Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended			12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2015 Subsequent Event [Member]
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Unrecognized Tax Benefits	$ 1,043		$ 1,043		$ 1,069
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	933		933		939
Reported tax rate	(1343.20%)	87.60%	(296.00%)	18.90%
Gross interest and penalties recognized in period			43
Net tax expense/benefits related to interest and penalties	9	9	28	28
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	445		445		402
Potential Reduction In Unrecognized Tax Benefits Over Next Twelve Months As Result Of Concluding Certain Matters						$ 9