Description Of Business and Basis Of Presentation (New Accounting Pronouncements) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 27, 2019	Sep. 27, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease, Right-of-Use Asset	$ 159.1	$ 0.0
Operating Lease, Liability	$ 160.2
Document Period End Date	Dec. 27, 2019
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease, Right-of-Use Asset	$ 141.4
Operating Lease, Liability	$ 143.1