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Earnings per Share (Tables) | 6 Months Ended
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Jun. 30, 2018
Earnings Per Share [Abstract] |
Computation of Earnings per Share | Earnings per share (in millions, except share data):
|  | Three Months Ended |  | Six Months Ended
|  | June 30, 2018 |  | July 1, 2017 |  | June 30, 2018 |  | July 1, 2017
Basic: |  |  |  |  |  |  |  |
Net income |  | $ | 70 |  |  | $ | 17 |  |  | $ | 179 |  |  | $ | 25 |
Weighted-average shares outstanding |  | 53,537,876 |  |  | 51,996,353 |  |  | 53,414,267 |  |  | 51,928,911 |
Basic earnings per share |  | $ | 1.31 |  |  | $ | 0.33 |  |  | $ | 3.35 |  |  | $ | 0.49 |
Diluted: |  |  |  |  |  |  |  |
Net income |  | $ | 70 |  |  | $ | 17 |  |  | $ | 179 |  |  | $ | 25 |
Weighted-average shares outstanding |  | 53,537,876 |  |  | 51,996,353 |  |  | 53,414,267 |  |  | 51,928,911 |
Dilutive shares |  | 717,831 |  |  | 1,132,304 |  |  | 719,843 |  |  | 1,109,045 |
Diluted weighted-average shares outstanding |  | 54,255,707 |  |  | 53,128,657 |  |  | 54,134,110 |  |  | 53,037,956 |
Diluted earnings per share |  | $ | 1.29 |  |  | $ | 0.32 |  |  | $ | 3.30 |  |  | $ | 0.48 |

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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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