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Fair Value Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Jan. 02, 2015	Oct. 03, 2014
Changes to the fair value of the Level 3 assets [Roll Forward]
Auction rate security, ending balance	$ 2.3us-gaap_AvailableForSaleSecurities
Foreign currency derivative, ending balance	2.8us-gaap_DerivativeAssets
Fair Value, Inputs, Level 3 [Member]
Changes to the fair value of the Level 3 assets [Roll Forward]
Auction rate security, beginning balance		2.3
Foreign currency derivative, beginning balance		0.7
Auction rate security, ending balance	2.3	2.3
Foreign currency derivative, ending balance	2.8	0.7
Fair Value, Inputs, Level 3 [Member] \| Auction Rate Securities [Member]
Changes to the fair value of the Level 3 assets [Roll Forward]
Changes in fair value included in earnings	0
Fair Value, Inputs, Level 3 [Member] \| Derivative [Member]
Changes to the fair value of the Level 3 assets [Roll Forward]
Changes in fair value included in earnings	$ 2.1

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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