Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jul. 01, 2016	Oct. 02, 2015
Current assets:
Allowance for doubtful accounts	$ 0.5	$ 0.4
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized	25,000,000	25,000,000
Preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 0.25	$ 0.25
Common stock, shares authorized	525,000,000	525,000,000
Common stock, shares issued	222,000,000	219,000,000
Common stock, shares outstanding	187,500,000	190,300,000