Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 28, 2015	Sep. 27, 2014
Statement of Financial Position [Abstract]
Accounts receivable, reserves	$ 11.8	$ 12.0
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	1,623,000us-gaap_PreferredStockSharesAuthorized	1,623,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, issued (in shares)	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	750,000,000us-gaap_CommonStockSharesAuthorized	750,000,000us-gaap_CommonStockSharesAuthorized
Common stock, issued (in shares)	280,923,000us-gaap_CommonStockSharesIssued	277,972,000us-gaap_CommonStockSharesIssued

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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