Asset Quality (Consumer Real Estate Secured Asset Quality Indicators) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Financing Receivable, Recorded Investment [Line Items]
Purchased impaired loans	$ 5,167,000,000	$ 6,106,000,000	$ 6,398,000,000
Pennsylvania [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage Of Higher Risk Loans	12.00%	12.00%
New Jersey [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage Of Higher Risk Loans	14.00%	13.00%
Illinois [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage Of Higher Risk Loans	12.00%	12.00%
Percentage Of Purchased Impaired Loans	11.00%	11.00%
Ohio [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage Of Higher Risk Loans	11.00%	11.00%
Percentage Of Purchased Impaired Loans	8.00%	8.00%
California [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage Of Higher Risk Loans	4.00%	4.00%
Percentage Of Purchased Impaired Loans	17.00%	17.00%
Florida [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage Of Higher Risk Loans	9.00%	9.00%
Percentage Of Purchased Impaired Loans	15.00%	16.00%
Maryland [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage Of Higher Risk Loans	5.00%	5.00%
Michigan [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage Of Higher Risk Loans	5.00%	5.00%
Percentage Of Purchased Impaired Loans	5.00%	5.00%
North Carolina [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage Of Purchased Impaired Loans	7.00%	8.00%
All Other States Maximum [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage Of Higher Risk Loans	4.00%	4.00%
Percentage Of Purchased Impaired Loans	4.00%	4.00%
All Other States [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage Of Higher Risk Loans	28.00%	29.00%
Percentage Of Purchased Impaired Loans	37.00%	35.00%
Home Equity [Member] | 1st Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	17,540,000,000	17,654,000,000
Purchased Impaired Loans - Outstanding Balance	292,000,000	312,000,000
Home Equity [Member] | 2nd Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	15,450,000,000	16,482,000,000
Purchased Impaired Loans - Outstanding Balance	1,952,000,000	2,211,000,000
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	10,392,000,000	10,240,000,000
Purchased Impaired Loans - Outstanding Balance	2,551,000,000	3,025,000,000
Government insured or guaranteed residential real estate mortgages	1,262,000,000	1,704,000,000
Total home equity and residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	43,382,000,000	44,376,000,000
Purchased Impaired Loans - Outstanding Balance	4,795,000,000	5,548,000,000
Government insured or guaranteed residential real estate mortgages	1,262,000,000	1,704,000,000
Purchased impaired loans	4,762,000,000	5,432,000,000
LTV greater than or equal to 125% and updated FICO scores | FICO greater than 660 | Home Equity [Member] | 1st Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	373,000,000	438,000,000
Purchased Impaired Loans - Outstanding Balance	9,000,000	13,000,000
LTV greater than or equal to 125% and updated FICO scores | FICO greater than 660 | Home Equity [Member] | 2nd Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	1,564,000,000	1,914,000,000
Purchased Impaired Loans - Outstanding Balance	309,000,000	435,000,000
LTV greater than or equal to 125% and updated FICO scores | FICO greater than 660 | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	420,000,000	563,000,000
Purchased Impaired Loans - Outstanding Balance	311,000,000	361,000,000
LTV greater than or equal to 125% and updated FICO scores | FICO greater than 660 | Total home equity and residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	2,357,000,000	2,915,000,000
Purchased Impaired Loans - Outstanding Balance	629,000,000	809,000,000
LTV greater than or equal to 125% and updated FICO scores | FICO less than or equal to 660 | Home Equity [Member] | 1st Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	61,000,000	74,000,000
Purchased Impaired Loans - Outstanding Balance	8,000,000	15,000,000
LTV greater than or equal to 125% and updated FICO scores | FICO less than or equal to 660 | Home Equity [Member] | 2nd Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	309,000,000	399,000,000
Purchased Impaired Loans - Outstanding Balance	150,000,000	215,000,000
LTV greater than or equal to 125% and updated FICO scores | FICO less than or equal to 660 | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	111,000,000	185,000,000
Purchased Impaired Loans - Outstanding Balance	176,000,000	296,000,000
LTV greater than or equal to 125% and updated FICO scores | FICO less than or equal to 660 | Total home equity and residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	481,000,000	658,000,000
Purchased Impaired Loans - Outstanding Balance	334,000,000	526,000,000
LTV greater than or equal to 125% and updated FICO scores | Missing FICO | Home Equity [Member] | 1st Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	2,000,000	1,000,000
LTV greater than or equal to 125% and updated FICO scores | Missing FICO | Home Equity [Member] | 2nd Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	10,000,000	11,000,000
Purchased Impaired Loans - Outstanding Balance	8,000,000	12,000,000
LTV greater than or equal to 125% and updated FICO scores | Missing FICO | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	8,000,000	20,000,000
Purchased Impaired Loans - Outstanding Balance	6,000,000	24,000,000
LTV greater than or equal to 125% and updated FICO scores | Missing FICO | Total home equity and residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	20,000,000	32,000,000
Purchased Impaired Loans - Outstanding Balance	14,000,000	36,000,000
LTV greater than or equal to 100% to less than 125% and updated FICO scores | FICO greater than 660 | Home Equity [Member] | 1st Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	894,000,000	987,000,000
Purchased Impaired Loans - Outstanding Balance	16,000,000	21,000,000
LTV greater than or equal to 100% to less than 125% and updated FICO scores | FICO greater than 660 | Home Equity [Member] | 2nd Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	2,369,000,000	2,794,000,000
Purchased Impaired Loans - Outstanding Balance	472,000,000	516,000,000
LTV greater than or equal to 100% to less than 125% and updated FICO scores | FICO greater than 660 | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	837,000,000	1,005,000,000
Purchased Impaired Loans - Outstanding Balance	306,000,000	373,000,000
LTV greater than or equal to 100% to less than 125% and updated FICO scores | FICO greater than 660 | Total home equity and residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	4,100,000,000	4,786,000,000
Purchased Impaired Loans - Outstanding Balance	794,000,000	910,000,000
LTV greater than or equal to 100% to less than 125% and updated FICO scores | FICO less than or equal to 660 | Home Equity [Member] | 1st Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	123,000,000	150,000,000
Purchased Impaired Loans - Outstanding Balance	15,000,000	15,000,000
LTV greater than or equal to 100% to less than 125% and updated FICO scores | FICO less than or equal to 660 | Home Equity [Member] | 2nd Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	411,000,000	501,000,000
Purchased Impaired Loans - Outstanding Balance	211,000,000	239,000,000
LTV greater than or equal to 100% to less than 125% and updated FICO scores | FICO less than or equal to 660 | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	181,000,000	210,000,000
Purchased Impaired Loans - Outstanding Balance	227,000,000	281,000,000
LTV greater than or equal to 100% to less than 125% and updated FICO scores | FICO less than or equal to 660 | Total home equity and residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	715,000,000	861,000,000
Purchased Impaired Loans - Outstanding Balance	453,000,000	535,000,000
LTV greater than or equal to 100% to less than 125% and updated FICO scores | Missing FICO | Home Equity [Member] | 1st Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	3,000,000	2,000,000
LTV greater than or equal to 100% to less than 125% and updated FICO scores | Missing FICO | Home Equity [Member] | 2nd Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	5,000,000	5,000,000
Purchased Impaired Loans - Outstanding Balance	12,000,000	14,000,000
LTV greater than or equal to 100% to less than 125% and updated FICO scores | Missing FICO | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	14,000,000	32,000,000
Purchased Impaired Loans - Outstanding Balance	7,000,000	14,000,000
LTV greater than or equal to 100% to less than 125% and updated FICO scores | Missing FICO | Total home equity and residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	22,000,000	39,000,000
Purchased Impaired Loans - Outstanding Balance	19,000,000	28,000,000
LTV greater than or equal to 90% to less than 100% and updated FICO scores | FICO greater than 660 | Home Equity [Member] | 1st Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	946,000,000	1,047,000,000
Purchased Impaired Loans - Outstanding Balance	14,000,000	15,000,000
LTV greater than or equal to 90% to less than 100% and updated FICO scores | FICO greater than 660 | Home Equity [Member] | 2nd Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	1,790,000,000	1,916,000,000
Purchased Impaired Loans - Outstanding Balance	206,000,000	202,000,000
LTV greater than or equal to 90% to less than 100% and updated FICO scores | FICO greater than 660 | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	821,000,000	844,000,000
Purchased Impaired Loans - Outstanding Balance	185,000,000	197,000,000
LTV greater than or equal to 90% to less than 100% and updated FICO scores | FICO greater than 660 | Total home equity and residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	3,557,000,000	3,807,000,000
Purchased Impaired Loans - Outstanding Balance	405,000,000	414,000,000
LTV greater than or equal to 90% to less than 100% and updated FICO scores | FICO less than or equal to 660 | Home Equity [Member] | 1st Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	109,000,000	134,000,000
Purchased Impaired Loans - Outstanding Balance	9,000,000	12,000,000
LTV greater than or equal to 90% to less than 100% and updated FICO scores | FICO less than or equal to 660 | Home Equity [Member] | 2nd Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	273,000,000	298,000,000
Purchased Impaired Loans - Outstanding Balance	94,000,000	101,000,000
LTV greater than or equal to 90% to less than 100% and updated FICO scores | FICO less than or equal to 660 | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	116,000,000	131,000,000
Purchased Impaired Loans - Outstanding Balance	130,000,000	163,000,000
LTV greater than or equal to 90% to less than 100% and updated FICO scores | FICO less than or equal to 660 | Total home equity and residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	498,000,000	563,000,000
Purchased Impaired Loans - Outstanding Balance	233,000,000	276,000,000
LTV greater than or equal to 90% to less than 100% and updated FICO scores | Missing FICO | Home Equity [Member] | 1st Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	1,000,000	2,000,000
LTV greater than or equal to 90% to less than 100% and updated FICO scores | Missing FICO | Home Equity [Member] | 2nd Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	3,000,000	3,000,000
Purchased Impaired Loans - Outstanding Balance	6,000,000	7,000,000
LTV greater than or equal to 90% to less than 100% and updated FICO scores | Missing FICO | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	8,000,000	22,000,000
Purchased Impaired Loans - Outstanding Balance	5,000,000	6,000,000
LTV greater than or equal to 90% to less than 100% and updated FICO scores | Missing FICO | Total home equity and residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	12,000,000	27,000,000
Purchased Impaired Loans - Outstanding Balance	11,000,000	13,000,000
LTV less than 90% and updated FICO scores | FICO greater than 660 | Home Equity [Member] | 1st Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	13,704,000,000	13,445,000,000
Purchased Impaired Loans - Outstanding Balance	102,000,000	93,000,000
LTV less than 90% and updated FICO scores | FICO greater than 660 | Home Equity [Member] | 2nd Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	7,738,000,000	7,615,000,000
Purchased Impaired Loans - Outstanding Balance	291,000,000	261,000,000
LTV less than 90% and updated FICO scores | FICO greater than 660 | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	7,175,000,000	6,309,000,000
Purchased Impaired Loans - Outstanding Balance	616,000,000	646,000,000
LTV less than 90% and updated FICO scores | FICO greater than 660 | Total home equity and residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	28,617,000,000	27,369,000,000
Purchased Impaired Loans - Outstanding Balance	1,009,000,000	1,000,000,000
LTV less than 90% and updated FICO scores | FICO less than or equal to 660 | Home Equity [Member] | 1st Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	1,298,000,000	1,349,000,000
Purchased Impaired Loans - Outstanding Balance	111,000,000	126,000,000
LTV less than 90% and updated FICO scores | FICO less than or equal to 660 | Home Equity [Member] | 2nd Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	964,000,000	1,009,000,000
Purchased Impaired Loans - Outstanding Balance	182,000,000	198,000,000
LTV less than 90% and updated FICO scores | FICO less than or equal to 660 | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	585,000,000	662,000,000
Purchased Impaired Loans - Outstanding Balance	531,000,000	590,000,000
LTV less than 90% and updated FICO scores | FICO less than or equal to 660 | Total home equity and residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	2,847,000,000	3,020,000,000
Purchased Impaired Loans - Outstanding Balance	824,000,000	914,000,000
LTV less than 90% and updated FICO scores | Missing FICO | Home Equity [Member] | 1st Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	26,000,000	25,000,000
Purchased Impaired Loans - Outstanding Balance	1,000,000	1,000,000
LTV less than 90% and updated FICO scores | Missing FICO | Home Equity [Member] | 2nd Liens
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	14,000,000	17,000,000
Purchased Impaired Loans - Outstanding Balance	11,000,000	11,000,000
LTV less than 90% and updated FICO scores | Missing FICO | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	115,000,000	256,000,000
Purchased Impaired Loans - Outstanding Balance	20,000,000	47,000,000
LTV less than 90% and updated FICO scores | Missing FICO | Total home equity and residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	155,000,000	298,000,000
Purchased Impaired Loans - Outstanding Balance	32,000,000	59,000,000
Missing LTV and updated FICO scores | FICO greater than 660 | Home Equity [Member] | 1st Liens
Financing Receivable, Recorded Investment [Line Items]
Purchased Impaired Loans - Outstanding Balance	2,000,000	1,000,000
Missing LTV and updated FICO scores | FICO greater than 660 | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	1,000,000	1,000,000
Purchased Impaired Loans - Outstanding Balance	14,000,000	11,000,000
Missing LTV and updated FICO scores | FICO greater than 660 | Total home equity and residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans - Excluding Purchased Impaired Loans	1,000,000	1,000,000
Purchased Impaired Loans - Outstanding Balance	16,000,000	12,000,000
Missing LTV and updated FICO scores | FICO less than or equal to 660 | Home Equity [Member] | 1st Liens
Financing Receivable, Recorded Investment [Line Items]
Purchased Impaired Loans - Outstanding Balance	4,000,000
Missing LTV and updated FICO scores | FICO less than or equal to 660 | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Purchased Impaired Loans - Outstanding Balance	15,000,000	13,000,000
Missing LTV and updated FICO scores | FICO less than or equal to 660 | Total home equity and residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Purchased Impaired Loans - Outstanding Balance	19,000,000	13,000,000
Missing LTV and updated FICO scores | Missing FICO | Home Equity [Member] | 1st Liens
Financing Receivable, Recorded Investment [Line Items]
Purchased Impaired Loans - Outstanding Balance	1,000,000
Missing LTV and updated FICO scores | Missing FICO | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Purchased Impaired Loans - Outstanding Balance	2,000,000	3,000,000
Missing LTV and updated FICO scores | Missing FICO | Total home equity and residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Purchased Impaired Loans - Outstanding Balance	$ 3,000,000	$ 3,000,000