Fair Value Measurements - Assets and Liabilities Recorded at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions		Mar. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Netting, Assets		$ (11,660)	$ (14,110)
Fair Value	[1]	25,550	25,696
Netting Liabilities		(11,660)	(14,110)
Trading assets	[1]	18,900	22,115
Trading liabilities	[1]	2,546	3,485
Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		3,196	2,469
Trading assets		1,053	4,019
Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Trading assets		12,273	11,702
Precious metals trading
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Trading assets		329	346
Trading liabilities		38	301
Home equity
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		11	12
Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		91	92
Derivatives liability
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Trading liabilities		1,298	1,496
Derivative assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Trading assets		821	1,276
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		59,113	64,268
Netting, Assets		(13,371)	(15,870)
Net Balance, Assets		45,742	48,398
Gross Balance, Liabilities		25,116	28,622
Netting Liabilities		(12,740)	(15,431)
Net Balance, Liabilities		12,376	13,191
Fair Value, Recurring | U.S. Treasury, U.S. Government agencies and sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		22,252	23,123
Fair Value, Recurring | Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		3,196	2,469
Fair Value, Recurring | Home equity
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		11	12
Fair Value, Recurring | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		91	92
Fair Value, Recurring | Domestic Deposits | Domestic deposits
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		2,084	1,821
Net Balance, Liabilities		2,084	1,821
Fair Value, Recurring | Trading liabilities, excluding derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,248	1,989
Net Balance, Liabilities		1,248	1,989
Fair Value, Recurring | Derivatives liability
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		14,253	17,263
Netting Liabilities		(12,740)	(15,431)
Net Balance, Liabilities		1,513	1,832
Fair Value, Recurring | Derivatives liability | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,023	1,122
Netting Liabilities		0	0
Net Balance, Liabilities		1,023	1,122
Fair Value, Recurring | Derivatives liability | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		10,570	13,535
Netting Liabilities		0	0
Net Balance, Liabilities		10,570	13,535
Fair Value, Recurring | Derivatives liability | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,261	1,273
Netting Liabilities		0	0
Net Balance, Liabilities		1,261	1,273
Fair Value, Recurring | Derivatives liability | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,136	1,033
Netting Liabilities		0	0
Net Balance, Liabilities		1,136	1,033
Fair Value, Recurring | Derivatives liability | Credit contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		229	260
Netting Liabilities		0	0
Net Balance, Liabilities		229	260
Fair Value, Recurring | Derivatives liability | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		34	40
Netting Liabilities		0	0
Net Balance, Liabilities		34	40
Fair Value, Recurring | Derivatives liability | Derivatives netting
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Netting Liabilities		(12,740)	(15,431)
Net Balance, Liabilities		(12,740)	(15,431)
Fair Value, Recurring | Long-term debt | Long-term debt
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		6,870	7,539
Net Balance, Liabilities		6,870	7,539
Fair Value, Recurring | Other liabilities | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		661	10
Net Balance, Liabilities		661	10
Fair Value, Recurring | Trading assets, excluding derivatives | U.S. Treasury, U.S. Government agencies and sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		4,424	4,772
Net Balance, Assets		4,424	4,772
Fair Value, Recurring | Trading assets, excluding derivatives | Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		1,053	4,019
Net Balance, Assets		1,053	4,019
Fair Value, Recurring | Trading assets, excluding derivatives | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		12,273	11,702
Net Balance, Assets		12,273	11,702
Fair Value, Recurring | Trading assets, excluding derivatives | Precious metals trading
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		329	346
Net Balance, Assets		329	346
Fair Value, Recurring | Derivative assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		14,259	17,169
Netting, Assets		(13,371)	(15,870)
Net Balance, Assets		888	1,299
Fair Value, Recurring | Derivative assets | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		1,331	1,255
Netting, Assets		0	0
Net Balance, Assets		1,331	1,255
Fair Value, Recurring | Derivative assets | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		10,507	13,606
Netting, Assets		0	0
Net Balance, Assets		10,507	13,606
Fair Value, Recurring | Derivative assets | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		1,048	1,041
Netting, Assets		0	0
Net Balance, Assets		1,048	1,041
Fair Value, Recurring | Derivative assets | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		1,222	1,153
Netting, Assets		0	0
Net Balance, Assets		1,222	1,153
Fair Value, Recurring | Derivative assets | Credit contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		147	109
Netting, Assets		0	0
Net Balance, Assets		147	109
Fair Value, Recurring | Derivative assets | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		4	5
Netting, Assets		0	0
Net Balance, Assets		4	5
Fair Value, Recurring | Derivative assets | Derivatives netting
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Netting, Assets		(13,371)	(15,870)
Net Balance, Assets		(13,371)	(15,870)
Fair Value, Recurring | Loans | Loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		14	15
Net Balance, Assets		14	15
Fair Value, Recurring | Loans | Loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		264	250
Net Balance, Assets		264	250
Fair Value, Recurring | Other assets | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		125	127
Net Balance, Assets		125	127
Fair Value, Recurring | Other assets | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		661	10
Net Balance, Assets		661	10
Fair Value, Recurring | Other assets | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		19	19
Net Balance, Assets		19	19
Fair Value, Recurring | Other assets | Equity securities measured at net asset value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		142	143
Net Balance, Assets		142	143
Fair Value, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		27,888	29,460
Gross Balance, Liabilities		1,214	1,704
Fair Value, Recurring | Level 1 | U.S. Treasury, U.S. Government agencies and sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		8,018	7,799
Fair Value, Recurring | Level 1 | Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		3,085	2,359
Fair Value, Recurring | Level 1 | Home equity
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		0	0
Fair Value, Recurring | Level 1 | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		0	0
Fair Value, Recurring | Level 1 | Domestic Deposits | Domestic deposits
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 1 | Trading liabilities, excluding derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,210	1,688
Fair Value, Recurring | Level 1 | Derivatives liability
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		4	16
Fair Value, Recurring | Level 1 | Derivatives liability | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		4	16
Fair Value, Recurring | Level 1 | Derivatives liability | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 1 | Derivatives liability | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 1 | Derivatives liability | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 1 | Derivatives liability | Credit contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities			0
Fair Value, Recurring | Level 1 | Derivatives liability | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities			0
Fair Value, Recurring | Level 1 | Derivatives liability | Derivatives netting
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 1 | Long-term debt | Long-term debt
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 1 | Other liabilities | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 1 | Trading assets, excluding derivatives | U.S. Treasury, U.S. Government agencies and sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		3,462	3,564
Fair Value, Recurring | Level 1 | Trading assets, excluding derivatives | Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		1,045	4,019
Fair Value, Recurring | Level 1 | Trading assets, excluding derivatives | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		12,273	11,702
Fair Value, Recurring | Level 1 | Trading assets, excluding derivatives | Precious metals trading
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Derivative assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		5	17
Fair Value, Recurring | Level 1 | Derivative assets | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		5	7
Fair Value, Recurring | Level 1 | Derivative assets | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Derivative assets | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	7
Fair Value, Recurring | Level 1 | Derivative assets | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	3
Fair Value, Recurring | Level 1 | Derivative assets | Credit contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Derivative assets | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Derivative assets | Derivatives netting
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Loans | Loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Loans | Loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Other assets | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Other assets | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Other assets | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Other assets | Equity securities measured at net asset value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		30,707	34,310
Gross Balance, Liabilities		21,416	24,489
Fair Value, Recurring | Level 2 | U.S. Treasury, U.S. Government agencies and sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		14,234	15,324
Fair Value, Recurring | Level 2 | Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		111	110
Fair Value, Recurring | Level 2 | Home equity
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		0	0
Fair Value, Recurring | Level 2 | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		0	0
Fair Value, Recurring | Level 2 | Domestic Deposits | Domestic deposits
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,753	1,528
Fair Value, Recurring | Level 2 | Trading liabilities, excluding derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		38	301
Fair Value, Recurring | Level 2 | Derivatives liability
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		14,053	17,030
Fair Value, Recurring | Level 2 | Derivatives liability | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,011	1,100
Fair Value, Recurring | Level 2 | Derivatives liability | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		10,559	13,534
Fair Value, Recurring | Level 2 | Derivatives liability | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,118	1,104
Fair Value, Recurring | Level 2 | Derivatives liability | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,136	1,033
Fair Value, Recurring | Level 2 | Derivatives liability | Credit contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		229	259
Fair Value, Recurring | Level 2 | Derivatives liability | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 2 | Derivatives liability | Derivatives netting
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 2 | Long-term debt | Long-term debt
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		4,911	5,620
Fair Value, Recurring | Level 2 | Other liabilities | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		661	10
Fair Value, Recurring | Level 2 | Trading assets, excluding derivatives | U.S. Treasury, U.S. Government agencies and sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		962	1,208
Fair Value, Recurring | Level 2 | Trading assets, excluding derivatives | Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		8	0
Fair Value, Recurring | Level 2 | Trading assets, excluding derivatives | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 2 | Trading assets, excluding derivatives | Precious metals trading
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		329	346
Fair Value, Recurring | Level 2 | Derivative assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		14,024	16,952
Fair Value, Recurring | Level 2 | Derivative assets | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		1,321	1,246
Fair Value, Recurring | Level 2 | Derivative assets | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		10,496	13,605
Fair Value, Recurring | Level 2 | Derivative assets | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		838	844
Fair Value, Recurring | Level 2 | Derivative assets | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		1,222	1,150
Fair Value, Recurring | Level 2 | Derivative assets | Credit contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		147	107
Fair Value, Recurring | Level 2 | Derivative assets | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 2 | Derivative assets | Derivatives netting
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 2 | Loans | Loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		14	15
Fair Value, Recurring | Level 2 | Loans | Loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		239	218
Fair Value, Recurring | Level 2 | Other assets | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		125	127
Fair Value, Recurring | Level 2 | Other assets | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		661	10
Fair Value, Recurring | Level 2 | Other assets | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 2 | Other assets | Equity securities measured at net asset value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		376	355
Gross Balance, Liabilities		2,486	2,429
Fair Value, Recurring | Level 3 | U.S. Treasury, U.S. Government agencies and sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		0	0
Fair Value, Recurring | Level 3 | Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		0	0
Fair Value, Recurring | Level 3 | Home equity
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		11	12
Fair Value, Recurring | Level 3 | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		91	92
Fair Value, Recurring | Level 3 | Domestic Deposits | Domestic deposits
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		331	293
Fair Value, Recurring | Level 3 | Trading liabilities, excluding derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 3 | Derivatives liability
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		196	217
Fair Value, Recurring | Level 3 | Derivatives liability | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		8	6
Fair Value, Recurring | Level 3 | Derivatives liability | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		11	1
Fair Value, Recurring | Level 3 | Derivatives liability | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		143	169
Fair Value, Recurring | Level 3 | Derivatives liability | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 3 | Derivatives liability | Credit contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	1
Fair Value, Recurring | Level 3 | Derivatives liability | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		34	40
Fair Value, Recurring | Level 3 | Derivatives liability | Derivatives netting
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 3 | Long-term debt | Long-term debt
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,959	1,919
Fair Value, Recurring | Level 3 | Other liabilities | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 3 | Trading assets, excluding derivatives | U.S. Treasury, U.S. Government agencies and sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Trading assets, excluding derivatives | Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Trading assets, excluding derivatives | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Trading assets, excluding derivatives | Precious metals trading
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Derivative assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		230	200
Fair Value, Recurring | Level 3 | Derivative assets | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		5	2
Fair Value, Recurring | Level 3 | Derivative assets | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		11	1
Fair Value, Recurring | Level 3 | Derivative assets | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		210	190
Fair Value, Recurring | Level 3 | Derivative assets | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Derivative assets | Credit contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	2
Fair Value, Recurring | Level 3 | Derivative assets | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		4	5
Fair Value, Recurring | Level 3 | Derivative assets | Derivatives netting
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Loans | Loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Loans | Loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		25	32
Fair Value, Recurring | Level 3 | Other assets | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Other assets | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Other assets | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		19	19
Fair Value, Recurring | Level 3 | Other assets | Equity securities measured at net asset value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		$ 0	$ 0

[1] The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at March 31, 2024 and December 31, 2023. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 15, "Variable Interest Entities," for additional information. March 31, 2024December 31, 2023(in millions)AssetsOther assets$21 $23 Total assets$21 $23 LiabilitiesInterest, taxes and other liabilities$28 $17 Total liabilities$28 $17