CONSOLIDATED BALANCE SHEETS Parentheticals (USD $) In Millions, except Share data	Sep. 30, 2011	Dec. 31, 2010
Balance Sheet Parenthetical [Abstract]
Accounts and notes receivable, allowance for doubtful accounts	$ 211	$ 197
Common shares, par value	$ 2	$ 2
Common shares, shares authorized	6,500,000,000	6,500,000,000
Common shares, shares issued	2,994,000,000	3,008,000,000
Common shares, shares outstanding	2,994,000,000	2,988,000,000