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Loans, Lending Commitments and Related Allowance for Credit Losses - Loans by Type (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2023
HFI Loans
Total	$ 257,080	$ 226,900
ACL	(1,213)	(1,066)	$ (1,104)	$ (1,169)
Total loans, net	255,867	225,834
HFS Loans
Total loans	11,433	12,319
Total loans, net	11,433	12,319
Total Loans
Total loans	268,513	239,219
ACL	(1,213)	(1,066)	(1,104)	(1,169)
Total loans, net	267,300	238,153
Loans to non-U.S. borrowers, net
HFI Loans
Total loans, net	30,364	23,335
HFS Loans
Total loans, net	3,742	4,763
Total Loans
Total loans, net	34,106	28,098
Corporate
HFI Loans
Total	7,839	6,889
ACL	(239)	(200)	(227)	(241)
HFS Loans
Total loans	8,270	9,183
Total Loans
Total loans	16,109	16,072
ACL	(239)	(200)	(227)	(241)
Secured lending facilities
HFI Loans
Total	63,610	48,842
ACL	(200)	(140)	(130)	(153)
HFS Loans
Total loans	2,707	2,507
Total Loans
Total loans	66,317	51,349
ACL	(200)	(140)	(130)	(153)
Commercial real estate
HFI Loans
Total	7,853	8,412
ACL	(364)	(373)	(411)	(463)
HFS Loans
Total loans	421	628
Total Loans
Total loans	8,274	9,040
ACL	(364)	(373)	(411)	(463)
Residential real estate
HFI Loans
Total	70,910	66,738
ACL	(122)	(97)	(90)	(100)
HFS Loans
Total loans	5	0
Total Loans
Total loans	70,915	66,738
ACL	(122)	(97)	(90)	(100)
Securities-based lending and Other
HFI Loans
Total	106,868	96,019
ACL	(288)	(256)	(246)	(212)
HFS Loans
Total loans	30	1
Total Loans
Total loans	106,898	96,020
ACL	$ (288)	$ (256)	$ (246)	$ (212)

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