XML 94 R79.htm IDEA: XBRL DOCUMENT v3.8.0.1
Capital Structure Capital Structure (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Feb. 23, 2018
Feb. 24, 2017
Feb. 26, 2016
Class of Stock [Line Items]      
Common stock repurchases $ 33.8 $ 48.4 $ 56.4
Conversion of Stock, Shares Converted 0.9 0.3  
Class A Common Stock [Member]      
Class of Stock [Line Items]      
Common stock repurchases, shares 2.4 3.5  
Common stock repurchases $ 33.8 $ 48.4
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