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Earnings Per Share Earnings Per Share (Notes) | 6 Months Ended
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Jun. 30, 2016
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share The following table sets forth the computation of basic and diluted earnings (loss) per share (“EPS”) (shares in millions):
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2016 |  | 2015 |  | 2016 |  | 2015
Net income (loss) for basic and diluted EPS | $ | 36 |  |  | $ | 143 |  |  | $ | (15 | ) |  | $ | 134 |
Basic weighted average shares outstanding | 93.9 |  |  | 105.5 |  |  | 95.1 |  |  | 105.8 |
Options and non-vested stock (a) | 1.2 |  |  | 1.2 |  |  | — |  |  | 1.3 |
Diluted weighted average shares outstanding | 95.1 |  |  | 106.7 |  |  | 95.1 |  |  | 107.1 |
Earnings (loss) per share: |  |  |  |  |  |  |
| Basic | $ | 0.39 |  |  | $ | 1.36 |  |  | $ | (0.16 | ) |  | $ | 1.27 |
| Diluted | $ | 0.38 |  |  | $ | 1.34 |  |  | $ | (0.16 | ) |  | $ | 1.25 |
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(a) | For the three months ended June 30, 2016 and 2015, 0.2 million non-vested stock awards have an anti-dilutive effect in each period and therefore are excluded from the computation of diluted weighted average shares outstanding. As the Company incurred a net loss for the six months ended June 30, 2016, 0.8 million outstanding options and 1.5 million non-vested stock awards have an anti-dilutive effect and therefore are excluded from the computation of diluted weighted average shares outstanding. For the six months ended June 30, 2015, 0.1 million non-vested stock awards 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 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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