CONSOLIDATED STATEMENT OF FINANCIAL POSITION (Parenthetical) (USD $)	Dec. 31, 2011	Dec. 31, 2010
CONSOLIDATED STATEMENT OF FINANCIAL POSITION [Abstract]
Common stock, par value (in dollars per share)	$ 2.50	$ 2.50
Common stock, shares authorized (in shares)	950,000,000	950,000,000
Common stock, shares issued (in shares)	391,292,760	391,292,760
Common stock, shares outstanding (in shares)	271,379,883	268,898,978
Treasury stock, at cost (in shares)	119,912,877	122,393,782