Business Combinations (Narrative) (Details) (USD $)			3 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Texas branch acquistion [Member]
Total deposits	$ 131,586,000,000	$ 127,475,000,000	$ 1,200,000,000
Acquired Loans			112,000,000
Cash and other assets			1,100,000,000
Acquired goodwill			31,000,000
Finite-Lived Intangible Assets, Net	$ 552,000,000	$ 569,000,000	$ 20,000,000