Fair Value Measurements - Assets and Liabilities Recorded at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions		Sep. 30, 2025	Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Netting, Assets		$ (9,671)	$ (15,345)
Fair Value	[1]	29,991	24,937
Netting Liabilities		(9,671)	(15,345)
Trading assets	[1]	19,905	21,231
Trading liabilities	[1]	2,477	3,907
Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		4,350	3,521
Trading assets		921	783
Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Trading assets		12,586	13,844
Precious metals trading
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Trading assets		346	163
Trading liabilities		12	70
Home equity mortgages
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		9	10
Corporate loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		179
Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		80	87
Derivatives liability
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Trading liabilities		1,069	2,348
Derivative assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Trading assets		1,141	1,598
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		62,253	65,274
Netting, Assets		(11,585)	(18,270)
Net Balance, Assets		50,668	47,004
Gross Balance, Liabilities		26,569	32,544
Netting Liabilities		(10,807)	(16,636)
Net Balance, Liabilities		15,762	15,908
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		25,373	21,319
Fair Value, Recurring | Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		4,350	3,521
Fair Value, Recurring | Home equity mortgages
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		9	10
Fair Value, Recurring | Corporate loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		179
Fair Value, Recurring | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		80	87
Fair Value, Recurring | Domestic Deposits | Domestic deposits
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		4,728	3,956
Net Balance, Liabilities		4,728	3,956
Fair Value, Recurring | Trading liabilities, excluding derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,408	1,559
Net Balance, Liabilities		1,408	1,559
Fair Value, Recurring | Derivatives liability
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		12,011	19,118
Netting Liabilities		(10,807)	(16,636)
Net Balance, Liabilities		1,204	2,482
Fair Value, Recurring | Derivatives liability | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		533	732
Netting Liabilities		0	0
Net Balance, Liabilities		533	732
Fair Value, Recurring | Derivatives liability | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		8,069	16,241
Netting Liabilities		0	0
Net Balance, Liabilities		8,069	16,241
Fair Value, Recurring | Derivatives liability | Equity contracts - bilateral OTC(2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,062	823
Netting Liabilities		0	0
Net Balance, Liabilities		1,062	823
Fair Value, Recurring | Derivatives liability | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		2,188	1,092
Netting Liabilities		0	0
Net Balance, Liabilities		2,188	1,092
Fair Value, Recurring | Derivatives liability | Credit contracts - bilateral OTC(2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		136	199
Netting Liabilities		0	0
Net Balance, Liabilities		136	199
Fair Value, Recurring | Derivatives liability | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		23	31
Netting Liabilities		0	0
Net Balance, Liabilities		23	31
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		(10,807)	(16,636)
Net Balance, Liabilities		(10,807)	(16,636)
Fair Value, Recurring | Long-term debt | Long-term debt
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		8,411	7,895
Net Balance, Liabilities		8,411	7,895
Fair Value, Recurring | Other liabilities | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		11	16
Net Balance, Liabilities		11	16
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		4,911	4,843
Net Balance, Assets		4,911	4,843
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		921	783
Net Balance, Assets		921	783
Fair Value, Recurring | Trading assets, excluding derivatives | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		12,586	13,844
Net Balance, Assets		12,586	13,844
Fair Value, Recurring | Trading assets, excluding derivatives | Precious metals trading
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		346	163
Net Balance, Assets		346	163
Fair Value, Recurring | Derivative assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		12,812	20,025
Netting, Assets		(11,585)	(18,270)
Net Balance, Assets		1,227	1,755
Fair Value, Recurring | Derivative assets | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		727	1,122
Netting, Assets		0	0
Net Balance, Assets		727	1,122
Fair Value, Recurring | Derivative assets | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		8,708	16,391
Netting, Assets		0	0
Net Balance, Assets		8,708	16,391
Fair Value, Recurring | Derivative assets | Equity contracts - bilateral OTC(2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		1,250	1,016
Netting, Assets		0	0
Net Balance, Assets		1,250	1,016
Fair Value, Recurring | Derivative assets | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		2,027	1,220
Netting, Assets		0	0
Net Balance, Assets		2,027	1,220
Fair Value, Recurring | Derivative assets | Credit contracts - bilateral OTC(2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		95	271
Netting, Assets		0	0
Net Balance, Assets		95	271
Fair Value, Recurring | Derivative assets | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		5	5
Netting, Assets		0	0
Net Balance, Assets		5	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		(11,585)	(18,270)
Net Balance, Assets		(11,585)	(18,270)
Fair Value, Recurring | Loans | Loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		9	11
Net Balance, Assets		9	11
Fair Value, Recurring | Loans | Loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		424	395
Net Balance, Assets		424	395
Fair Value, Recurring | Other assets | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		129	126
Net Balance, Assets		129	126
Fair Value, Recurring | Other assets | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets			16
Net Balance, Assets			16
Fair Value, Recurring | Other assets | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		7	7
Net Balance, Assets		7	7
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		117	124
Net Balance, Assets		117	124
Fair Value, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		35,548	32,542
Gross Balance, Liabilities		1,403	1,491
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		14,537	10,716
Fair Value, Recurring | Level 1 | Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		4,350	3,521
Fair Value, Recurring | Level 1 | Home equity mortgages
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		0	0
Fair Value, Recurring | Level 1 | Corporate loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		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		1,396	1,489
Fair Value, Recurring | Level 1 | Derivatives liability
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		7	2
Fair Value, Recurring | Level 1 | Derivatives liability | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		6	2
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 - bilateral OTC(2)
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		1	0
Fair Value, Recurring | Level 1 | Derivatives liability | Credit contracts - bilateral OTC(2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	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	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		3,606	3,676
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		462	783
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		12,586	13,844
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		7	2
Fair Value, Recurring | Level 1 | Derivative assets | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		7	2
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 - bilateral OTC(2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
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	0
Fair Value, Recurring | Level 1 | Derivative assets | Credit contracts - bilateral OTC(2)
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
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		26,296	32,292
Gross Balance, Liabilities		22,420	28,503
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		10,836	10,603
Fair Value, Recurring | Level 2 | 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 2 | Home equity mortgages
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		0	0
Fair Value, Recurring | Level 2 | Corporate loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		179
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		4,356	3,665
Fair Value, Recurring | Level 2 | Trading liabilities, excluding derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		12	70
Fair Value, Recurring | Level 2 | Derivatives liability
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		11,845	19,010
Fair Value, Recurring | Level 2 | Derivatives liability | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		525	725
Fair Value, Recurring | Level 2 | Derivatives liability | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		8,059	16,236
Fair Value, Recurring | Level 2 | Derivatives liability | Equity contracts - bilateral OTC(2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		939	759
Fair Value, Recurring | Level 2 | Derivatives liability | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		2,187	1,092
Fair Value, Recurring | Level 2 | Derivatives liability | Credit contracts - bilateral OTC(2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		135	198
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		6,207	5,742
Fair Value, Recurring | Level 2 | Other liabilities | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	16
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		1,305	1,167
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		459	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		346	163
Fair Value, Recurring | Level 2 | Derivative assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		12,657	19,965
Fair Value, Recurring | Level 2 | Derivative assets | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		719	1,118
Fair Value, Recurring | Level 2 | Derivative assets | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		8,700	16,386
Fair Value, Recurring | Level 2 | Derivative assets | Equity contracts - bilateral OTC(2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		1,116	970
Fair Value, Recurring | Level 2 | Derivative assets | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		2,027	1,220
Fair Value, Recurring | Level 2 | Derivative assets | Credit contracts - bilateral OTC(2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		95	271
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		9	11
Fair Value, Recurring | Level 2 | Loans | Loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		376	241
Fair Value, Recurring | Level 2 | Other assets | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		129	126
Fair Value, Recurring | Level 2 | Other assets | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets			16
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		292	316
Gross Balance, Liabilities		2,746	2,550
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 mortgages
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		9	10
Fair Value, Recurring | Level 3 | Corporate loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		0
Fair Value, Recurring | Level 3 | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value		80	87
Fair Value, Recurring | Level 3 | Domestic Deposits | Domestic deposits
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		372	291
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		159	106
Fair Value, Recurring | Level 3 | Derivatives liability | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		2	5
Fair Value, Recurring | Level 3 | Derivatives liability | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		10	5
Fair Value, Recurring | Level 3 | Derivatives liability | Equity contracts - bilateral OTC(2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		123	64
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 - bilateral OTC(2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1	1
Fair Value, Recurring | Level 3 | Derivatives liability | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		23	31
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		2,204	2,153
Fair Value, Recurring | Level 3 | Other liabilities | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		11	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		148	58
Fair Value, Recurring | Level 3 | Derivative assets | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		1	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		8	5
Fair Value, Recurring | Level 3 | Derivative assets | Equity contracts - bilateral OTC(2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		134	46
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 - bilateral OTC(2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Derivative assets | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		5	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		48	154
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
Fair Value, Recurring | Level 3 | Other assets | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		7	7
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 September 30, 2025 and December 31, 2024. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 15, "Variable Interest Entities," for additional information. September 30, 2025December 31, 2024(in millions)AssetsOther assets$7 $11 Total assets$7 $11 LiabilitiesInterest, taxes and other liabilities$14 $4 Total liabilities$14 $4