Revenue from Contract with Customer (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Less: Banking and deposit interest expense		$ 10	$ 34	$ 53	$ 106
Total segment adjusted operating revenues		2,977	3,300	8,693	9,665
Total net revenues		3,003	3,317	8,716	9,680
Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues		343	364	1,011	1,050
Total before eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2,433	2,443	7,089	7,103
Revenue from other sources	[1]	923	1,273	2,693	3,738
Total segment gross revenues		3,356	3,716	9,782	10,841
Less: Banking and deposit interest expense		10	35	55	111
Total segment adjusted operating revenues		3,346	3,681	9,727	10,730
Total before eliminations [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,726	1,631	4,892	4,673
Total before eliminations [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		466	448	1,330	1,319
Total before eliminations [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		122	135	308	350
Total before eliminations [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		907	813	2,558	2,317
Total before eliminations [Member] | Management and financial advice fees [Member] | Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		81	80	248	233
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		150	155	448	454
Total before eliminations [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		658	772	2,049	2,292
Total before eliminations [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		245	242	714	712
Total before eliminations [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		322	361	1,001	1,046
Total before eliminations [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		91	169	334	534
Total before eliminations [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		49	40	148	138
Total Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2,433	2,443	7,089	7,103
Revenue from other sources	[1]	896	1,254	2,665	3,717
Total segment gross revenues		3,329	3,697	9,754	10,820
Less: Banking and deposit interest expense		10	35	55	111
Total segment adjusted operating revenues		3,319	3,662	9,699	10,709
Total net revenues		2,977	3,300	8,693	9,665
Total Segment [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues		342	362	1,006	1,044
Total Segment [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,726	1,631	4,892	4,673
Total Segment [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		466	448	1,330	1,319
Total Segment [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		122	135	308	350
Total Segment [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		907	813	2,558	2,317
Total Segment [Member] | Management and financial advice fees [Member] | Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		81	80	248	233
Total Segment [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		150	155	448	454
Total Segment [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		658	772	2,049	2,292
Total Segment [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		245	242	714	712
Total Segment [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		322	361	1,001	1,046
Total Segment [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		91	169	334	534
Total Segment [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		49	40	148	138
Advice and Wealth Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,600	1,602	4,688	4,669
Revenue from other sources	[1]	77	115	264	326
Total segment gross revenues		1,677	1,717	4,952	4,995
Less: Banking and deposit interest expense		10	35	53	106
Total segment adjusted operating revenues		1,667	1,682	4,899	4,889
Total net revenues		1,448	1,442	4,250	4,200
Advice and Wealth Management [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues		219	240	649	689
Advice and Wealth Management [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,077	984	3,070	2,816
Advice and Wealth Management [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		907	813	2,558	2,317
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		81	80	248	233
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		89	91	264	266
Advice and Wealth Management [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		479	578	1,480	1,719
Advice and Wealth Management [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		186	183	540	536
Advice and Wealth Management [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		202	226	606	649
Advice and Wealth Management [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		91	169	334	534
Advice and Wealth Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		44	40	138	134
Asset Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		739	733	2,082	2,117
Revenue from other sources	[1]		8	11	26
Total segment gross revenues		739	741	2,093	2,143
Less: Banking and deposit interest expense			(1)
Total segment adjusted operating revenues		739	742	2,093	2,143
Total net revenues		726	729	2,054	2,103
Asset Management [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues		13	13	39	40
Asset Management [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		635	631	1,777	1,810
Asset Management [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		466	448	1,330	1,319
Asset Management [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		122	135	308	350
Asset Management [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		47	48	139	141
Asset Management [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		104	102	303	303
Asset Management [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		59	59	174	176
Asset Management [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		45	43	129	127
Asset Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers				2	4
Retirement & Protection Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		94	107	316	312
Revenue from other sources	[1]	687	681	1,979	2,025
Total segment gross revenues		781	788	2,295	2,337
Total segment adjusted operating revenues		781	788	2,295	2,337
Total net revenues		671	678	1,976	2,018
Retirement & Protection Solutions [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues		110	110	319	319
Retirement & Protection Solutions [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		14	16	45	47
Retirement & Protection Solutions [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		14	16	45	47
Retirement & Protection Solutions [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		75	91	266	265
Retirement & Protection Solutions [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		75	91	266	265
Retirement & Protection Solutions [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		5		5
Corporate Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			1	3	5
Revenue from other sources	[1]	132	450	411	1,340
Total segment gross revenues		132	451	414	1,345
Less: Banking and deposit interest expense			1	2	5
Total segment adjusted operating revenues		132	450	412	1,340
Total net revenues		132	451	413	1,344
Corporate Segment [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues			(1)	(1)	(4)
Corporate Segment [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			1		5
Corporate Segment [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			1		5
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]	27	19	28	21
Total segment gross revenues		27	19	28	21
Total segment adjusted operating revenues		27	19	28	21
Total net revenues		26	17	23	15
Non-operating Revenue [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment adjusted operating revenues		$ 1	$ 2	$ 5	$ 6

[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.