Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Millions	Apr. 30, 2016	May 02, 2015
Series C Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, issued (in shares)	150,000	150,000
Preferred stock, authorized (in shares)	1,000,000	1,000,000
Treasury stock (in shares)	150,000	150,000
Series D Preferred Stock [Member]
Preferred stock, issued (in shares)		120,000
Preferred stock, aggregate liquidation preference		$ 6
Common Treasury Stock [Member]
Treasury stock (in shares)	4,032,784	4,032,784
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	75,000,000	75,000,000
Common stock, issued (in shares)	50,588,734	50,418,019