Restructuring And Related Charges (Summary Of Costs Incurred And Cumulative Costs By Cost Type) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 29, 2019	Dec. 30, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	$ 27.4	$ 9.1
Cumulative costs	80.5
Future costs to be incurred	57.4
Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	5.3	1.6
Cumulative costs	12.7
Future costs to be incurred	0.6
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	22.1	$ 7.5
Cumulative costs	67.8
Future costs to be incurred	$ 56.8