Consolidated Balance Sheet (Parenthetical) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Consolidated Balance Sheet [Abstract]
Common stock, par value	$ 0.125	$ 0.125
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	115,761,840	115,761,840
Common stock, shares outstanding	80,889,882	80,210,365
Treasury stock, shares at cost	34,871,958	35,551,475