Loans, Lending Commitments and Related Allowance for Credit Losses - Loans by Type (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
HFI Loans
Total loans	$ 214,139	$ 204,554
ACL	(1,175)	(1,169)	$ (1,081)	$ (839)
Total loans, net	212,964	203,385
HFS Loans
Total loans	15,283	15,255
Total loans, net	15,283	15,255
Total Loans
Total loans	229,422	219,809
ACL	(1,175)	(1,169)	(1,081)	(839)
Total loans, net	228,247	218,640
Loans to non-U.S. borrowers, net
HFI Loans
Total loans, net	23,523	21,152
HFS Loans
Total loans, net	5,183	5,043
Total Loans
Total loans, net	28,706	26,195
Corporate
HFI Loans
Total loans	6,764	6,758
ACL	(241)	(241)	(257)	(235)
HFS Loans
Total loans	11,134	11,862
Total Loans
Total loans	17,898	18,620
ACL	(241)	(241)	(257)	(235)
Secured lending facilities
HFI Loans
Total loans	44,869	39,498
ACL	(143)	(153)	(156)	(153)
HFS Loans
Total loans	3,569	3,161
Total Loans
Total loans	48,438	42,659
ACL	(143)	(153)	(156)	(153)
Commercial real estate
HFI Loans
Total loans	8,804	8,678
ACL	(469)	(463)	(385)	(275)
HFS Loans
Total loans	573	209
Total Loans
Total loans	9,377	8,887
ACL	(469)	(463)	(385)	(275)
Residential real estate
HFI Loans
Total loans	63,161	60,375
ACL	(94)	(100)	(112)	(87)
HFS Loans
Total loans	1	22
Total Loans
Total loans	63,162	60,397
ACL	(94)	(100)	(112)	(87)
Securities-based lending and Other
HFI Loans
Total loans	90,541	89,245
ACL	(228)	(212)	(171)	(89)
HFS Loans
Total loans	6	1
Total Loans
Total loans	90,547	89,246
ACL	$ (228)	$ (212)	$ (171)	$ (89)

Financing Receivable including Held-for-Sale, after Allowance for Credit Loss

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Financing Receivable including Held-for-Sale, before Allowance for Credit Loss

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Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
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Amount, before valuation allowance, of financing receivable classified as held-for-sale.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

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-Topic 948
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Amount, after valuation allowance, of financing receivable held for sale and not part of disposal group. Excludes loan covered under loss sharing agreement and loan classified as investment in debt security.

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