Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 26, 2015	Dec. 27, 2014
Accounts receivable, allowances	$ 31.8	$ 34.5
Long-term receivables, allowances	$ 11.9	$ 13.1
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	200,000,000	200,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	600,000,000	600,000,000
Common stock, shares issued	63,607,090	63,607,090
Treasury stock, shares	13,590,146	13,924,568