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Earnings Per Share (Tables) | 6 Months Ended
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Aug. 24, 2018
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Earnings Per Share |
| Three Months Ended | Six Months Ended
Computation of Earnings per Share | August 24, 2018 | August 25, 2017 | August 24, 2018 | August 25, 2017
Net income | $ | 49.1 |  |  | $ | 36.9 |  |  | $ | 66.1 |  |  | $ | 55.0 |  |
Adjustment for earnings attributable to participating securities | (1.0 | ) |  | (0.7 | ) |  | (1.3 | ) |  | (1.0 | ) |
Net income used in calculating earnings per share | $ | 48.1 |  |  | $ | 36.2 |  |  | $ | 64.8 |  |  | $ | 54.0 |  |
Weighted-average common shares outstanding including participating securities (in millions) | 119.2 |  |  | 119.7 |  |  | 119.0 |  |  | 119.8 |  |
Adjustment for participating securities (in millions) | (2.5 | ) |  | (2.4 | ) |  | (2.3 | ) |  | (2.2 | ) |
Shares used in calculating basic earnings per share (in millions) | 116.7 |  |  | 117.3 |  |  | 116.7 |  |  | 117.6 |  |
Effect of dilutive stock-based compensation (in millions) | — |  |  | 0.2 |  |  | — |  |  | 0.2 |  |
Shares used in calculating diluted earnings per share (in millions) | 116.7 |  |  | 117.5 |  |  | 116.7 |  |  | 117.8 |  |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |
Basic | $ | 0.41 |  |  | $ | 0.31 |  |  | $ | 0.56 |  |  | $ | 0.46 |  |
Diluted | $ | 0.41 |  |  | $ | 0.31 |  |  | $ | 0.56 |  |  | $ | 0.46 |  |
Total common shares outstanding at period end (in millions) | 116.7 |  |  | 116.0 |  |  | 116.7 |  |  | 116.0 |  |
Anti-dilutive performance units excluded from the computation of diluted earnings per share (in millions) | 0.5 |  |  | 0.5 |  |  | 0.5 |  |  | 0.5 |  |

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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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