Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 29, 2013	Dec. 30, 2012
Current assets
Accounts receivable, allowance for doubtful accounts	$ 19,000	$ 19,600
Shareholders' equity
Preference stock, par value (in dollars per share)	$ 2.50	$ 2.50
Preference stock, authorized shares (in shares)	5,000,000	5,000,000
Preference stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.50	$ 0.50
Common stock, authorized shares (in shares)	600,000,000	600,000,000
Common stock, issued (in shares)	209,694,630	209,694,630
Treasury stock, at cost, shares (in shares)	78,640,228	80,754,417