Goodwill and Intangible Assets (Schedule Of Intangible Assets Subject To Amortization) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2016	Sep. 30, 2016
Finite-Lived Intangible Assets [Line Items]
Total intangible assets, Gross Carrying Amount	$ 230.3	$ 213.9
Total intangible assets, Accumulated Amortization	(155.4)	(146.9)
Total intangible assets, Net Carrying Amount	74.9	67.0
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite-Lived Trademarks	1.6	1.6
Nonamortizing intangible assets, Gross Carrying Amount	$ 1.6	1.6
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period Remaining (Years)	4 years 1 month 6 days
Gross Carrying Amount	$ 78.5	78.5
Accumulated Amortization	(59.8)	(57.7)
Net Carrying Amount	$ 18.7	20.8
Developed technology and other[Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period Remaining (Years)	5 years 8 months 112 days
Gross Carrying Amount	$ 150.2	133.8
Accumulated Amortization	(95.6)	(89.2)
Net Carrying Amount	$ 54.6	$ 44.6