Consolidated Balance Sheets (Unaudited) Parenthetical (USD $) In Thousands, except Share data, unless otherwise specified	Jul. 01, 2012	Dec. 25, 2011	Jun. 26, 2011
Current assets
Accounts receivable, allowance for doubtful accounts	$ 24,300	$ 23,700	$ 34,700
Property, plant and equipment, accumulated depreciation	472,000	453,700	449,790
Other assets
Other intangibles, accumulated amortization	$ 638,300	$ 622,500	$ 597,300
Shareholders' equity
Preference stock, par value (in dollars per share)	$ 2.50	$ 2.50	$ 2.50
Preference stock, authorized shares (in shares)	5,000,000	5,000,000	5,000,000
Preference stock, issued (in shares)	0	0	0
Common stock, par value (in dollars per share)	$ 0.50	$ 0.50	$ 0.50
Common stock, authorized shares (in shares)	600,000,000	600,000,000	600,000,000
Common stock, issued (in shares)	209,694,630	209,694,630	209,694,630
Treasury stock, at cost; shares (in shares)	79,440,495	81,061,373	74,738,456