Consolidated Balance Sheets (Unaudited) Parenthetical (USD $) In Thousands, except Share data	Jun. 26, 2011	Dec. 26, 2010	Jun. 27, 2010
Current assets
Accounts receivable, allowance for doubtful accounts	$ 34,700	$ 31,200	$ 32,200
Property, plant and equipment, accumulated depreciation	449,790	430,200	435,800
Other assets
Other intangibles, accumulated amortization	$ 597,300	$ 586,900	$ 566,400
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)	74,738,456	72,278,515	68,422,439