Revenue from Contract with Customer Revenue from Contract with Customer (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Less: Banking and deposit interest expense										$ 59	$ 136	$ 89
Total segment adjusted operating revenues										11,829	12,710	12,694
Total net revenues		$ 3,183	$ 3,003	$ 2,712	$ 3,001	$ 3,287	$ 3,317	$ 3,245	$ 3,118	11,899	12,967	12,835
Consolidation, Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues										1,384	1,410	1,431
Total before eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										9,696	9,604	9,336
Revenue from other sources	[1]									3,649	4,917	5,025
Total segment gross revenues										13,345	14,521	14,361
Less: Banking and deposit interest expense										62	144	95
Total segment adjusted operating revenues										13,283	14,377	14,266
Total before eliminations [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										6,727	6,371	6,120
Total before eliminations [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										1,822	1,783	1,874
Total before eliminations [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										442	495	453
Total before eliminations [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										3,511	3,156	2,865
Total before eliminations [Member] | Management and financial advice fees [Member] | Financial Planning Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										348	330	318
Total before eliminations [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										604	607	610
Total before eliminations [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										2,776	3,052	3,041
Total before eliminations [Member] | Distribution fees [Member] | Mutual Funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										974	963	989
Total before eliminations [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										1,372	1,409	1,430
Total before eliminations [Member] | Distribution fees [Member] | Other products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										430	680	622
Total before eliminations [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										193	181	175
Total Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										9,696	9,604	9,336
Revenue from other sources	[1]									3,572	4,652	4,867
Total segment gross revenues										13,268	14,256	14,203
Less: Banking and deposit interest expense										62	144	95
Total segment adjusted operating revenues										13,206	14,112	14,108
Total net revenues										11,829	12,710	12,694
Total Segment [Member] | Consolidation, Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues										1,377	1,402	1,414
Total Segment [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										6,727	6,371	6,120
Total Segment [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										1,822	1,783	1,874
Total Segment [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										442	495	453
Total Segment [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										3,511	3,156	2,865
Total Segment [Member] | Management and financial advice fees [Member] | Financial Planning Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										348	330	318
Total Segment [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										604	607	610
Total Segment [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										2,776	3,052	3,041
Total Segment [Member] | Distribution fees [Member] | Mutual Funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										974	963	989
Total Segment [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										1,372	1,409	1,430
Total Segment [Member] | Distribution fees [Member] | Other products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										430	680	622
Total Segment [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										193	181	175
Advice & Wealth Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										6,395	6,299	5,950
Revenue from other sources	[1]									339	436	328
Total segment gross revenues										6,734	6,735	6,278
Less: Banking and deposit interest expense										59	136	89
Total segment adjusted operating revenues										6,675	6,599	6,189
Total net revenues										5,782	5,675	5,237
Advice & Wealth Management [Member] | Consolidation, Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues										893	924	952
Advice & Wealth Management [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										4,211	3,841	3,538
Advice & Wealth Management [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										3,511	3,156	2,865
Advice & Wealth Management [Member] | Management and financial advice fees [Member] | Financial Planning Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										348	330	318
Advice & Wealth Management [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										352	355	355
Advice & Wealth Management [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										2,002	2,281	2,241
Advice & Wealth Management [Member] | Distribution fees [Member] | Mutual Funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										737	726	729
Advice & Wealth Management [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										835	875	890
Advice & Wealth Management [Member] | Distribution fees [Member] | Other products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										430	680	622
Advice & Wealth Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										182	177	171
Asset Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										2,867	2,879	2,953
Revenue from other sources	[1]									24	34	58
Total segment gross revenues										2,891	2,913	3,011
Total segment adjusted operating revenues										2,891	2,913	3,011
Total net revenues										2,838	2,858	2,961
Asset Management [Member] | Consolidation, Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues										53	55	50
Asset Management [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										2,454	2,467	2,517
Asset Management [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										1,822	1,783	1,874
Asset Management [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										442	495	453
Asset Management [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										190	189	190
Asset Management [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										411	408	433
Asset Management [Member] | Distribution fees [Member] | Mutual Funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										237	237	260
Asset Management [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										174	171	173
Asset Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										2	4	3
Protection [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										3
Corporate Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										3	6	7
Revenue from other sources	[1]									546	1,479	1,740
Total segment gross revenues										549	1,485	1,747
Less: Banking and deposit interest expense										3	8	6
Total segment adjusted operating revenues										546	1,477	1,741
Total net revenues										548	1,483	1,746
Corporate Segment [Member] | Consolidation, Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues										(2)	(6)	(5)
Corporate Segment [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers											6	7
Corporate Segment [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers											6	7
Non-Operating [Member]
Disaggregation of Revenue [Line Items]
Revenue from other sources	[1]									77	265	158
Total segment gross revenues										77	265	158
Total segment adjusted operating revenues										77	265	158
Total net revenues										70	257	141
Non-Operating [Member] | Consolidation, Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues										7	8	17
Retirement & Protection Solutions
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										431	420	426
Revenue from other sources	[1]									2,663	2,703	2,741
Total segment gross revenues										3,094	3,123	3,167
Total segment adjusted operating revenues										3,094	3,123	3,167
Total net revenues										2,661	2,694	2,750
Retirement & Protection Solutions | Consolidation, Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues										433	429	417
Retirement & Protection Solutions | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										62	63	65
Retirement & Protection Solutions | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										62	63	65
Retirement & Protection Solutions | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										363	357	360
Retirement & Protection Solutions | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										363	$ 357	360
Retirement & Protection Solutions | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										$ 6		$ 1

[1] Revenues not included in the scope of the revenue from contracts with customers standard. The amounts primarily consist of revenue associated with insurance and annuity products or financial instruments.