146,212 |  |  | 149,273 |
Dilutive effect of: |  |  |  |  |  |  |
Employee stock options | 158 |  |  | 218 |  |  | 179 |  |  | 218 |
Restricted stock | 876 |  |  | 1,202 |  |  | 862 |  |  | 1,360 |
Shares used to compute diluted earnings per common share | 145,634 |  |  | 150,806 |  |  | 147,253 |  |  | 150,851 |
Basic earnings per common share | $ | 4.49 |  |  | $ | 2.08 |  |  | $ | 12.07 |  |  | $ | 3.79 |
Diluted earnings per common share | $ | 4.46 |  |  | $ | 2.06 |  |  | $ | 11.98 |  |  | $ | 3.75 |
Number of antidilutive stock options and restricted stock excluded from computation | 449 |  |  | 676 |  |  | 693 |  |  | 980 |

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