Condensed Consolidated Statements Of Financial Position (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Property, plant and equipment, accumulated depreciation	$ 16,188	$ 15,689
Other assets, accumulated amortization	$ 441	$ 479
Common stock, par value	$ 5.00	$ 5.00
Common stock, authorized	1,200,000,000	1,200,000,000
Common stock, shares issued	1,012,261,159.000000	1,012,261,159.000000
Treasury stock, shares	341,300,206	305,533,606