Unaudited Condensed Consolidated Balance Sheet (Parenthetical) Statement (USD $)	Sep. 30, 2011	Dec. 31, 2010
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	243,767,641	242,019,650
Common stock, shares outstanding	227,998,397	241,035,250