Earnings Per Common Share (Details Textual) (USD $)	3 Months Ended
	Mar. 31, 2011
Earning Per common Share (Detail Textual) [Abstract]
Dividends, Preferred Stock, One Time	$ 49,000,000
Series B Preferred Stock [Member]
Earning Per common Share (Detail Textual) [Abstract]
Repurchase of the Fixed-Rate Perpetual Preferred Stock	$ 2,500,000,000