CONSOLIDATED BALANCE SHEETS Parentheticals (USD $)	Dec. 31, 2011	Dec. 31, 2010
Balance Sheet Paranthetical [Abstract]
Common shares, par value	$ 2	$ 2
Common shares, shares authorized	6,500,000,000	6,500,000,000
Common shares, shares issued	2,996,000,000	3,008,000,000
Common shares, shares outstanding	2,996,000,000	2,988,000,000