Fair Value (Schedule Of Financial Instruments Measured At Fair Value On Recurring Basis) (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Millions	Apr. 01, 2016	Oct. 02, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	$ 498.3	$ 464.6
Auction rate security	2.3	2.3
Foreign currency derivative assets	1.0	3.3
Total	501.6	470.2
Purchase obligation recorded for business combinations	76.1	75.4
Foreign currency derivative liabilities	0.6	2.8
Business Combination, Contingent Consideration, Liability	0.5	0.5
Total	77.2	78.7
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	498.3	464.6
Auction rate security	0.0	0.0
Foreign currency derivative assets	0.0	0.0
Total	498.3	464.6
Purchase obligation recorded for business combinations	0.0	0.0
Foreign currency derivative liabilities	0.0	0.0
Business Combination, Contingent Consideration, Liability	0.0	0.0
Total	0.0	0.0
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
Business Combination, Contingent Consideration, Liability	0.0	0.0
Total	0.0	0.0
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	1.0	3.3
Total	3.3	5.6
Purchase obligation recorded for business combinations	76.1	75.4
Foreign currency derivative liabilities	0.6	2.8
Business Combination, Contingent Consideration, Liability	0.5	0.5
Total	$ 77.2	$ 78.7