Capital Structure Capital Structure (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Feb. 24, 2017	Feb. 26, 2016	Feb. 27, 2015
Class of Stock [Line Items]
Common stock repurchases	$ 48.4	$ 56.4	$ 36.3
Conversion of Stock, Shares Converted	0.3	0.6
Class A Common Stock [Member]
Class of Stock [Line Items]
Common stock repurchases, shares	3.5	3.7
Common stock repurchases	$ 48.4	$ 56.4
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