Condensed Consolidated Statements Of Financial Position (Parenthetical) (USD $) In Millions, except Share data	Sep. 30, 2011	Dec. 31, 2010
Condensed Consolidated Statements Of Financial Position [Abstract]
Property, plant and equipment, accumulated depreciation	$ 13,778	$ 13,322
Other assets, accumulated amortization	$ 697	$ 630
Common stock, par value	$ 5.00	$ 5.00
Common stock, authorized	1,200,000,000	1,200,000,000
Common stock, shares issued	1,012,261,159	1,012,261,159
Treasury stock, shares	269,377,718	277,002,059