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EARNINGS PER COMMON SHARE COMPUTATION (Tables) | 6 Months Ended
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Jun. 30, 2017
Earnings Per Share [Abstract] |
Schedule of Details Supporting Computation of Earnings Per Share | 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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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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