Fair Value Hierarchy - Fair Value Option, Additional Information (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) yr	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) yr	Sep. 30, 2022 USD ($)	Dec. 31, 2022 yr
Other Financial Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net realized and unrealized gains/(losses) on liabilities	$ 1,120	$ 1,450	$ 202	$ 5,760
Net realized gains/(losses)	(88)	(90)	(223)	(222)
Net unrealized gains/(losses)	1,210	1,538	425	5,977
Net realized gains/(losses) included in earnings	(88)	(90)	(223)	(222)
Other Financial Liabilities | Debt valuation adjustment
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net realized gains/(losses) included in comprehensive income	(44)	262	(205)	924
Other Financial Liabilities | Market making
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net realized gains/(losses) included in earnings	1,150	1,130	415	4,690
Other Financial Liabilities | Other principal transactions
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net realized gains/(losses) included in earnings	16	69	4	155
Other Financial Liabilities | Interest expense
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net realized gains/(losses) included in earnings	(4)	(7)	(12)	(14)
Other secured financings | Other Financial Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net unrealized gains/(losses)	41	86	13	177
Net realized gains/(losses) included in earnings	$ (3)	$ (13)	$ (3)	$ (18)
Minimum | Level 3 | Other secured financings | Yield
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other secured financing measurement input	0.068		0.068		0.045
Minimum | Level 3 | Other secured financings | Duration (years)
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other secured financing measurement input | yr	0.4		0.4		0.6
Maximum | Level 3 | Other secured financings | Yield
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other secured financing measurement input	0.133		0.133		0.094
Maximum | Level 3 | Other secured financings | Duration (years)
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other secured financing measurement input | yr	5.8		5.8		5.1
Weighted Average | Level 3 | Other secured financings | Yield
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other secured financing measurement input	0.090		0.090		0.059
Weighted Average | Level 3 | Other secured financings | Duration (years)
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other secured financing measurement input | yr	1.4		1.4		2.2