CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Apr. 23, 2016	Jul. 25, 2015
Statement of Financial Position [Abstract]
Long-term debt premium	$ 0.0	$ 2.8
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)	31,341,444	33,381,779
Common stock, outstanding (in shares)	31,341,444	33,381,779