Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Sep. 27, 2014	Sep. 28, 2013
Statement of Financial Position [Abstract]
Accounts receivable, reserves	$ 12.0	$ 8.8
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	1,623	1,623
Preferred stock, issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	750,000	750,000
Common stock, issued (in shares)	277,972	272,036
Treasury stock (in shares)	0	219