Income Taxes (Details Textuals) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Jun. 30, 2011	Sep. 30, 2011
Income Taxes (Textuals) [Abstract]
Reversal of deferred taxes and liabilities for uncertain tax positions	$ 422,000,000	$ 41,000,000
Taxable income resulting from reversal of previously deducted temporary differences			1,500,000,000
Gain for income tax purposes recognized in connection with settlement			1,030,000,000
Reduction of net operating loss carryover resulting from settlement			2,500,000,000
Regulatory charges, net of tax			199,000,000
Additional tax depreciation			$ 1,030,000,000
Tax benefit due to approved settlement period			15 years