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Earnings Per Share | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Earnings Per Share | 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,
|  | 2018 |  | 2017 |  | 2018 |  | 2017
Net income for basic and diluted EPS | $ | 213 |  |  | $ | 245 |  |  | $ | 152 |  |  | $ | 141 |
Basic weighted average shares outstanding | 78.8 |  |  | 82.6 |  |  | 80.1 |  |  | 84.1 |
Options and non-vested stock (a) | 0.7 |  |  | 1.4 |  |  | 0.9 |  |  | 1.4 |
Diluted weighted average shares outstanding | 79.5 |  |  | 84.0 |  |  | 81.0 |  |  | 85.5 |
Earnings per share: |  |  |  |  |  |  |
| Basic | $ | 2.71 |  |  | $ | 2.96 |  |  | $ | 1.90 |  |  | $ | 1.68 |
| Diluted | $ | 2.68 |  |  | $ | 2.91 |  |  | $ | 1.88 |  |  | $ | 1.65 |
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(a) | For the three months ended September 30, 2018 and 2017, 0.5 million and 0.7 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, 2018 and 2017, 0.2 million and 0.8 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 The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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