Earnings Per Share (Narrative) (Details) shares in Millions		3 Months Ended
	Apr. 09, 2015 $ / shares	Dec. 27, 2015 $ / shares shares	Dec. 28, 2014 shares	Sep. 27, 2015 $ / shares
Class of Stock [Line Items]
Common stock, par value		$ 0.001		$ 0.001
Common Stock [Member]
Class of Stock [Line Items]
Stock split conversion ratio	2
Common stock, par value	$ 0.001
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out-of-the-money stock options | shares		2.4	7.8