Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
	Apr. 01, 2018	Apr. 01, 2018	Apr. 02, 2017	Apr. 26, 2018	Oct. 01, 2017
Equity, Class of Treasury Stock [Line Items]
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		55,900,000	19,000,000
Total cost of common stock repurchased		$ 3,171.4	$ 1,046.1
Shares available for repurchase	24,400,000	24,400,000
Cash dividend declared to shareholders	$ 0.30	$ 0.30
Dividends payable, payment date	May 25, 2018
Dividends payable, record date	May 10, 2018
Subsequent Event [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount				$ 100.0