CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Statement of Financial Position [Abstract]
Preferred stock, $2 convertible series, par value	$ 1
Preferred stock, $2 convertible series, shares authorized	10,000,000
Preferred stock, $2 convertible series, shares issued	5,268	5,269
Preferred stock, $2 convertible series, shares outstanding	5,268	5,269
Preferred stock, $2 convertible series, liquidation value, per share	$ 50
Common stock, par value	$ 0.1
Common stock, shares authorized	4,500,000,000
Common stock, shares issued	2,200,000,000	2,200,000,000
Treasury stock, shares	515,000,000	501,000,000