Income Taxes Income Tax Contingencies (Details) - USD ($) $ in Millions	12 Months Ended
Feb. 28, 2020	Feb. 22, 2019	Feb. 23, 2018
Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits, beginning of period	$ 2.0	$ 2.2	$ 2.8
Gross decreases - tax positions in prior period	0.0	0.0	(1.0)
Lapse of statute of limitations	$ 0.0	(0.2)	0.4
Unrecognized tax benefits, end of period		$ 2.0	$ 2.2

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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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

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-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)
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+ 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://fasb.org/us-gaap/role/ref/legacyRef
-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

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- Definition

Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 15A
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