Purchased Loans (Accretable Yield) (Details) - Purchased Impaired Loans [Member] - USD ($)	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Financing Receivable, Impaired [Line Items]
Beginning Balance	$ 1,558,000,000	$ 2,055,000,000
Accretion (including excess cash recoveries)	(252,000,000)	(309,000,000)
Net reclassifications to accretable from non-accretable	146,000,000	208,000,000
Disposals	(9,000,000)	(18,000,000)
Ending Balance	$ 1,443,000,000	$ 1,936,000,000
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Net reclassifications from nonaccretable - percentage	70.00%	78.00%