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Capital Structure Capital Structure (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Feb. 26, 2021	Feb. 28, 2020	Feb. 22, 2019
Class of Stock [Line Items]
Common stock repurchases	$ 36.8	$ 8.7	$ 4.2
Conversion of Stock, Shares Converted	1.4	1.6
Class A Common Stock [Member]
Class of Stock [Line Items]
Common stock repurchases, shares	3.3	0.5
Common stock repurchases	$ 42.7	$ 8.7
Class B Common Stock [Member]
Class of Stock [Line Items]
Common stock repurchases, shares	0.0	0.0
Common stock repurchases	$ 0.0	$ 0.0

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The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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