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Income Taxes (Details Textual) (USD $)	6 Months Ended
Income Taxes (Details Textual) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Income Taxes (Textual) [Abstract]
Net deferred tax is combination of deferred tax liabilities and valuation allowance	$ 1,100,000,000	$ 900,000,000
Tax Reserve	302,000,000
Accrued interest expenses to recognize the estimated tax exposure	125,000,000
Unrecognized tax benefit, affect the effective tax rate	339,000,000	276,000,000
Accruals for payment of interest and penalties associated with uncertain tax positions	$ 140,000,000	$ 130,000,000

Amount of deferred tax liability attributable to taxable temporary differences, net of deferred tax asset attributable to deductible temporary differences and carryforwards net of valuation allowances expected to be realized or consumed within one year or operating cycle, if longer.

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