Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Millions	Sep. 27, 2015	Sep. 28, 2014
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 26.0	$ 22.2
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, authorized	1	1
Preferred stock, issued	0	0
Common stock, par value	$ 0.20	$ 0.20
Common stock, authorized	250,000	250,000
Common stock, issued	95,100	95,600
Common stock, outstanding	95,100	95,600