Revenue Recognition (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Cash and cash equivalents		$ 1,894	$ 812	$ 40
Cash and investments segregated		1,355	691	24
Receivables from brokerage clients		4,793	3,321	2,455
Available for sale securities		2,987	4,139	4,641
Held to maturity securities		2,872	1,688	0
Bank loans		1,664	1,083	620
Securities lending revenue		419	471	720
Other interest revenue		127	22	6
Interest revenue		16,111	12,227	8,506
Bank deposits		(3,363)	(723)	(54)
Payables to brokerage clients		(271)	(123)	(9)
Other short-term borrowings		(375)	(48)	(9)
Federal Home Loan Bank borrowings		(1,810)	(106)	0
Long-term debt		(715)	(498)	(384)
Securities lending expense		(147)	(48)	(24)
Other interest expense		(3)	1	4
Interest expense		(6,684)	(1,545)	(476)
Net interest revenue		9,427	10,682	8,030
Total net revenues		18,837	20,762	18,520
Asset management and administration fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	[1]	4,756	4,216	4,274
Mutual funds, ETFs, and CTFs
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		2,563	2,055	1,961
Advice solutions
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		1,868	1,854	1,993
Other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		325	307	320
Trading revenue
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		3,230	3,673	4,152
Commissions
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		1,601	1,787	2,050
Order flow revenue
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		1,404	1,738	2,053
Principal transactions
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		225	148	49
Bank deposit account fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		705	1,409	1,315
Other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		$ 719	$ 782	$ 749

[1] No fee waivers were recognized for the year ended December 31, 2023. Includes fee waivers of $57 million and $326 million for the years ended December 31, 2022 and 2021, respectively.