Revenue from Contract with Customer (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2021		Jun. 30, 2020		Jun. 30, 2021		Jun. 30, 2020
Revenue disaggregated by segment
Total revenues	$ 3,420		$ 2,730		$ 6,775		$ 5,756
Less: Banking and deposit interest expense	(2)		(18)		(7)		(43)
Total net revenues	3,418		2,712		6,768		5,713
Intersegment eliminations
Revenue disaggregated by segment
Total net revenues	(399)	[1]	(326)	[1]	(778)	[2]	(664)	[2]
Eliminations
Revenue disaggregated by segment
Total net revenues	(402)		(328)		(784)		(668)
Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	2,911		2,250		5,660		4,656
Revenue from other sources	878		860		1,767		1,769
Total revenues	3,789		3,110		7,427		6,425
Less: Banking and deposit interest expense	(3)		(19)		(8)		(45)
Total net revenues	3,786		3,091		7,419		6,380
Nonsegment
Revenue disaggregated by segment
Revenue from other sources	34		(51)		133		1
Total revenues	34		(51)		133		1
Total net revenues	34		(51)		133		1
Segment reconciling items
Revenue disaggregated by segment
Total net revenues	31		(53)		127		(3)
Total
Revenue disaggregated by segment
Revenue from other sources	912		809		1,900		1,770
Total revenues	3,823		3,059		7,560		6,426
Less: Banking and deposit interest expense	(3)		(19)		(8)		(45)
Total net revenues	3,820		3,040		7,552		6,381
Total Segments after intersegment eliminations | Reportable segments
Revenue disaggregated by segment
Total net revenues	3,387		2,765		6,641		5,716
CIEs | Eliminations
Revenue disaggregated by segment
Total net revenues	(3)		(2)		(6)		(4)
Management and financial advice fees
Revenue disaggregated by segment
Revenue from contracts with customers	2,251		1,702		4,353		3,472
Management and financial advice fees | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	2,071		1,548		3,998		3,166
Asset Management: Retail | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	567		417		1,098		864
Asset Management: Institutional | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	131		101		254		186
Advisory fees | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	1,113		797		2,141		1,651
Financial planning fees | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	93		86		181		167
Transaction and other fees | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	167		147		324		298
Distribution fees
Revenue disaggregated by segment
Revenue from contracts with customers	452		375		910		839
Distribution fees | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	781		654		1,553		1,391
Mutual funds | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	281		225		555		469
Insurance and annuity | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	402		342		788		679
Other products | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	98		87		210		243
Other revenues | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	59		48		109		99
Advice and Wealth Management Segment
Revenue disaggregated by segment
Total net revenues	1,714		1,329		3,343		2,802
Advice and Wealth Management Segment | Intersegment eliminations
Revenue disaggregated by segment
Total net revenues	(266)		(208)		(516)		(430)
Advice and Wealth Management Segment | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	1,912		1,469		3,725		3,088
Revenue from other sources	70		86		141		187
Total revenues	1,982		1,555		3,866		3,275
Less: Banking and deposit interest expense	(2)		(18)		(7)		(43)
Total net revenues	1,980		1,537		3,859		3,232
Advice and Wealth Management Segment | Management and financial advice fees | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	1,299		969		2,504		1,993
Advice and Wealth Management Segment | Advisory fees | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	1,113		797		2,141		1,651
Advice and Wealth Management Segment | Financial planning fees | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	93		86		181		167
Advice and Wealth Management Segment | Transaction and other fees | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	93		86		182		175
Advice and Wealth Management Segment | Distribution fees | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	562		453		1,121		1,001
Advice and Wealth Management Segment | Mutual funds | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	212		170		419		354
Advice and Wealth Management Segment | Insurance and annuity | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	252		196		492		404
Advice and Wealth Management Segment | Other products | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	98		87		210		243
Advice and Wealth Management Segment | Other revenues | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	51		47		100		94
Asset Management Segment
Revenue disaggregated by segment
Total net revenues	865		655		1,680		1,328
Asset Management Segment | Intersegment eliminations
Revenue disaggregated by segment
Total net revenues	(14)		(13)		(27)		(26)
Asset Management Segment | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	879		660		1,700		1,343
Revenue from other sources			8		7		11
Total revenues	879		668		1,707		1,354
Total net revenues	879		668		1,707		1,354
Asset Management Segment | Management and financial advice fees | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	754		563		1,460		1,142
Asset Management Segment | Asset Management: Retail | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	567		417		1,098		864
Asset Management Segment | Asset Management: Institutional | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	131		101		254		186
Asset Management Segment | Transaction and other fees | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	56		45		108		92
Asset Management Segment | Distribution fees | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	118		96		232		199
Asset Management Segment | Mutual funds | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	69		55		136		115
Asset Management Segment | Insurance and annuity | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	49		41		96		84
Asset Management Segment | Other revenues | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	7		1		8		2
Retirement & Protection Solutions Segment
Revenue disaggregated by segment
Total net revenues	690		650		1,361		1,305
Retirement & Protection Solutions Segment | Intersegment eliminations
Revenue disaggregated by segment
Total net revenues	(118)		(105)		(234)		(209)
Retirement & Protection Solutions Segment | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	119		121		234		222
Revenue from other sources	689		634		1,361		1,292
Total revenues	808		755		1,595		1,514
Total net revenues	808		755		1,595		1,514
Retirement & Protection Solutions Segment | Management and financial advice fees | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	18		16		34		31
Retirement & Protection Solutions Segment | Transaction and other fees | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	18		16		34		31
Retirement & Protection Solutions Segment | Distribution fees | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	101		105		200		191
Retirement & Protection Solutions Segment | Insurance and annuity | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	101		105		200		191
Corporate and Other Segment
Revenue disaggregated by segment
Total net revenues	118		131		257		281
Corporate and Other Segment | Intersegment eliminations
Revenue disaggregated by segment
Total net revenues	(1)				(1)		1
Corporate and Other Segment | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	1				1		3
Revenue from other sources	119		132		258		279
Total revenues	120		132		259		282
Less: Banking and deposit interest expense	(1)		(1)		(1)		(2)
Total net revenues	119		$ 131		258		280
Corporate and Other Segment | Other revenues | Reportable segments
Revenue disaggregated by segment
Revenue from contracts with customers	$ 1				$ 1		$ 3

[1] Represents the elimination of intersegment revenues recognized for the three months ended June 30, 2021 and 2020 in each segment as follows: Advice & Wealth Management ($266 million and $208 million, respectively); Asset Management ($14 million and $13 million, respectively); Retirement & Protection Solutions ($118 million and $105 million, respectively); and Corporate & Other ($1 million and nil, respectively).

[2] Represents the elimination of intersegment revenues recognized for the six months ended June 30, 2021 and 2020 in each segment as follows: Advice & Wealth Management ($516 million and $430 million, respectively); Asset Management ($27 million and $26 million, respectively); Retirement & Protection Solutions ($234 million and $209 million, respectively); and Corporate & Other ($1 million and $(1) million, respectively).