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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2016
Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] |
Antidilutive Securities Excluded From Computation Of Earnings Per Share | For the Current Quarter and the Prior Quarter, shares of the following securities and associated adjustments to net income, representing dividends on preferred stock and allocated earnings on participating securities, were excluded from the calculation of diluted EPS as the effect was antidilutive.
|  | Net Income Adjustments |  | Shares
|  | ($ in millions) |  | (in millions)
Three Months Ended March 31, 2016 |  |  |  |
Common stock equivalent of our preferred stock outstanding: |  |  |  |
5.75% cumulative convertible preferred stock |  | $ | 21 |  |  | 58 |
5.75% cumulative convertible preferred stock (series A) |  | $ | 16 |  |  | 42 |
5.00% cumulative convertible preferred stock (series 2005B) |  | $ | 3 |  |  | 6 |
4.50% cumulative convertible preferred stock |  | $ | 3 |  |  | 6 |
Participating securities |  | $ | — |  |  | 1 |
Three Months Ended March 31, 2015 |  |  |  |
Common stock equivalent of our preferred stock outstanding: |  |  |  |
5.75% cumulative convertible preferred stock |  | $ | 21 |  |  | 59 |
5.75% cumulative convertible preferred stock (series A) |  | $ | 16 |  |  | 42 |
5.00% cumulative convertible preferred stock (series 2005B) |  | $ | 3 |  |  | 6 |
4.50% cumulative convertible preferred stock |  | $ | 3 |  |  | 6 |
Participating securities |  | $ | — |  |  | 2 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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