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Earnings Per Share (Tables) | 12 Months Ended
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Feb. 23, 2018
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
Computation of Earnings per Share | Year Ended
February 23, 2018 | February 24, 2017 | February 26, 2016
Net income | $ | 80.7 |  |  | $ | 124.6 |  |  | $ | 170.3 |  |
Adjustment for earnings attributable to participating securities | (1.5 | ) |  | (2.4 | ) |  | (3.4 | ) |
Net income used in calculating earnings per share | $ | 79.2 |  |  | $ | 122.2 |  |  | $ | 166.9 |  |
Weighted-average common shares outstanding including participating securities (in millions) | 119.2 |  |  | 120.7 |  |  | 124.3 |  |
Adjustment for participating securities (in millions) | (2.3 | ) |  | (2.3 | ) |  | (2.5 | ) |
Shares used in calculating basic earnings per share (in millions) | 116.9 |  |  | 118.4 |  |  | 121.8 |  |
Effect of dilutive stock-based compensation (in millions) | 0.2 |  |  | 0.5 |  |  | 1.0 |  |
Shares used in calculating diluted earnings per share (in millions) | 117.1 |  |  | 118.9 |  |  | 122.8 |  |
Earnings per share: |  |  |  |  |  |
Basic | $ | 0.68 |  |  | $ | 1.03 |  |  | $ | 1.37 |  |
Diluted | $ | 0.68 |  |  | $ | 1.03 |  |  | $ | 1.36 |  |
Total common shares outstanding at period end (in millions) | 116.2 |  |  | 117.3 |  |  | 119.4 |  |
Anti-dilutive performance units excluded from the computation of diluted earnings per share (in millions) | 0.5 |  |  | 0.3 |  |  | — |  |

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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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