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Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Feb. 23, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | The following table summarizes the changes in accumulated balances of other comprehensive income (loss) during the years ended February 23, 2018 and February 24, 2017:
| Unrealized gain (loss) on investments | Pension and other post-retirement liability adjustments | Foreign currency translation adjustments | Total
Balance as of February 26, 2016 | $ | 0.6 |  |  | $ | 10.7 |  |  | $ | (50.9 | ) |  | $ | (39.6 | ) |
Other comprehensive income (loss) before reclassifications | (0.5 | ) |  | 6.8 |  |  | (12.4 | ) |  | (6.1 | ) |
Amounts reclassified from accumulated other comprehensive income (loss) | (0.4 | ) |  | (4.5 | ) |  | — |  |  | (4.9 | ) |
Net other comprehensive income (loss) during period | (0.9 | ) |  | 2.3 |  |  | (12.4 | ) |  | (11.0 | ) |
Balance as of February 24, 2017 | $ | (0.3 | ) |  | $ | 13.0 |  |  | $ | (63.3 | ) |  | $ | (50.6 | ) |
Other comprehensive income (loss) before reclassifications | — |  |  | 3.0 |  |  | 38.6 |  |  | 41.6 |  |
Amounts reclassified from accumulated other comprehensive income (loss) | — |  |  | (1.3 | ) |  | — |  |  | (1.3 | ) |
Net other comprehensive income (loss) during period | — |  |  | 1.7 |  |  | 38.6 |  |  | 40.3 |  |
Balance as of February 23, 2018 | $ | (0.3 | ) |  | $ | 14.7 |  |  | $ | (24.7 | ) |  | $ | (10.3 | ) |
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] | The following table provides details about reclassifications out of accumulated other comprehensive income (loss) for the years ended February 23, 2018 and February 24, 2017:
Detail of Accumulated Other Comprehensive Income (Loss) Components | Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Affected Line in the Consolidated Statements of Income
Year Ended
February 23, 2018 | February 24, 2017
Unrealized gains on investments | $ | — |  |  | $ | (0.5 | ) |  | Other income, net |
| — |  |  | 0.1 |  |  | Income tax expense |
| — |  |  | (0.4 | ) |  | Net income |
Amortization of pension and other post-retirement liability adjustments |  |  |  |  |  |
Actuarial losses (gains) | (1.7 | ) |  | (0.2 | ) |  | Cost of sales |
Actuarial losses (gains) | (1.5 | ) |  | 0.1 |  |  | Operating expenses |
Prior service cost (credit) | (3.2 | ) |  | (4.0 | ) |  | Cost of sales |
Prior service cost (credit) | (3.9 | ) |  | (4.8 | ) |  | Operating expenses |
Settlements - Actuarial losses (gains) | 3.9 |  |  | 0.9 |  |  | Cost of sales |
Settlements - Actuarial losses (gains) | 3.2 |  |  | — |  |  | Operating expenses |
| 1.9 |  |  | 3.5 |  |  | Income tax expense |
| (1.3 | ) |  | (4.5 | ) |  | Net income |
Total reclassifications | $ | (1.3 | ) |  | $ | (4.9 | ) |  |  |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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