Fair Value (Schedule Of Financial Instruments Measured At Fair Value On Recurring Basis) (Details) - USD ($) $ in Millions	Jul. 01, 2016	Oct. 02, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	$ 7.7
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	318.6	$ 464.6
Auction rate security	2.3	2.3
Foreign currency derivative assets	0.1	3.3
Total	321.0	470.2
Purchase obligation recorded for business combinations	76.4	75.4
Foreign currency derivative liabilities	0.0	2.8
Contingent consideration	8.2	0.5
Total	84.6	78.7
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	318.6	464.6
Auction rate security	0.0	0.0
Foreign currency derivative assets	0.0	0.0
Total	318.6	464.6
Purchase obligation recorded for business combinations	0.0	0.0
Foreign currency derivative liabilities	0.0	0.0
Contingent consideration	0.0	0.0
Total	0.0	0.0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	0.0	0.0
Auction rate security	0.0	0.0
Foreign currency derivative assets	0.0	0.0
Total	0.0	0.0
Purchase obligation recorded for business combinations	0.0	0.0
Foreign currency derivative liabilities	0.0	0.0
Contingent consideration	0.0	0.0
Total	0.0	0.0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	0.0	0.0
Auction rate security	2.3	2.3
Foreign currency derivative assets	0.1	3.3
Total	2.4	5.6
Purchase obligation recorded for business combinations	76.4	75.4
Foreign currency derivative liabilities	0.0	2.8
Contingent consideration	8.2	0.5
Total	$ 84.6	$ 78.7