Restructuring And Related Charges (Rollforward Of Restructuring Accrual) (Details) $ in Millions	3 Months Ended
	Dec. 29, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Accrual balance at beginning	$ 33.6
Adoption of ASU 842 (Note 1)	(4.3)
Provisions	19.4
Cash expenditures	(32.2)
Non-cash items	0.1
Accrual balance at ending	16.6
Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Accrual balance at beginning	6.6
Adoption of ASU 842 (Note 1)
Provisions	1.2
Cash expenditures	(1.6)
Non-cash items
Accrual balance at ending	6.2
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Accrual balance at beginning	27.0
Adoption of ASU 842 (Note 1)	(4.3)
Provisions	18.2
Cash expenditures	(30.6)
Non-cash items	0.1
Accrual balance at ending	$ 10.4