Loans - Delinquency Ratio for Consumer Loan (Detail) - USD ($) $ in Millions		Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Total	[1]	$ 58,987	$ 59,380
Loans carried at lower of amortized cost or fair value of collateral less cost to sell		61	60
Consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		2,726	2,975
One year prior to current year		2,841	4,302
Two years prior to current year		4,125	2,982
Three years prior to current year		2,799	1,361
Four years prior to current year		1,272	764
Prior		5,061	4,954
Revolving Loans		206	225
Total		19,030	17,563
Loans in process of foreclosure		21	21
Consumer loans | Residential mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		2,646	2,887
One year prior to current year		2,764	4,280
Two years prior to current year		4,107	2,949
Three years prior to current year		2,770	1,323
Four years prior to current year		1,244	751
Prior		4,810	4,648
Revolving Loans		0	0
Total		18,341	16,838
Consumer loans | Home equity mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		80	74
One year prior to current year		69	12
Two years prior to current year		11	24
Three years prior to current year		22	32
Four years prior to current year		25	13
Prior		182	215
Revolving Loans		0	0
Total		389	370
Consumer loans | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0	0
One year prior to current year		0	0
Two years prior to current year		0	0
Three years prior to current year		0	0
Four years prior to current year		0	0
Prior		0	0
Revolving Loans		199	213
Total		199	213
Consumer loans | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0	14
One year prior to current year		8	10
Two years prior to current year		7	9
Three years prior to current year		7	6
Four years prior to current year		3	0
Prior		69	91
Revolving Loans		7	12
Total		101	142
Consumer loans | Summary of Two Months and Over Contractual Delinquency
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0	6
One year prior to current year		2	4
Two years prior to current year		6	8
Three years prior to current year		6	16
Four years prior to current year		1	10
Prior		106	102
Revolving Loans		4	4
Total		125	150
Consumer loans | Summary of Two Months and Over Contractual Delinquency | Residential mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0	6
One year prior to current year		2	4
Two years prior to current year		6	8
Three years prior to current year		6	16
Four years prior to current year		1	10
Prior		100	97
Revolving Loans		0	0
Total		115	141
Consumer loans | Summary of Two Months and Over Contractual Delinquency | Home equity mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0	0
One year prior to current year		0	0
Two years prior to current year		0	0
Three years prior to current year		0	0
Four years prior to current year		0	0
Prior		4	3
Revolving Loans		0	0
Total		4	3
Consumer loans | Summary of Two Months and Over Contractual Delinquency | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0	0
One year prior to current year		0	0
Two years prior to current year		0	0
Three years prior to current year		0	0
Four years prior to current year		0	0
Prior		0	0
Revolving Loans		4	3
Total		4	3
Consumer loans | Summary of Two Months and Over Contractual Delinquency | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0	0
One year prior to current year		0	0
Two years prior to current year		0	0
Three years prior to current year		0	0
Four years prior to current year		0	0
Prior		2	2
Revolving Loans		0	1
Total		$ 2	$ 3

[1] The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2023 and 2022. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31,20232022(in millions)AssetsLoans, net$— $162 Other assets23 44 Total assets$23 $206 LiabilitiesInterest, taxes and other liabilities$17 $22 Total liabilities$17 $22