Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Jan. 02, 2015	Oct. 03, 2014
Current assets:
Allowance for doubtful accounts	$ 0.8	$ 0.8
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, par value (usd per share)	$ 0us-gaap_PreferredStockNoParValue	$ 0us-gaap_PreferredStockNoParValue
Preferred stock, shares authorized	25.0us-gaap_PreferredStockSharesAuthorized	25.0us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Common stock, par value (usd per share)	$ 0.25	$ 0.25
Common stock, shares authorized	525.0us-gaap_CommonStockSharesAuthorized	525.0us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	217.1us-gaap_CommonStockSharesIssued	214.2us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	190.8us-gaap_CommonStockSharesOutstanding	189.2us-gaap_CommonStockSharesOutstanding

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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