Revenue from Contract with Customer (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Less: Banking and deposit interest expense		$ 34	$ 24	$ 106	$ 60
Total segment net revenues		3,300	3,268	9,665	9,526
Total net revenues		3,317	3,292	9,680	9,656
Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		364	356	1,050	1,085
Total before eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2,443	2,374	7,103	7,020
Revenue from other sources	[1]	1,273	1,300	3,738	3,785
Total segment gross revenues		3,716	3,674	10,841	10,805
Less: Banking and deposit interest expense		35	26	111	64
Total segment net revenues		3,681	3,648	10,730	10,741
Total before eliminations [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,631	1,571	4,673	4,598
Total before eliminations [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		448	479	1,319	1,431
Total before eliminations [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		135	125	350	345
Total before eliminations [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		813	740	2,317	2,137
Total before eliminations [Member] | Management and financial advice fees [Member] | Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		80	75	233	223
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		155	152	454	462
Total before eliminations [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		772	760	2,292	2,289
Total before eliminations [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		242	246	712	757
Total before eliminations [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		361	358	1,046	1,084
Total before eliminations [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		169	156	534	448
Total before eliminations [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		40	43	138	133
Total Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2,443	2,374	7,103	7,020
Revenue from other sources	[1]	1,254	1,274	3,717	3,643
Total segment gross revenues		3,697	3,648	10,820	10,663
Less: Banking and deposit interest expense		35	26	111	64
Total segment net revenues		3,662	3,622	10,709	10,599
Total net revenues		3,300	3,268	9,665	9,526
Total Segment [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		362	354	1,044	1,073
Total Segment [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,631	1,571	4,673	4,598
Total Segment [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		448	479	1,319	1,431
Total Segment [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		135	125	350	345
Total Segment [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		813	740	2,317	2,137
Total Segment [Member] | Management and financial advice fees [Member] | Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		80	75	233	223
Total Segment [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		155	152	454	462
Total Segment [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		772	760	2,292	2,289
Total Segment [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		242	246	712	757
Total Segment [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		361	358	1,046	1,084
Total Segment [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		169	156	534	448
Total Segment [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		40	43	138	133
Advice and Wealth Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,602	1,503	4,669	4,436
Revenue from other sources	[1]	115	85	326	232
Total segment gross revenues		1,717	1,588	4,995	4,668
Less: Banking and deposit interest expense		35	24	106	60
Total segment net revenues		1,682	1,564	4,889	4,608
Total net revenues		1,442	1,329	4,200	3,886
Advice and Wealth Management [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		240	235	689	722
Advice and Wealth Management [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		984	902	2,816	2,628
Advice and Wealth Management [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		813	740	2,317	2,137
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		80	75	233	223
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		91	87	266	268
Advice and Wealth Management [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		578	558	1,719	1,677
Advice and Wealth Management [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		183	182	536	556
Advice and Wealth Management [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		226	220	649	673
Advice and Wealth Management [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		169	156	534	448
Advice and Wealth Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		40	43	134	131
Asset Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		733	760	2,117	2,254
Revenue from other sources	[1]	8	12	26	51
Total segment gross revenues		741	772	2,143	2,305
Less: Banking and deposit interest expense		(1)
Total segment net revenues		742	772	2,143	2,305
Total net revenues		729	759	2,103	2,268
Asset Management [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		13	13	40	37
Asset Management [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		631	652	1,810	1,920
Asset Management [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		448	479	1,319	1,431
Asset Management [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		135	125	350	345
Asset Management [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		48	48	141	144
Asset Management [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		102	108	303	332
Asset Management [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		59	64	176	201
Asset Management [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		43	44	127	131
Asset Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers				4	2
Annuities [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		98	100	285	297
Revenue from other sources	[1]	519	528	1,556	1,566
Total segment gross revenues		617	628	1,841	1,863
Total segment net revenues		617	628	1,841	1,863
Total net revenues		523	537	1,568	1,592
Annuities [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		94	91	273	271
Annuities [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		14	15	41	44
Annuities [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		14	15	41	44
Annuities [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		84	85	244	253
Annuities [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		84	85	244	253
Protection [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		9	10	27	27
Revenue from other sources	[1]	256	318	759	809
Total segment gross revenues		265	328	786	836
Total segment net revenues		265	328	786	836
Total net revenues		249	311	740	790
Protection [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		16	17	46	46
Protection [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2	2	6	5
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	6	5
Protection [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		7	8	21	22
Protection [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		7	8	21	22
Corporate Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1	1	5	6
Revenue from other sources	[1]	356	331	1,050	985
Total segment gross revenues		357	332	1,055	991
Less: Banking and deposit interest expense		1	2	5	4
Total segment net revenues		356	330	1,050	987
Total net revenues		357	332	1,054	990
Corporate Segment [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		(1)	(2)	(4)	(3)
Corporate Segment [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers					1
Corporate Segment [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers					1
Corporate Segment [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1	1	5	5
Corporate Segment [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1	1	5	5
Non-operating Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from other sources	[1]	19	26	21	142
Total segment gross revenues		19	26	21	142
Total segment net revenues		19	26	21	142
Total net revenues		17	24	15	130
Non-operating Revenue [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		$ 2	$ 2	$ 6	$ 12

[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.