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Fair Value Hierarchy of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Aug. 23, 2019 | May 24, 2019 | Feb. 22, 2019 | Aug. 24, 2018 | Feb. 23, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Document Period End Date | Aug. 23, 2019 |  |  |  |
Long-term Debt, Fair Value | $ 544.0 |  | $ 492.0 |  |
Cash and cash equivalents | 229.1 |  | 261.3 |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |
Restricted Cash | 4.8 |  | 3.5 | $ 3.5 | $ 2.5
Assets, Fair Value Disclosure |  | $ 237.6 | 272.6 |  |
Liabilities, Fair Value Disclosure [Abstract] |  |  |  |  |
Foreign exchange forward contracts, Liability, Fair Value Disclosure | (0.4) |  | (0.5) |  |
Liabilities, Fair Value Disclosure | (0.4) |  | (0.5) |  |
Foreign Exchange Contract [Member] |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |
Foreign Currency Contract, Asset, Fair Value Disclosure | 1.7 |  | 3.9 |  |
Auction Rate Securities [Member] |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 2.0 |  | 3.9 |  |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Cash and cash equivalents | 229.1 |  | 261.3 |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |
Restricted Cash | 4.8 |  | 3.5 |  |
Assets, Fair Value Disclosure | 233.9 |  | 264.8 |  |
Liabilities, Fair Value Disclosure [Abstract] |  |  |  |  |
Foreign exchange forward contracts, Liability, Fair Value Disclosure | 0.0 |  | 0.0 |  |
Liabilities, Fair Value Disclosure | 0.0 |  | 0.0 |  |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign Exchange Contract [Member] |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |
Foreign Currency Contract, Asset, Fair Value Disclosure | 0.0 |  | 0.0 |  |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Auction Rate Securities [Member] |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 0.0 |  | 0.0 |  |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Cash and cash equivalents | 0.0 |  | 0.0 |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |
Restricted Cash | 0.0 |  | 0.0 |  |
Assets, Fair Value Disclosure | 1.7 |  | 3.9 |  |
Liabilities, Fair Value Disclosure [Abstract] |  |  |  |  |
Foreign exchange forward contracts, Liability, Fair Value Disclosure | (0.4) |  | (0.5) |  |
Liabilities, Fair Value Disclosure | (0.4) |  | (0.5) |  |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign Exchange Contract [Member] |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |
Foreign Currency Contract, Asset, Fair Value Disclosure | 1.7 |  | 3.9 |  |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Auction Rate Securities [Member] |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 0.0 |  | 0.0 |  |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Cash and cash equivalents | 0.0 |  | 0.0 |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |
Restricted Cash | 0.0 |  | 0.0 |  |
Assets, Fair Value Disclosure | 2.0 |  | 3.9 |  |
Liabilities, Fair Value Disclosure [Abstract] |  |  |  |  |
Foreign exchange forward contracts, Liability, Fair Value Disclosure | 0.0 |  | 0.0 |  |
Liabilities, Fair Value Disclosure | 0.0 |  | 0.0 |  |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign Exchange Contract [Member] |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |
Foreign Currency Contract, Asset, Fair Value Disclosure | 0.0 |  | 0.0 |  |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Auction Rate Securities [Member] |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | $ 2.0 |  | $ 3.9 |  |

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- Definition The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD. + References No definition available. + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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