Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
	Mar. 27, 2016	Mar. 27, 2016	Mar. 29, 2015	Apr. 21, 2016	Sep. 27, 2015
Equity [Abstract]
Authorized shares of common stock	2,400,000,000	2,400,000,000			2,400,000,000
Par value of common stock	$ 0.001	$ 0.001			$ 0.001
Authorized shares of preferred stock	7,500,000	7,500,000
Outstanding shares of preferred stock	0	0
Shares of common stock repurchased		27,500,000	8,600,000
Total cost of common stock repurchased		$ 1,584.5	$ 342.4
Shares available for repurchase	25,200,000	25,200,000
Stock Repurchase Program, Additional Number of Shares Authorized to be Repurchased				100,000,000
Cash dividend declared to shareholders	$ 0.20	$ 0.20
Dividends payable, payment date	May 20, 2016
Dividends payable, record date	May 05, 2016