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Earnings per Share (Tables) | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
Components of Basic and Diluted Earnings Per Share | The components of basic and diluted earnings per share are as follows:
| Three Months Ended March 31, |
In millions, except per share amounts | 2019 |  | 2018 |
Net loss attributable to common stockholders | $ | (10 | ) |  | $ | (7 | ) |
Weighted average outstanding shares of common stock | 117.1 |  |  | 121.4 |  |
Dilutive effect of employee stock options, restricted stock and other stock awards | — |  |  | — |  |
Common stock and common stock equivalents | 117.1 |  |  | 121.4 |  |
Net loss per share: |  |  |  |
Basic | $ | (0.09 | ) |  | $ | (0.06 | ) |
Diluted | $ | (0.09 | ) |  | $ | (0.06 | ) |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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