Off-balance Sheet Lending-related Financial Instruments, Guarantees, and Other Commitments (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	$ 1,556,962	$ 1,497,847
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	1,131,902
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	209,419
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	178,426
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	37,215
Off-balance sheet lending-related financial commitments, Carrying value	3,823	4,139
Total Consumer
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	1,011,942	961,061
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	986,848
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	7,514
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	5,461
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	12,119
Off-balance sheet lending-related financial commitments, Carrying value	692	826
Total consumer, excluding credit card
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	47,215	45,403
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	22,121
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	7,514
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	5,461
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	12,119
Off-balance sheet lending-related financial commitments, Carrying value	692	826
Residential real estate
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	32,853	30,125
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	11,225
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	7,493
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	5,461
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	8,674
Off-balance sheet lending-related financial commitments, Carrying value	623	678
Residential real estate | First Republic
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet lending-related financial commitments, Carrying value	550	630
Auto and other
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	14,362	15,278
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	10,896
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	21
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	0
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	3,445
Off-balance sheet lending-related financial commitments, Carrying value	69	148
Auto and other | First Republic
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet lending-related financial commitments, Carrying value	69	148
Credit card
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	964,727	915,658
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	964,727
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	0
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	0
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	0
Off-balance sheet lending-related financial commitments, Carrying value	0	0
Total wholesale
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	545,020	536,786
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	145,054
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	201,905
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	172,965
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	25,096
Off-balance sheet lending-related financial commitments, Carrying value	3,131	3,313
Other unfunded commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	511,650	503,526
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	124,757
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	192,737
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	169,714
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	24,442
Off-balance sheet lending-related financial commitments, Carrying value	2,692	2,797
Off balance sheet lending related financial instruments guarantees and other commitments - supplemental information
Risk participations for other unfunded commitments to extend credit	90	88
Other unfunded commitments to extend credit | First Republic
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet lending-related financial commitments, Carrying value	854	1,100
Standby letters of credit and other financial guarantees
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	29,124	28,872
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	16,443
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	8,919
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	3,209
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	553
Off-balance sheet lending-related financial commitments, Carrying value	403	479
Other guarantees and commitments, Carrying value	296	369
Off balance sheet lending related financial instruments guarantees and other commitments - supplemental information
Risk participations for standby letters of credit and other financial guarantees	9,900	8,200
Other letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	4,246	4,388
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	3,854
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	249
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	42
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	101
Off-balance sheet lending-related financial commitments, Carrying value	36	37
Other guarantees and commitments, Carrying value	0	0
Off balance sheet lending related financial instruments guarantees and other commitments - supplemental information
Risk participations for other letters of credit	372	589
Securities lending indemnification agreements and guarantees
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other guarantees and commitments, Contractual amount	319,353	283,664
Other guarantees and commitments, Contractual amount, Expiring in 1 year or less	319,353
Other guarantees and commitments, Contractual amount, Expiring after 1 year through 3 years	0
Other guarantees and commitments, Contractual amount, Expiring after 3 years through 5 years	0
Other guarantees and commitments, Contractual amount, Expiring after 5 years	0
Other guarantees and commitments, Carrying value	0	0
Off balance sheet lending related financial instruments guarantees and other commitments - supplemental information
Indemnification agreement securities lending guarantees collateral held in support of	339,500	300,300
Derivatives qualifying as guarantees
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other guarantees and commitments, Contractual amount	52,901	54,562
Other guarantees and commitments, Contractual amount, Expiring in 1 year or less	1,435
Other guarantees and commitments, Contractual amount, Expiring after 1 year through 3 years	77
Other guarantees and commitments, Contractual amount, Expiring after 3 years through 5 years	10,479
Other guarantees and commitments, Contractual amount, Expiring after 5 years	40,910
Other guarantees and commitments, Carrying value	88	89
Unsettled resale and securities borrowed agreements
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other guarantees and commitments, Contractual amount	154,482	95,106
Other guarantees and commitments, Contractual amount, Expiring in 1 year or less	154,224
Other guarantees and commitments, Contractual amount, Expiring after 1 year through 3 years	258
Other guarantees and commitments, Contractual amount, Expiring after 3 years through 5 years	0
Other guarantees and commitments, Contractual amount, Expiring after 5 years	0
Other guarantees and commitments, Carrying value	1	0
Unsettled repurchase and securities loaned agreements
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other guarantees and commitments, Contractual amount	107,938	60,724
Other guarantees and commitments, Contractual amount, Expiring in 1 year or less	107,401
Other guarantees and commitments, Contractual amount, Expiring after 1 year through 3 years	537
Other guarantees and commitments, Contractual amount, Expiring after 3 years through 5 years	0
Other guarantees and commitments, Contractual amount, Expiring after 5 years	0
Other guarantees and commitments, Carrying value	0	0
Mortgage repurchase liability
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loan sale and securitization-related indemnifications, Mortgage repurchase liability, Carrying value	60	76
Loans sold with recourse
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loan sale and securitization-related indemnifications, Loans sold with recourse, Contractual amount	825	803
Loan sale and securitization-related indemnifications, Loans sold with recourse, Carrying value	23	24
Exchange & clearing house guarantees and commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other guarantees and commitments, Contractual amount	124,661	265,887
Other guarantees and commitments, Contractual amount, Expiring in 1 year or less	124,661
Other guarantees and commitments, Contractual amount, Expiring after 1 year through 3 years	0
Other guarantees and commitments, Contractual amount, Expiring after 3 years through 5 years	0
Other guarantees and commitments, Contractual amount, Expiring after 5 years	0
Other guarantees and commitments, Carrying value	0	0
Other guarantees and commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other guarantees and commitments, Contractual amount	12,491	15,074
Other guarantees and commitments, Contractual amount, Expiring in 1 year or less	10,939
Other guarantees and commitments, Contractual amount, Expiring after 1 year through 3 years	718
Other guarantees and commitments, Contractual amount, Expiring after 3 years through 5 years	93
Other guarantees and commitments, Contractual amount, Expiring after 5 years	741
Other guarantees and commitments, Carrying value	$ 27	$ 38
Days Past Due, 60 or More | Credit card
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Line of credit close criteria, period past due	60 days