Shareholder's Equity (Summary Of Activity Of Common Stock Repurchase Program) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions			3 Months Ended			6 Months Ended
	Feb. 24, 2020	Nov. 18, 2019	Mar. 29, 2020	Mar. 31, 2019	Dec. 31, 2018	Mar. 29, 2020	Mar. 31, 2019
Equity, Class of Treasury Stock [Line Items]
Number of Shares Repuchased			3.0	4.6		6.2	4.9
Average Price Per Share			$ 55.06	$ 54.22		$ 58.57	$ 54.34
Amount			$ 167.7	$ 250.0	$ 18.5	$ 364.5	$ 268.5
Open Market Purchases [Member]
Equity, Class of Treasury Stock [Line Items]
Number of Shares Repuchased			2.7	4.6		4.0	4.6
Average Price Per Share			$ 54.54	$ 54.22		$ 56.97	$ 54.22
Amount			$ 149.2	$ 250.0		$ 230.6	$ 250.0
Private Purchases [Member]
Equity, Class of Treasury Stock [Line Items]
Number of Shares Repuchased						0.2	0.3
Average Price Per Share						$ 62.30	$ 56.02
Amount						$ 9.2	$ 18.5
ASR [Member]
Equity, Class of Treasury Stock [Line Items]
Number of Shares Repuchased	0.3	1.7	0.3			2.0
Average Price Per Share			$ 59.69			$ 61.47
Amount	$ 18.5	$ 106.3	$ 18.5			$ 124.7