Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jan. 01, 2016	Jan. 02, 2015
Preferred stock, no par value	$ 0	$ 0
Preferred stock, shares authorized	3,000,000	3,000,000
Preferred stock, shares outstanding	0	0
Common stock, no par value	$ 0	$ 0
Common stock, shares authorized	360,000,000	360,000,000
Common stock, shares issued	250,700,000	259,200,000
Common stock, shares outstanding	250,700,000	259,200,000
Allowance for Doubtful Accounts [Member]
Accounts receivable, allowance for doubtful accounts	$ 5.0	$ 7.8
Allowance for Sales Returns [Member]
Accounts receivable, allowance for doubtful accounts	$ 5.1	$ 3.6