Credit Quality And Allowance For Credit Losses (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Allowance for PCI loans	$ 0	$ 0
Commitments to lend additional funds to TDR borrowers	4	5
Principal Deferrals
Extension Term, Minimum Period	90 days	90 days
Carrying value at period end of loans modified during the period	73	70
Subsequent Default During Period	35	41
Interest Rate Reductions
Extension Term, Minimum Period	90 days	90 days
Carrying value at period end of loans modified during the period	4	4
Subsequent Default During Period	0	0
AB Note Restructures
Extension Term, Minimum Period	90 days	90 days
Carrying value at period end of loans modified during the period	19	18
Subsequent Default During Period	$ 0	$ 0