Revenue from Contract with Customer (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Less: Banking and deposit interest expense		$ 18	$ 37	$ 43	$ 72
Total segment adjusted operating revenues		2,765	3,247	5,716	6,365
Total net revenues		2,712	3,245	5,713	6,363
Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues		328	350	668	686
Total before eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2,250	2,393	4,656	4,660
Revenue from other sources	[1]	809	1,241	1,770	2,465
Total segment gross revenues		3,059	3,634	6,426	7,125
Less: Banking and deposit interest expense		19	39	45	76
Total segment adjusted operating revenues		3,040	3,595	6,381	7,049
Total before eliminations [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,548	1,570	3,166	3,042
Total before eliminations [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		417	442	864	871
Total before eliminations [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		101	111	186	215
Total before eliminations [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		797	779	1,651	1,504
Total before eliminations [Member] | Management and financial advice fees [Member] | Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		86	84	167	153
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		147	154	298	299
Total before eliminations [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		654	773	1,391	1,520
Total before eliminations [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		225	242	469	470
Total before eliminations [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		342	351	679	685
Total before eliminations [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		87	180	243	365
Total before eliminations [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		48	50	99	98
Total Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2,250	2,393	4,656	4,660
Revenue from other sources	[1]	860	1,242	1,769	2,463
Total segment gross revenues		3,110	3,635	6,425	7,123
Less: Banking and deposit interest expense		19	39	45	76
Total segment adjusted operating revenues		3,091	3,596	6,380	7,047
Total net revenues		2,765	3,247	5,716	6,365
Total Segment [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues		326	349	664	682
Total Segment [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,548	1,570	3,166	3,042
Total Segment [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		417	442	864	871
Total Segment [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		101	111	186	215
Total Segment [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		797	779	1,651	1,504
Total Segment [Member] | Management and financial advice fees [Member] | Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		86	84	167	153
Total Segment [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		147	154	298	299
Total Segment [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		654	773	1,391	1,520
Total Segment [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		225	242	469	470
Total Segment [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		342	351	679	685
Total Segment [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		87	180	243	365
Total Segment [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		48	50	99	98
Advice and Wealth Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,469	1,583	3,088	3,067
Revenue from other sources	[1]	86	106	187	211
Total segment gross revenues		1,555	1,689	3,275	3,278
Less: Banking and deposit interest expense		18	36	43	71
Total segment adjusted operating revenues		1,537	1,653	3,232	3,207
Total net revenues		1,329	1,423	2,802	2,758
Advice and Wealth Management [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues		208	230	430	449
Advice and Wealth Management [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		969	954	1,993	1,832
Advice and Wealth Management [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		797	779	1,651	1,504
Advice and Wealth Management [Member] | Management and financial advice fees [Member] | Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		86	84	167	153
Advice and Wealth Management [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		86	91	175	175
Advice and Wealth Management [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		453	580	1,001	1,141
Advice and Wealth Management [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		170	182	354	353
Advice and Wealth Management [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		196	218	404	423
Advice and Wealth Management [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		87	180	243	365
Advice and Wealth Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		47	49	94	94
Asset Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		660	706	1,343	1,384
Revenue from other sources	[1]	8	7	11	18
Total segment gross revenues		668	713	1,354	1,402
Less: Banking and deposit interest expense			1		1
Total segment adjusted operating revenues		668	712	1,354	1,401
Total net revenues		655	698	1,328	1,374
Asset Management [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues		13	14	26	27
Asset Management [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		563	600	1,142	1,179
Asset Management [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		417	442	864	871
Asset Management [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		101	111	186	215
Asset Management [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		45	47	92	93
Asset Management [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		96	103	199	201
Asset Management [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		55	60	115	117
Asset Management [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		41	43	84	84
Asset Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1	3	2	4
Annuities [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		96	93	188	187
Revenue from other sources	[1]	487	527	984	1,037
Total segment gross revenues		583	620	1,172	1,224
Total segment adjusted operating revenues		583	620	1,172	1,224
Total net revenues		493	529	992	1,045
Annuities [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues		90	91	180	179
Annuities [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		14	14	27	27
Annuities [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		14	14	27	27
Annuities [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		82	81	161	160
Annuities [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		82	81	161	160
Annuities [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			(2)
Protection [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		25	9	34	18
Revenue from other sources	[1]	232	250	480	503
Total segment gross revenues		257	259	514	521
Total segment adjusted operating revenues		257	259	514	521
Total net revenues		242	244	485	491
Protection [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues		15	15	29	30
Protection [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2	2	4	4
Protection [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2	2	4	4
Protection [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		23	7	30	14
Protection [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		23	7	30	14
Corporate Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			2	3	4
Revenue from other sources	[1]	47	352	107	694
Total segment gross revenues		47	354	110	698
Less: Banking and deposit interest expense		1	2	2	4
Total segment adjusted operating revenues		46	352	108	694
Total net revenues		46	353	109	697
Corporate Segment [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues			(1)	(1)	(3)
Corporate Segment [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			2		4
Corporate Segment [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			2		4
Corporate Segment [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers				3
Non-operating Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from other sources	[1]	(51)	(1)	1	2
Total segment gross revenues		(51)	(1)	1	2
Total segment adjusted operating revenues		(51)	(1)	1	2
Total net revenues		(53)	(2)	(3)	(2)
Non-operating Revenue [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues		$ 2	$ 1	$ 4	$ 4

[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.