CONSOLIDATED BALANCE SHEET (Parenthetical) (USD $)	Dec. 31, 2011	Dec. 31, 2010
CONSOLIDATED BALANCE SHEET
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, Authorized shares	500,000,000	500,000,000
Common stock, Issued shares	126,937,817	126,627,875
Common stock held in treasury, shares	23,953,971	18,953,971