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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2017
Earnings Per Share [Abstract] |
Computation Of Basic And Diluted Earnings Per Share | The following table sets forth the computation of basic and diluted earnings per share (“EPS”) (shares in millions):
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2017 |  | 2016 |  | 2017 |  | 2016
Net income for basic and diluted EPS | $ | 245 |  |  | $ | 209 |  |  | $ | 141 |  |  | $ | 194 |
Basic weighted average shares outstanding | 82.6 |  |  | 90.4 |  |  | 84.1 |  |  | 93.5 |
Options and non-vested stock (a) | 1.4 |  |  | 1.4 |  |  | 1.4 |  |  | 1.3 |
Diluted weighted average shares outstanding | 84.0 |  |  | 91.8 |  |  | 85.5 |  |  | 94.8 |
Earnings per share: |  |  |  |  |  |  |
| Basic | $ | 2.96 |  |  | $ | 2.32 |  |  | $ | 1.68 |  |  | $ | 2.07 |
| Diluted | $ | 2.91 |  |  | $ | 2.28 |  |  | $ | 1.65 |  |  | $ | 2.05 |
__________
(a) | For the three months ended September 30, 2017 and 2016, 0.7 million and 0.2 million non-vested stock awards, respectively, have an anti-dilutive effect and therefore are excluded from the computation of diluted weighted average shares outstanding. For the nine months ended September 30, 2017 and 2016, 0.8 million and 0.2 million non-vested stock awards, respectively, have an anti-dilutive effect and therefore are excluded from the computation of diluted weighted average shares outstanding.

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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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