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Income Taxes Income Tax Contingencies (Details) - USD ($) $ in Millions	12 Months Ended
	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

X

- 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.

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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
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- Definition

Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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