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Income Taxes Income Tax Contingencies (Details) - USD ($) $ in Millions | 12 Months Ended
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Feb. 23, 2018 | Feb. 24, 2017 | Feb. 26, 2016
Liability for Uncertain Tax Positions [Abstract] |  |  |
Liability for uncertain tax positions, noncurrent | $ 0.0 | $ 0.2 |
Unrecognized Tax Benefits [Roll Forward] |  |  |
Unrecognized tax benefits, beginning of period | 2.8 | 8.6 | $ 8.8
Gross decreases - tax positions in prior period | (1.0) | (5.3) | 0.0
Lapse of statute of limitations | 0.4 | (0.5) | (0.2)
Unrecognized tax benefits, end of period | $ 2.2 | $ 2.8 | $ 8.6

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- Definition Liability for Uncertain Tax Positions [Abstract] + References No definition available. + Details
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- Definition Amount recognized for uncertainty in income taxes classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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