Subsequent Events (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Oct. 22, 2014	Oct. 16, 2014 Subsequent Event [Member] Series G Preferred Stock [Member]	Oct. 16, 2014 Subsequent Event [Member] Series A Preferred Stock [Member]
Subsequent Event [Line Items]
Dividends Payable, Amount Per Share							$ 17.89	$ 0.53
Dividends Payable							$ 46	$ 22
Debt Instrument, Repurchase Amount						750
Gains (Losses) on Extinguishment of Debt	$ (160)	$ 0	$ (42)	$ (46)	$ (42)