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Income Taxes Income Tax Contingencies (Details) - USD ($) $ in Millions | 12 Months Ended
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Feb. 26, 2021 | Feb. 28, 2020 | Feb. 22, 2019
Unrecognized Tax Benefits [Roll Forward] |  |  |
Unrecognized tax benefits, beginning of period | $ 2.0 | $ 2.0 | $ 2.2
Gross decreases - tax positions in prior period | 0.0 | 0.0 | 0.0
Lapse of statute of limitations | $ 0.3 | 0.0 | (0.2)
Unrecognized tax benefits, end of period |  | $ 2.0 | $ 2.0

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=116821951&loc=SL37586934-109318 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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