Restructuring And Related Charges (Rollforward Of Restructuring Accrual) (Details) $ in Millions	6 Months Ended
	Mar. 29, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
Accrual balance at beginning	$ 33.6
Adoption of ASU 842 (Note 1)	(4.3)
Provisions	34.3
Cash expenditures	(38.7)
Non-cash items	(1.2)
Accrual balance at ending	23.7
Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Accrual balance at beginning	6.6
Adoption of ASU 842 (Note 1)
Provisions	3.3
Cash expenditures	(3.5)
Non-cash items
Accrual balance at ending	6.4
Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Accrual balance at beginning	27.0
Adoption of ASU 842 (Note 1)	(4.3)
Provisions	31.0
Cash expenditures	(35.2)
Non-cash items	(1.2)
Accrual balance at ending	$ 17.3