Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 28, 2015	Dec. 28, 2014
Statement of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$ 20,722	$ 16,498
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, Authorized shares	2,000,000	2,000,000
Preferred stock, Issued shares	0	0
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, Authorized shares	800,000,000	800,000,000
Common stock, Issued shares	324,418,632	324,418,632
Treasury stock, shares	97,946,786	97,679,541
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 57,600	$ 60,000
Variable Interest Entity Consolidated Carrying Amount, Liabilities Subject to Recourse	$ 2,900	$ 4,300