Condensed Consolidated Statements Of Financial Position (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Property, plant and equipment, accumulated depreciation	$ 15,645	$ 15,070
Other assets, accumulated amortization	$ 447	$ 448
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	298,419,764	264,882,461