Earnings Per Share (Schedule Of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Mar. 29, 2019	Dec. 28, 2018	Mar. 30, 2018	Dec. 29, 2017	Mar. 29, 2019	Mar. 30, 2018
Earnings Per Share [Abstract]
Net income	$ 214.0	$ 284.9	$ 276.0	$ 70.4	$ 498.8	$ 346.4
Weighted average shares outstanding - basic (shares)	173.8		182.5		175.2	182.8
Dilutive effect of equity based awards (shares)	0.8		1.8		0.9	2.1
Weighted average shares outstanding - diluted (shares)	174.6		184.3		176.1	184.9
Net income per share - basic (usd per share)	$ 1.23		$ 1.51		$ 2.85	$ 1.89
Net income per share - diluted (usd per share)	$ 1.23		$ 1.50		$ 2.83	$ 1.87
Anti-dilutive common stock equivalents (shares)	1.9		0.1		1.8	0.2