CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Jun. 28, 2013	Dec. 28, 2012
Accounts receivable, allowances	$ 1.0	$ 1.3
Preferred stock, authorized	5,000,000	5,000,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, authorized	1,000,000,000	1,000,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares issued	511,434,268	508,846,484
Treasury stock, shares	155,790,325	141,284,352