Loans and ACL (Narrative) (Details) (USD $)	1 Months Ended
	Sep. 30, 2014	Jan. 31, 2014
Loans, expiration of loss share	$ 741,000,000
UPB, expiration of loss share	1,000,000,000
Retail Residential Mortgage-Nonguaranteed, Excluding Covered [Member]
Loans sold	550,000,000
Allowance for loan and lease losses, loans sold	57,000,000
Gain on sale of residential mortgage loans	42,000,000
Loans transferred in		8,300,000,000
Direct Retail Lending, Excluding Covered [Member]
Loans transferred out		$ 8,300,000,000