Loans - Summary of TDRs in Consumer Portfolio (Detail) - USD ($) $ in Millions		Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Impaired [Line Items]
Total	[1]	$ 61,798	$ 55,864
Consumer loans
Financing Receivable, Impaired [Line Items]
2022		1,907	4,521
2021		4,398	3,343
2020		3,100	1,531
2019		1,402	891
2018		807	987
Prior		5,281	4,589
Revolving Loans		208	206
Total		17,103	16,068
Consumer loans | Residential mortgages
Financing Receivable, Impaired [Line Items]
2022		1,883	4,498
2021		4,376	3,305
2020		3,059	1,496
2019		1,365	872
2018		787	969
Prior		5,005	4,329
Revolving Loans		0	0
Total		16,475	15,469
Consumer loans | Home equity mortgages
Financing Receivable, Impaired [Line Items]
2022		19	15
2021		16	30
2020		34	30
2019		32	18
2018		18	17
Prior		232	215
Revolving Loans		0	0
Total		351	325
Consumer loans | Credit cards
Financing Receivable, Impaired [Line Items]
2022		0	0
2021		0	0
2020		0	0
2019		0	0
2018		0	0
Prior		0	0
Revolving Loans		204	204
Total		204	204
Consumer loans | Troubled Debt Restructuring
Financing Receivable, Impaired [Line Items]
2022		0	0
2021		0	1
2020		1	3
2019		8	3
2018		3	0
Prior		138	127
Revolving Loans		2	3
Total		152	137
Consumer loans | Troubled Debt Restructuring | Residential mortgages
Financing Receivable, Impaired [Line Items]
2022		0	0
2021		0	1
2020		1	3
2019		8	3
2018		3	0
Prior		125	118
Revolving Loans		0	0
Total		137	125
Consumer loans | Troubled Debt Restructuring | Home equity mortgages
Financing Receivable, Impaired [Line Items]
2022		0	0
2021		0	0
2020		0	0
2019		0	0
2018		0	0
Prior		13	9
Revolving Loans		0	0
Total		13	9
Consumer loans | Troubled Debt Restructuring | Credit cards
Financing Receivable, Impaired [Line Items]
2022		0	0
2021		0	0
2020		0	0
2019		0	0
2018		0	0
Prior		0	0
Revolving Loans		2	3
Total		$ 2	$ 3

[1] The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at June 30, 2022 and December 31, 2021. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 17, "Variable Interest Entities," for additional information. June 30, 2022December 31, 2021(in millions)AssetsLoans$118 $46 Other assets46 55 Total assets$164 $101 LiabilitiesInterest, taxes and other liabilities$28 $9 Total liabilities$28 $9