Consolidated Statements Of Financial Position (Parenthetical) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Statement of Financial Position [Abstract]
Other assets, accumulated amortization	$ 504,000,000	$ 717,000,000
Common stock, par value	$ 5	$ 5
Common Stock, Shares Authorized	1,200,000,000	1,200,000,000
Common stock, shares issued	1,012,261,159	1,012,261,159