Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Apr. 01, 2017	Sep. 24, 2016
Statement of Financial Position [Abstract]
Accounts receivable, reserves	$ 10.2	$ 12.7
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	1,623,000	1,623,000
Preferred stock, issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	750,000,000	750,000,000
Common stock, issued (in shares)	0	285,015,000
Treasury stock (in shares)	7,289,000	7,289,000