Guarantee Arrangements, Pledged Assets and Repurchase Agreements - Summary of Pledged Assets Included in Consolidated Balance Sheet (Detail) - USD ($) $ in Millions		Jun. 30, 2023		Dec. 31, 2022		Jun. 30, 2022
Financial Instruments Owned and Pledged as Collateral [Line Items]
Interest bearing deposits with banks	[1]	$ 29,476		$ 17,744
Trading assets	[1]	19,391		21,730
Fair Value	[1]	26,259		27,345
Securities held-to-maturity	[1]	13,428		7,317
Loans, net	[1]	57,945		59,380
Other assets	[1]	6,182		6,754
Total assets		166,928	[1]	164,655	[1]	$ 171,232
Asset Pledged as Collateral
Financial Instruments Owned and Pledged as Collateral [Line Items]
Interest bearing deposits with banks		595		878
Trading assets		1,795		1,255
Fair Value		3,459		3,179
Securities held-to-maturity		616		466
Loans, net		17,696		17,530
Other assets		1,028		1,319
Total assets		$ 25,189		$ 24,627

[1] The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at June 30, 2023 and December 31, 2022. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 17, "Variable Interest Entities," for additional information. June 30, 2023December 31, 2022(in millions)AssetsLoans, net$186 $162 Other assets40 44 Total assets$226 $206 LiabilitiesInterest, taxes and other liabilities$35 $22 Total liabilities$35 $22