Loans - Consumer, Excluding Credit Card Loans, PCI Loans (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans retained	$ 735,304	$ 724,177	$ 722,471
Consumer, excluding credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans retained	288,379	288,449	288,211
Consumer, excluding credit card | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans retained	17,572	18,927
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	1,758	1,758
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	18,262	19,830
Percentage of Loans Thirty Plus Days Past Due to Total Unpaid Principal Balance	8.05%	8.55%
Consumer, excluding credit card | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans retained	10,887	12,038
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	1,530	1,726
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	10,646	11,876
Percentage of Loans Thirty Plus Days Past Due to Total Unpaid Principal Balance	13.65%	14.80%
Consumer, excluding credit card | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans retained	3,790	4,175
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	180	180
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	4,832	5,471
Percentage of Loans Thirty Plus Days Past Due to Total Unpaid Principal Balance	24.13%	26.67%
Consumer, excluding credit card | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans retained	16,238	17,915
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	194	494
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	17,128	19,223
Percentage of Loans Thirty Plus Days Past Due to Total Unpaid Principal Balance	16.79%	19.36%
Consumer, excluding credit card | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans retained	48,487	53,055
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	3,662	4,158
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	50,868	56,400
Percentage of Loans Thirty Plus Days Past Due to Total Unpaid Principal Balance	13.69%	15.31%
Consumer, excluding credit card | California | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	10,984	11,937
Consumer, excluding credit card | California | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	6,186	6,845
Consumer, excluding credit card | California | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	1,170	1,293
Consumer, excluding credit card | California | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	9,483	10,419
Consumer, excluding credit card | California | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	27,823	30,494
Consumer, excluding credit card | New York | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	897	962
Consumer, excluding credit card | New York | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	699	807
Consumer, excluding credit card | New York | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	482	563
Consumer, excluding credit card | New York | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	984	1,196
Consumer, excluding credit card | New York | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	3,062	3,528
Consumer, excluding credit card | Illinois | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	416	451
Consumer, excluding credit card | Illinois | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	313	353
Consumer, excluding credit card | Illinois | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	240	283
Consumer, excluding credit card | Illinois | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	412	481
Consumer, excluding credit card | Illinois | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	1,381	1,568
Consumer, excluding credit card | Florida | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	1,738	1,865
Consumer, excluding credit card | Florida | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	719	826
Consumer, excluding credit card | Florida | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	455	526
Consumer, excluding credit card | Florida | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	1,523	1,817
Consumer, excluding credit card | Florida | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	4,435	5,034
Consumer, excluding credit card | Texas | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	287	327
Consumer, excluding credit card | Texas | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	95	106
Consumer, excluding credit card | Texas | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	289	328
Consumer, excluding credit card | Texas | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	89	100
Consumer, excluding credit card | Texas | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	760	861
Consumer, excluding credit card | New Jersey | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	354	381
Consumer, excluding credit card | New Jersey | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	293	334
Consumer, excluding credit card | New Jersey | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	177	213
Consumer, excluding credit card | New Jersey | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	594	701
Consumer, excluding credit card | New Jersey | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	1,418	1,629
Consumer, excluding credit card | Arizona | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	333	361
Consumer, excluding credit card | Arizona | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	171	187
Consumer, excluding credit card | Arizona | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	88	95
Consumer, excluding credit card | Arizona | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	239	264
Consumer, excluding credit card | Arizona | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	831	907
Consumer, excluding credit card | Washington | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	988	1,072
Consumer, excluding credit card | Washington | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	233	266
Consumer, excluding credit card | Washington | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	99	112
Consumer, excluding credit card | Washington | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	410	463
Consumer, excluding credit card | Washington | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	1,730	1,913
Consumer, excluding credit card | Michigan | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	56	62
Consumer, excluding credit card | Michigan | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	172	189
Consumer, excluding credit card | Michigan | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	134	145
Consumer, excluding credit card | Michigan | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	188	206
Consumer, excluding credit card | Michigan | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	550	602
Consumer, excluding credit card | Ohio | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	21	23
Consumer, excluding credit card | Ohio | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	49	55
Consumer, excluding credit card | Ohio | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	75	84
Consumer, excluding credit card | Ohio | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	70	75
Consumer, excluding credit card | Ohio | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	215	237
Consumer, excluding credit card | All other | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	2,188	2,389
Consumer, excluding credit card | All other | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	1,716	1,908
Consumer, excluding credit card | All other | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	1,623	1,829
Consumer, excluding credit card | All other | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	3,136	3,501
Consumer, excluding credit card | All other | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	8,663	9,627
Consumer, excluding credit card | Current | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	16,792	18,135
Consumer, excluding credit card | Current | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	9,193	10,118
Consumer, excluding credit card | Current | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	3,666	4,012
Consumer, excluding credit card | Current | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	14,253	15,501
Consumer, excluding credit card | Current | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	43,904	47,766
Consumer, excluding credit card | 30–149 days past due | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	442	583
Consumer, excluding credit card | 30–149 days past due | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	527	589
Consumer, excluding credit card | 30–149 days past due | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	572	662
Consumer, excluding credit card | 30–149 days past due | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	843	1,006
Consumer, excluding credit card | 30–149 days past due | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	2,384	2,840
Consumer, excluding credit card | 150 or more days past due | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	1,028	1,112
Consumer, excluding credit card | 150 or more days past due | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	926	1,169
Consumer, excluding credit card | 150 or more days past due | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	594	797
Consumer, excluding credit card | 150 or more days past due | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	2,032	2,716
Consumer, excluding credit card | 150 or more days past due | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	4,580	5,794
Consumer, excluding credit card | Equal to or greater than 660 | Greater than 125% and refreshed FICO scores: | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	482	1,168
Consumer, excluding credit card | Equal to or greater than 660 | Greater than 125% and refreshed FICO scores: | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	38	240
Consumer, excluding credit card | Equal to or greater than 660 | Greater than 125% and refreshed FICO scores: | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	38	115
Consumer, excluding credit card | Equal to or greater than 660 | Greater than 125% and refreshed FICO scores: | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	88	301
Consumer, excluding credit card | Equal to or greater than 660 | Greater than 125% and refreshed FICO scores: | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	646	1,824
Consumer, excluding credit card | Equal to or greater than 660 | 101% to 125% and refreshed FICO scores: | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	2,112	3,248
Consumer, excluding credit card | Equal to or greater than 660 | 101% to 125% and refreshed FICO scores: | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	447	1,017
Consumer, excluding credit card | Equal to or greater than 660 | 101% to 125% and refreshed FICO scores: | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	205	316
Consumer, excluding credit card | Equal to or greater than 660 | 101% to 125% and refreshed FICO scores: | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	540	1,164
Consumer, excluding credit card | Equal to or greater than 660 | 101% to 125% and refreshed FICO scores: | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	3,304	5,745
Consumer, excluding credit card | Equal to or greater than 660 | 80% to 100% and refreshed FICO scores: | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	4,257	4,473
Consumer, excluding credit card | Equal to or greater than 660 | 80% to 100% and refreshed FICO scores: | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	2,099	2,787
Consumer, excluding credit card | Equal to or greater than 660 | 80% to 100% and refreshed FICO scores: | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	509	544
Consumer, excluding credit card | Equal to or greater than 660 | 80% to 100% and refreshed FICO scores: | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	2,334	3,311
Consumer, excluding credit card | Equal to or greater than 660 | 80% to 100% and refreshed FICO scores: | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	9,199	11,115
Consumer, excluding credit card | Equal to or greater than 660 | Less than 80% and refreshed FICO scores: | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	6,291	5,077
Consumer, excluding credit card | Equal to or greater than 660 | Less than 80% and refreshed FICO scores: | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	3,962	2,897
Consumer, excluding credit card | Equal to or greater than 660 | Less than 80% and refreshed FICO scores: | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	760	521
Consumer, excluding credit card | Equal to or greater than 660 | Less than 80% and refreshed FICO scores: | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	6,962	5,671
Consumer, excluding credit card | Equal to or greater than 660 | Less than 80% and refreshed FICO scores: | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	17,975	14,166
Consumer, excluding credit card | Less than 660 | Greater than 125% and refreshed FICO scores: | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	258	662
Consumer, excluding credit card | Less than 660 | Greater than 125% and refreshed FICO scores: | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	85	290
Consumer, excluding credit card | Less than 660 | Greater than 125% and refreshed FICO scores: | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	156	459
Consumer, excluding credit card | Less than 660 | Greater than 125% and refreshed FICO scores: | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	151	575
Consumer, excluding credit card | Less than 660 | Greater than 125% and refreshed FICO scores: | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	650	1,986
Consumer, excluding credit card | Less than 660 | 101% to 125% and refreshed FICO scores: | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	1,004	1,541
Consumer, excluding credit card | Less than 660 | 101% to 125% and refreshed FICO scores: | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	388	884
Consumer, excluding credit card | Less than 660 | 101% to 125% and refreshed FICO scores: | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	514	919
Consumer, excluding credit card | Less than 660 | 101% to 125% and refreshed FICO scores: | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	738	1,563
Consumer, excluding credit card | Less than 660 | 101% to 125% and refreshed FICO scores: | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	2,644	4,907
Consumer, excluding credit card | Less than 660 | 80% to 100% and refreshed FICO scores: | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	1,714	1,782
Consumer, excluding credit card | Less than 660 | 80% to 100% and refreshed FICO scores: | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	1,330	1,699
Consumer, excluding credit card | Less than 660 | 80% to 100% and refreshed FICO scores: | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	1,044	1,197
Consumer, excluding credit card | Less than 660 | 80% to 100% and refreshed FICO scores: | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	2,038	2,769
Consumer, excluding credit card | Less than 660 | 80% to 100% and refreshed FICO scores: | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	6,126	7,447
Consumer, excluding credit card | Less than 660 | Less than 80% and refreshed FICO scores: | PCI - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	2,144	1,879
Consumer, excluding credit card | Less than 660 | Less than 80% and refreshed FICO scores: | PCI - Prime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	2,297	2,062
Consumer, excluding credit card | Less than 660 | Less than 80% and refreshed FICO scores: | PCI - Subprime Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	1,606	1,400
Consumer, excluding credit card | Less than 660 | Less than 80% and refreshed FICO scores: | PCI - Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	4,277	3,869
Consumer, excluding credit card | Less than 660 | Less than 80% and refreshed FICO scores: | Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	$ 10,324	$ 9,210