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Fair Value (Tables) | 12 Months Ended
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Feb. 28, 2020
Fair Value Disclosures [Abstract] |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] | Assets and liabilities measured at fair value in our Consolidated Balance Sheets as of February 28, 2020 and February 22, 2019 are summarized below:
Fair Value of Financial Instruments | February 28, 2020
Level 1 | Level 2 | Level 3 | Total
Assets: |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 541.0 |  |  | $ | — |  |  | $ | — |  |  | $ | 541.0 |  |
Restricted cash | 6.1 |  |  | — |  |  | — |  |  | 6.1 |  |
Foreign exchange forward contracts | — |  |  | 1.2 |  |  | — |  |  | 1.2 |  |
Auction rate securities | — |  |  | — |  |  | 2.1 |  |  | 2.1 |  |
| $ | 547.1 |  |  | $ | 1.2 |  |  | $ | 2.1 |  |  | $ | 550.4 |  |
Liabilities: |  |  |  |  |  |  |  |
Foreign exchange forward contracts | $ | — |  |  | $ | (0.5 | ) |  | $ | — |  |  | $ | (0.5 | ) |
| $ | — |  |  | $ | (0.5 | ) |  | $ | — |  |  | $ | (0.5 | ) |
Fair Value of Financial Instruments | February 22, 2019
Level 1 | Level 2 | Level 3 | Total
Assets: |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 261.3 |  |  | $ | — |  |  | $ | — |  |  | $ | 261.3 |  |
Restricted cash | 3.5 |  |  | — |  |  | — |  |  | 3.5 |  |
Foreign exchange forward contracts | — |  |  | 3.9 |  |  | — |  |  | 3.9 |  |
Auction rate securities | — |  |  | — |  |  | 3.9 |  |  | 3.9 |  |
| $ | 264.8 |  |  | $ | 3.9 |  |  | $ | 3.9 |  |  | $ | 272.6 |  |
Liabilities: |  |  |  |  |  |  |  |
Foreign exchange forward contracts | $ | — |  |  | $ | (0.5 | ) |  | $ | — |  |  | $ | (0.5 | ) |
| $ | — |  |  | $ | (0.5 | ) |  | $ | — |  |  | $ | (0.5 | ) |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] | Below is a roll-forward of assets and liabilities measured at estimated fair value using Level 3 inputs for the years ended February 28, 2020 and February 22, 2019:
Roll-forward of Fair Value Using Level 3 Inputs | Auction Rate Securities
Balance as of February 23, 2018 | $ | 3.5 |  |
Unrealized gain on investments | 0.4 |  |
Balance as of February 22, 2019 | $ | 3.9 |  |
Unrealized loss on investments | (0.1 | ) |
Realized gain on investments | 0.5 |  |
Redemption of auction rate securities | (2.2 | ) |
Balance as of February 28, 2020 | $ | 2.1 |  |

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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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