Capital Structure Capital Structure (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Feb. 28, 2020	Feb. 22, 2019	Feb. 23, 2018
Class of Stock [Line Items]
Common stock repurchases	$ 8.7	$ 4.2	$ 16.0
Conversion of Stock, Shares Converted	1.6	1.3
Class A Common Stock [Member]
Class of Stock [Line Items]
Common stock repurchases, shares	0.5	0.3
Common stock repurchases	$ 8.7	$ 4.2
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