Loans - Summary of TDRs in Consumer Portfolio (Detail) - USD ($) $ in Millions		Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Impaired [Line Items]
Total	[1]	$ 58,610	$ 55,864
Consumer loans:
Financing Receivable, Impaired [Line Items]
2022		954	4,521
2021		4,422	3,343
2020		3,189	1,531
2019		1,447	891
2018		827	987
Prior		5,110	4,589
Revolving Loans		207	206
Total		16,156	16,068
Consumer loans: | Residential mortgages
Financing Receivable, Impaired [Line Items]
2022		949	4,498
2021		4,397	3,305
2020		3,149	1,496
2019		1,412	872
2018		808	969
Prior		4,858	4,329
Revolving Loans		0	0
Total		15,573	15,469
Consumer loans: | Home equity mortgages
Financing Receivable, Impaired [Line Items]
2022		5	15
2021		16	30
2020		32	30
2019		30	18
2018		17	17
Prior		206	215
Revolving Loans		0	0
Total		306	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		205	204
Total		205	204
Consumer loans: | Troubled Debt Restructuring
Financing Receivable, Impaired [Line Items]
2022		0	0
2021		0	1
2020		1	3
2019		7	3
2018		3	0
Prior		120	127
Revolving Loans		3	3
Total		134	137
Consumer loans: | Troubled Debt Restructuring | Residential mortgages
Financing Receivable, Impaired [Line Items]
2022		0	0
2021		0	1
2020		1	3
2019		7	3
2018		3	0
Prior		111	118
Revolving Loans		0	0
Total		122	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		9	9
Revolving Loans		0	0
Total		9	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		3	3
Total		$ 3	$ 3

[1] The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at March 31, 2022 and December 31, 2021. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 17, "Variable Interest Entities," for additional information. March 31, 2022December 31, 2021(in millions)AssetsLoans$128 $46 Other assets51 55 Total assets$179 $101 LiabilitiesInterest, taxes and other liabilities$31 $9 Total liabilities$31 $9