Loans - Summary of TDRs in Consumer Portfolio (Detail) - USD ($) $ in Millions		Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Impaired [Line Items]
Total	[1]	$ 61,775	$ 55,864
Consumer loans
Financing Receivable, Impaired [Line Items]
2022		2,521	4,521
2021		4,347	3,343
2020		3,019	1,531
2019		1,379	891
2018		785	987
Prior		5,057	4,589
Revolving Loans		200	206
Total		17,308	16,068
Consumer loans | Residential mortgages
Financing Receivable, Impaired [Line Items]
2022		2,478	4,498
2021		4,328	3,305
2020		2,982	1,496
2019		1,342	872
2018		768	969
Prior		4,793	4,329
Revolving Loans		0	0
Total		16,691	15,469
Consumer loans | Home equity mortgages
Financing Receivable, Impaired [Line Items]
2022		33	15
2021		13	30
2020		30	30
2019		32	18
2018		17	17
Prior		220	215
Revolving Loans		0	0
Total		345	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		198	204
Total		198	204
Consumer loans | Troubled Debt Restructuring
Financing Receivable, Impaired [Line Items]
2022		0	0
2021		0	1
2020		2	3
2019		9	3
2018		4	0
Prior		134	127
Revolving Loans		2	3
Total		151	137
Consumer loans | Troubled Debt Restructuring | Residential mortgages
Financing Receivable, Impaired [Line Items]
2022		0	0
2021		0	1
2020		2	3
2019		9	3
2018		4	0
Prior		122	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		12	9
Revolving Loans		0	0
Total		12	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 September 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. September 30, 2022December 31, 2021(in millions)AssetsLoans$127 $46 Other assets44 55 Total assets$171 $101 LiabilitiesInterest, taxes and other liabilities$26 $9 Total liabilities$26 $9