Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $) In Millions, except Per Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Doubtful accounts and allowances (in Dollars)	$ 31	$ 26
Accumulated depreciation (in Dollars)	$ 7,683	$ 7,652
Common stock par value (in Dollars per share)	$ 0.50	$ 0.50
Common stock, shares authorized (in Shares)	3,800	3,800
Common stock, shares issued (in Shares)	1,656	1,649
Treasury stock, at cost, shares held (in Shares)	196	179