Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 29, 2012	Dec. 31, 2011
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares unissued	10,000,000	10,000,000
Common stock, par value (USD per share)	$ 2.5	$ 2.5
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	176,906,265	176,091,572
Cost of common stock in treasury, shares	16,954,238	7,044,611