Fair Value (Schedule Of Financial Instruments Measured At Fair Value On Recurring Basis) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Oct. 02, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability recorded for business combinations	$ 7.4
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market	408.7	$ 464.6
Auction rate security	2.3	2.3
Derivative Asset	0.0	3.3
Total	411.0	470.2
Purchase obligation recorded for business combinations	0.0	75.4
Derivative Liability	0.0	2.8
Contingent consideration liability recorded for business combinations	7.9	0.5
Total	7.9	78.7
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market	408.7	464.6
Auction rate security	0.0	0.0
Derivative Asset	0.0	0.0
Total	408.7	464.6
Purchase obligation recorded for business combinations	0.0	0.0
Derivative Liability	0.0	0.0
Contingent consideration liability recorded for business combinations	0.0	0.0
Total	0.0	0.0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market	0.0	0.0
Auction rate security	0.0	0.0
Derivative Asset	0.0	0.0
Total	0.0	0.0
Purchase obligation recorded for business combinations	0.0	0.0
Derivative Liability	0.0	0.0
Contingent consideration liability recorded for business combinations	0.0	0.0
Total	0.0	0.0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market	0.0	0.0
Auction rate security	2.3	2.3
Derivative Asset	0.0	3.3
Total	2.3	5.6
Purchase obligation recorded for business combinations	0.0	75.4
Derivative Liability	0.0	2.8
Contingent consideration liability recorded for business combinations	7.9	0.5
Total	$ 7.9	$ 78.7