Equity (Narrative) (Details) $ / shares in Units, $ in Millions		3 Months Ended
	Apr. 09, 2015 $ / shares	Dec. 27, 2015 USD ($) $ / shares shares	Dec. 28, 2014 USD ($) shares	Sep. 27, 2015 $ / shares shares
Class of Stock [Line Items]
Par value of common stock | $ / shares		$ 0.001		$ 0.001
Authorized shares of common stock		2,400,000,000		2,400,000,000
Authorized shares of preferred stock		7,500,000
Outstanding shares of preferred stock		0
Shares of common stock repurchased		4,500,000	5,600,000
Total cost of common stock repurchased | $		$ 267.1	$ 216.1
Shares available for repurchase		48,300,000
Cash dividend declared to shareholders | $ / shares		$ 0.20
Dividends payable, payment date		Feb. 19, 2016
Dividends payable, record date		Feb. 04, 2016
Common Stock [Member]
Class of Stock [Line Items]
Stock split conversion ratio	2
Par value of common stock | $ / shares	$ 0.001