Loans - Consumer, Excluding Credit Card Loan Portfolio, PCI Loans (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	$ 928,887	$ 969,415	$ 947,651
Consumer, excluding credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	331,809	373,637	$ 375,958
Consumer, excluding credit card | Total PCI
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	197,456	231,078
Unpaid principal balance of impaired loans	5,578	6,207
Consumer, excluding credit card | Total PCI | California
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	66,166	74,759
Consumer, excluding credit card | Total PCI | Florida
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	10,195	10,704
Consumer, excluding credit card | Total PCI | New York
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	25,442	28,847
Consumer, excluding credit card | Total PCI | Illinois
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	13,304	15,249
Consumer, excluding credit card | Total PCI | Washington
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	7,638	8,304
Consumer, excluding credit card | Total PCI | New Jersey
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	5,749	7,302
Consumer, excluding credit card | Total PCI | Massachusetts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	5,610	6,574
Consumer, excluding credit card | Total PCI | Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	3,862	4,434
Consumer, excluding credit card | Total PCI | All other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	39,568	52,996
Consumer, excluding credit card | Total PCI | No FICO/LTV available
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	952	813
Consumer, excluding credit card | Total PCI | Greater than 125% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	25	25
Consumer, excluding credit card | Total PCI | Greater than 125% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	20	13
Consumer, excluding credit card | Total PCI | 101% to 125% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	22	37
Consumer, excluding credit card | Total PCI | 101% to 125% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	35	53
Consumer, excluding credit card | Total PCI | 80% to 100% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	4,650	3,977
Consumer, excluding credit card | Total PCI | 80% to 100% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	212	281
Consumer, excluding credit card | Total PCI | Lower than 80% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	185,438	212,505
Consumer, excluding credit card | Total PCI | Lower than 80% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	6,035	6,457
Consumer, excluding credit card | Total PCI | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	196,354	225,899
Consumer, excluding credit card | Total PCI | 30–149 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	691	2,763
Consumer, excluding credit card | Total PCI | 150 or more days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	411	2,416
Consumer, excluding credit card | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	24,954	28,340
Unpaid principal balance of impaired loans	3,355	3,466
Consumer, excluding credit card | Home equity | California
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	5,074	5,695
Consumer, excluding credit card | Home equity | Florida
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	1,366	1,575
Consumer, excluding credit card | Home equity | New York
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	5,074	5,769
Consumer, excluding credit card | Home equity | Illinois
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	1,868	2,131
Consumer, excluding credit card | Home equity | Washington
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	762	869
Consumer, excluding credit card | Home equity | New Jersey
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	1,447	1,642
Consumer, excluding credit card | Home equity | Massachusetts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	208	236
Consumer, excluding credit card | Home equity | Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	986	1,158
Consumer, excluding credit card | Home equity | All other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	6,071	6,925
Consumer, excluding credit card | Home equity | No FICO/LTV available
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	710	885
Consumer, excluding credit card | Home equity | Greater than 125% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	4	6
Consumer, excluding credit card | Home equity | Greater than 125% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	2	1
Consumer, excluding credit card | Home equity | 101% to 125% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	68	111
Consumer, excluding credit card | Home equity | 101% to 125% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	23	38
Consumer, excluding credit card | Home equity | 80% to 100% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	697	986
Consumer, excluding credit card | Home equity | 80% to 100% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	214	326
Consumer, excluding credit card | Home equity | Lower than 80% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	20,394	22,632
Consumer, excluding credit card | Home equity | Lower than 80% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	2,842	3,355
Consumer, excluding credit card | Home equity | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	24,398	27,611
Consumer, excluding credit card | Home equity | 30–149 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	355	453
Consumer, excluding credit card | Home equity | 150 or more days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	201	276
Consumer, excluding credit card | Residential real estate – PCI | Total PCI
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	21,290	24,034
Unpaid principal balance of impaired loans	$ 21,974	$ 24,741
% of 30 days past due to total loans	8.56%	9.16%
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | California
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	$ 11,888	$ 13,389
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | Florida
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	2,008	2,255
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | New York
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	1,508	1,660
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | Illinois
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	642	709
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | Washington
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	626	738
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | New Jersey
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	604	690
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | Massachusetts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	444	491
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | Maryland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	382	417
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | Virginia
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	354	393
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	336	389
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | All other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	3,182	3,610
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | No FICO/LTV available
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	785	951
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | Greater than 125% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	18	21
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | Greater than 125% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	28	36
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | 101% to 125% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	127	162
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | 101% to 125% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	107	155
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | 80% to 100% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	855	1,053
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | 80% to 100% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	579	851
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | Lower than 80% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	13,331	14,087
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | Lower than 80% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	6,144	7,425
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	20,093	22,475
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | 30–149 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	1,084	1,221
Consumer, excluding credit card | Residential real estate – PCI | Total PCI | 150 or more days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	797	1,045
Consumer, excluding credit card | Residential real estate – PCI | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	7,753	8,963
Unpaid principal balance of impaired loans	$ 7,942	$ 9,144
% of 30 days past due to total loans	5.02%	5.69%
Consumer, excluding credit card | Residential real estate – PCI | Home equity | California
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	$ 4,704	$ 5,420
Consumer, excluding credit card | Residential real estate – PCI | Home equity | Florida
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	865	976
Consumer, excluding credit card | Residential real estate – PCI | Home equity | New York
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	469	525
Consumer, excluding credit card | Residential real estate – PCI | Home equity | Illinois
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	207	233
Consumer, excluding credit card | Residential real estate – PCI | Home equity | Washington
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	348	419
Consumer, excluding credit card | Residential real estate – PCI | Home equity | New Jersey
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	184	210
Consumer, excluding credit card | Residential real estate – PCI | Home equity | Massachusetts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	56	65
Consumer, excluding credit card | Residential real estate – PCI | Home equity | Maryland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	43	48
Consumer, excluding credit card | Residential real estate – PCI | Home equity | Virginia
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	47	54
Consumer, excluding credit card | Residential real estate – PCI | Home equity | Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	138	165
Consumer, excluding credit card | Residential real estate – PCI | Home equity | All other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	881	1,029
Consumer, excluding credit card | Residential real estate – PCI | Home equity | No FICO/LTV available
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	219	265
Consumer, excluding credit card | Residential real estate – PCI | Home equity | Greater than 125% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	13	17
Consumer, excluding credit card | Residential real estate – PCI | Home equity | Greater than 125% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	10	13
Consumer, excluding credit card | Residential real estate – PCI | Home equity | 101% to 125% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	96	135
Consumer, excluding credit card | Residential real estate – PCI | Home equity | 101% to 125% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	46	65
Consumer, excluding credit card | Residential real estate – PCI | Home equity | 80% to 100% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	643	805
Consumer, excluding credit card | Residential real estate – PCI | Home equity | 80% to 100% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	271	388
Consumer, excluding credit card | Residential real estate – PCI | Home equity | Lower than 80% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	5,031	5,548
Consumer, excluding credit card | Residential real estate – PCI | Home equity | Lower than 80% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	1,613	1,908
Consumer, excluding credit card | Residential real estate – PCI | Home equity | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	7,543	8,624
Consumer, excluding credit card | Residential real estate – PCI | Home equity | 30–149 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	234	278
Consumer, excluding credit card | Residential real estate – PCI | Home equity | 150 or more days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	165	242
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	4,164	4,690
Unpaid principal balance of impaired loans	$ 4,183	$ 4,708
% of 30 days past due to total loans	10.14%	10.24%
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | California
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	$ 2,280	$ 2,578
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | Florida
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	295	332
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | New York
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	338	365
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | Illinois
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	139	154
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | Washington
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	85	98
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | New Jersey
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	117	134
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | Massachusetts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	103	113
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | Maryland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	89	95
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | Virginia
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	82	91
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	60	69
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | All other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	595	679
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | No FICO/LTV available
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	179	228
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | Greater than 125% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	2	1
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | Greater than 125% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	6	7
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | 101% to 125% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	6	6
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | 101% to 125% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	19	22
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | 80% to 100% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	58	75
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | 80% to 100% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	71	112
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | Lower than 80% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	2,559	2,689
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | Lower than 80% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	1,283	1,568
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	3,759	4,226
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | 30–149 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	241	259
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Prime mortgage | 150 or more days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	183	223
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	1,797	1,945
Unpaid principal balance of impaired loans	$ 2,261	$ 2,442
% of 30 days past due to total loans	15.30%	16.75%
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | California
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	$ 549	$ 593
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | Florida
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	218	234
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | New York
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	249	268
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | Illinois
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	115	123
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | Washington
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	38	44
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | New Jersey
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	81	88
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | Massachusetts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	69	73
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | Maryland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	90	96
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | Virginia
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	35	37
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	39	43
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | All other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	778	843
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | No FICO/LTV available
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	98	113
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | Greater than 125% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	0	0
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | Greater than 125% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	7	9
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | 101% to 125% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	7	4
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | 101% to 125% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	24	35
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | 80% to 100% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	52	54
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | 80% to 100% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	109	161
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | Lower than 80% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	809	739
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | Lower than 80% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	1,155	1,327
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	1,915	2,033
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | 30–149 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	247	286
Consumer, excluding credit card | Residential real estate – PCI | Mortgage | Subprime mortgage | 150 or more days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	99	123
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	7,576	8,436
Unpaid principal balance of impaired loans	$ 7,588	$ 8,447
% of 30 days past due to total loans	9.38%	10.12%
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | California
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	$ 4,355	$ 4,798
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | Florida
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	630	713
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | New York
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	452	502
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | Illinois
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	181	199
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | Washington
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	155	177
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | New Jersey
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	222	258
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | Massachusetts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	216	240
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | Maryland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	160	178
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | Virginia
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	190	211
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	99	112
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | All other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	928	1,059
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | No FICO/LTV available
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	289	345
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | Greater than 125% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	3	3
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | Greater than 125% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	5	7
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | 101% to 125% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	18	17
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | 101% to 125% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	18	33
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | 80% to 100% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	102	119
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | 80% to 100% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	128	190
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | Lower than 80% and refreshed FICO scores | Equal to or greater than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	4,932	5,111
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | Lower than 80% and refreshed FICO scores | Less than 660
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	2,093	2,622
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	6,876	7,592
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | 30–149 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	362	398
Consumer, excluding credit card | Residential real estate – PCI | Option ARMs | 150 or more days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans	$ 350	$ 457