Earnings Per Share (Schedule Of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Apr. 02, 2021	Jan. 01, 2021	Mar. 27, 2020	Dec. 27, 2019	Apr. 02, 2021	Mar. 27, 2020
Earnings Per Share [Abstract]
Net income	$ 325.0	$ 509.3	$ 181.1	$ 257.1	$ 834.3	$ 438.1
Weighted average shares outstanding - basic (shares)	165.0		170.0		165.2	170.1
Dilutive effect of equity based awards (shares)	1.8		1.1		1.7	1.2
Weighted average shares outstanding - diluted (shares)	166.8		171.1		166.9	171.3
Net income per share - basic (usd per share)	$ 1.97		$ 1.07		$ 5.05	$ 2.58
Net income per share - diluted (usd per share)	$ 1.95		$ 1.06		$ 5.00	$ 2.56
Anti-dilutive common stock equivalents (shares)	0.0		0.5		0.0	1.5