Revenue from Contracts with Customers - Disaggregated Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenue disaggregated by segment
Total revenues	$ 4,325	$ 3,845
Banking and deposit interest expense	(179)	(103)
Total net revenues	4,146	3,742
Management and financial advice fees
Revenue disaggregated by segment
Revenue from contracts with customers	2,399	2,137
Distribution fees
Revenue disaggregated by segment
Revenue from contracts with customers	506	517
Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	3,104	2,830
Revenue from other sources	1,531	1,291
Total revenues	4,635	4,121
Banking and deposit interest expense	(187)	(107)
Total net revenues	4,448	4,014
Reportable segments | Management and financial advice fees
Revenue disaggregated by segment
Revenue from contracts with customers	2,262	2,004
Reportable segments | Asset Management: Retail
Revenue disaggregated by segment
Revenue from contracts with customers	530	491
Reportable segments | Asset Management: Institutional
Revenue disaggregated by segment
Revenue from contracts with customers	159	152
Reportable segments | Advisory fees
Revenue disaggregated by segment
Revenue from contracts with customers	1,303	1,109
Reportable segments | Financial planning fees
Revenue disaggregated by segment
Revenue from contracts with customers	112	101
Reportable segments | Transaction and other fees
Revenue disaggregated by segment
Revenue from contracts with customers	158	151
Reportable segments | Distribution fees
Revenue disaggregated by segment
Revenue from contracts with customers	777	763
Reportable segments | Mutual funds
Revenue disaggregated by segment
Revenue from contracts with customers	252	227
Reportable segments | Insurance and annuity
Revenue disaggregated by segment
Revenue from contracts with customers	370	329
Reportable segments | Off-balance sheet brokerage cash
Revenue disaggregated by segment
Revenue from contracts with customers	50	126
Reportable segments | Other products
Revenue disaggregated by segment
Revenue from contracts with customers	105	81
Reportable segments | Other revenues
Revenue disaggregated by segment
Revenue from contracts with customers	65	63
Reportable segments | Advice & Wealth Management
Revenue disaggregated by segment
Revenue from contracts with customers	2,167	1,950
Revenue from other sources	572	418
Total revenues	2,739	2,368
Banking and deposit interest expense	(179)	(103)
Total net revenues	2,560	2,265
Reportable segments | Advice & Wealth Management | Management and financial advice fees
Revenue disaggregated by segment
Revenue from contracts with customers	1,509	1,299
Reportable segments | Advice & Wealth Management | Asset Management: Retail
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Advice & Wealth Management | Asset Management: Institutional
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Advice & Wealth Management | Advisory fees
Revenue disaggregated by segment
Revenue from contracts with customers	1,303	1,109
Reportable segments | Advice & Wealth Management | Financial planning fees
Revenue disaggregated by segment
Revenue from contracts with customers	112	101
Reportable segments | Advice & Wealth Management | Transaction and other fees
Revenue disaggregated by segment
Revenue from contracts with customers	94	89
Reportable segments | Advice & Wealth Management | Distribution fees
Revenue disaggregated by segment
Revenue from contracts with customers	598	593
Reportable segments | Advice & Wealth Management | Mutual funds
Revenue disaggregated by segment
Revenue from contracts with customers	196	175
Reportable segments | Advice & Wealth Management | Insurance and annuity
Revenue disaggregated by segment
Revenue from contracts with customers	247	211
Reportable segments | Advice & Wealth Management | Off-balance sheet brokerage cash
Revenue disaggregated by segment
Revenue from contracts with customers	50	126
Reportable segments | Advice & Wealth Management | Other products
Revenue disaggregated by segment
Revenue from contracts with customers	105	81
Reportable segments | Advice & Wealth Management | Other revenues
Revenue disaggregated by segment
Revenue from contracts with customers	60	58
Reportable segments | Asset Management
Revenue disaggregated by segment
Revenue from contracts with customers	839	786
Revenue from other sources	16	13
Total revenues	855	799
Banking and deposit interest expense	0	0
Total net revenues	855	799
Reportable segments | Asset Management | Management and financial advice fees
Revenue disaggregated by segment
Revenue from contracts with customers	739	691
Reportable segments | Asset Management | Asset Management: Retail
Revenue disaggregated by segment
Revenue from contracts with customers	530	491
Reportable segments | Asset Management | Asset Management: Institutional
Revenue disaggregated by segment
Revenue from contracts with customers	159	152
Reportable segments | Asset Management | Advisory fees
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Asset Management | Financial planning fees
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Asset Management | Transaction and other fees
Revenue disaggregated by segment
Revenue from contracts with customers	50	48
Reportable segments | Asset Management | Distribution fees
Revenue disaggregated by segment
Revenue from contracts with customers	95	90
Reportable segments | Asset Management | Mutual funds
Revenue disaggregated by segment
Revenue from contracts with customers	56	52
Reportable segments | Asset Management | Insurance and annuity
Revenue disaggregated by segment
Revenue from contracts with customers	39	38
Reportable segments | Asset Management | Off-balance sheet brokerage cash
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Asset Management | Other products
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Asset Management | Other revenues
Revenue disaggregated by segment
Revenue from contracts with customers	5	5
Reportable segments | Retirement & Protection Solutions
Revenue disaggregated by segment
Revenue from contracts with customers	98	94
Revenue from other sources	814	730
Total revenues	912	824
Banking and deposit interest expense	0	0
Total net revenues	912	824
Reportable segments | Retirement & Protection Solutions | Management and financial advice fees
Revenue disaggregated by segment
Revenue from contracts with customers	14	14
Reportable segments | Retirement & Protection Solutions | Asset Management: Retail
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Retirement & Protection Solutions | Asset Management: Institutional
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Retirement & Protection Solutions | Advisory fees
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Retirement & Protection Solutions | Financial planning fees
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Retirement & Protection Solutions | Transaction and other fees
Revenue disaggregated by segment
Revenue from contracts with customers	14	14
Reportable segments | Retirement & Protection Solutions | Distribution fees
Revenue disaggregated by segment
Revenue from contracts with customers	84	80
Reportable segments | Retirement & Protection Solutions | Mutual funds
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Retirement & Protection Solutions | Insurance and annuity
Revenue disaggregated by segment
Revenue from contracts with customers	84	80
Reportable segments | Retirement & Protection Solutions | Off-balance sheet brokerage cash
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Retirement & Protection Solutions | Other products
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Retirement & Protection Solutions | Other revenues
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Corporate & Other
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Revenue from other sources	129	130
Total revenues	129	130
Banking and deposit interest expense	(8)	(4)
Total net revenues	121	126
Reportable segments | Corporate & Other | Management and financial advice fees
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Corporate & Other | Asset Management: Retail
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Corporate & Other | Asset Management: Institutional
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Corporate & Other | Advisory fees
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Corporate & Other | Financial planning fees
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Corporate & Other | Transaction and other fees
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Corporate & Other | Distribution fees
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Corporate & Other | Mutual funds
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Corporate & Other | Insurance and annuity
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Corporate & Other | Off-balance sheet brokerage cash
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Corporate & Other | Other products
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Reportable segments | Corporate & Other | Other revenues
Revenue disaggregated by segment
Revenue from contracts with customers	0	0
Non-operating
Revenue disaggregated by segment
Revenue from other sources	49	47
Total revenues	49	47
Total net revenues	49	47
Operating segments and non-operating
Revenue disaggregated by segment
Revenue from other sources	1,580	1,338
Total revenues	4,684	4,168
Total net revenues	4,497	4,061
Intersegment eliminations
Revenue disaggregated by segment
Total net revenues	(348)	(316)
Intersegment eliminations | Advice & Wealth Management
Revenue disaggregated by segment
Total net revenues	(225)	(201)
Intersegment eliminations | Asset Management
Revenue disaggregated by segment
Total net revenues	(24)	(17)
Intersegment eliminations | Retirement & Protection Solutions
Revenue disaggregated by segment
Total net revenues	(106)	(102)
Intersegment eliminations | Corporate & Other
Revenue disaggregated by segment
Total net revenues	7	4
Segment reconciling items
Revenue disaggregated by segment
Total net revenues	(3)	(3)
Eliminations and reconciling items
Revenue disaggregated by segment
Total net revenues	(351)	(319)
Operating segments excluding intersegment elimination
Revenue disaggregated by segment
Total net revenues	4,100	3,698
Operating segments excluding intersegment elimination | Advice & Wealth Management
Revenue disaggregated by segment
Total net revenues	2,335	2,064
Operating segments excluding intersegment elimination | Asset Management
Revenue disaggregated by segment
Total net revenues	831	782
Operating segments excluding intersegment elimination | Retirement & Protection Solutions
Revenue disaggregated by segment
Total net revenues	806	722
Operating segments excluding intersegment elimination | Corporate & Other
Revenue disaggregated by segment
Total net revenues	128	130
Corporate and reconciling items
Revenue disaggregated by segment
Total net revenues	$ 46	$ 44