CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Jul. 25, 2015	Jul. 26, 2014
Statement of Financial Position [Abstract]
Long-term debt premium	$ 2.8	$ 3.2
Preferred stock, par value (in dollars per share)	$ 1	$ 1.00
Preferred stock, authorized (in shares)	1,000,000	1,000,000
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.333	$ 0.333
Common stock, authorized (in shares)	150,000,000	150,000,000
Common stock, issued (in shares)	33,381,779	33,990,589
Common stock, outstanding (in shares)	33,381,779	33,990,589