Revenue from Contract with Customer (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Less: Banking and deposit interest expense		$ 37	$ 20	$ 72	$ 36
Total segment net revenues		3,247	3,147	6,365	6,258
Total net revenues		3,245	3,196	6,363	6,364
Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		350	368	686	729
Total before eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2,393	2,338	4,660	4,646
Revenue from other sources	[1]	1,241	1,247	2,465	2,485
Total segment gross revenues		3,634	3,585	7,125	7,131
Less: Banking and deposit interest expense		39	21	76	38
Total segment net revenues		3,595	3,564	7,049	7,093
Total before eliminations [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,570	1,524	3,042	3,027
Total before eliminations [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		442	472	871	952
Total before eliminations [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		111	109	215	220
Total before eliminations [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		779	706	1,504	1,397
Total before eliminations [Member] | Management and financial advice fees [Member] | Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		84	80	153	148
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		154	157	299	310
Total before eliminations [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		773	766	1,520	1,529
Total before eliminations [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		242	252	470	511
Total before eliminations [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		351	367	685	726
Total before eliminations [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		180	147	365	292
Total before eliminations [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		50	48	98	90
Total Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2,393	2,338	4,660	4,646
Revenue from other sources	[1]	1,242	1,192	2,463	2,369
Total segment gross revenues		3,635	3,530	7,123	7,015
Less: Banking and deposit interest expense		39	21	76	38
Total segment net revenues		3,596	3,509	7,047	6,977
Total net revenues		3,247	3,147	6,365	6,258
Total Segment [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		349	362	682	719
Total Segment [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,570	1,524	3,042	3,027
Total Segment [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		442	472	871	952
Total Segment [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		111	109	215	220
Total Segment [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		779	706	1,504	1,397
Total Segment [Member] | Management and financial advice fees [Member] | Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		84	80	153	148
Total Segment [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		154	157	299	310
Total Segment [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		773	766	1,520	1,529
Total Segment [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		242	252	470	511
Total Segment [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		351	367	685	726
Total Segment [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		180	147	365	292
Total Segment [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		50	48	98	90
Advice and Wealth Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,583	1,487	3,067	2,933
Revenue from other sources	[1]	106	76	211	147
Total segment gross revenues		1,689	1,563	3,278	3,080
Less: Banking and deposit interest expense		36	20	71	36
Total segment net revenues		1,653	1,543	3,207	3,044
Total net revenues		1,423	1,296	2,758	2,557
Advice and Wealth Management [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		230	247	449	487
Advice and Wealth Management [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		954	878	1,832	1,726
Advice and Wealth Management [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		779	706	1,504	1,397
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		84	80	153	148
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	92	175	181
Advice and Wealth Management [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		580	562	1,141	1,119
Advice and Wealth Management [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		182	184	353	374
Advice and Wealth Management [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		218	231	423	453
Advice and Wealth Management [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		180	147	365	292
Advice and Wealth Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		49	47	94	88
Asset Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		706	740	1,384	1,494
Revenue from other sources	[1]	7	15	18	39
Total segment gross revenues		713	755	1,402	1,533
Less: Banking and deposit interest expense		1		1
Total segment net revenues		712	755	1,401	1,533
Total net revenues		698	743	1,374	1,509
Asset Management [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		14	12	27	24
Asset Management [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		600	629	1,179	1,268
Asset Management [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		442	472	871	952
Asset Management [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		111	109	215	220
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	93	96
Asset Management [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		103	110	201	224
Asset Management [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		60	68	117	137
Asset Management [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		43	42	84	87
Asset Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		3	1	4	2
Annuities [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		93	99	187	197
Revenue from other sources	[1]	527	523	1,037	1,038
Total segment gross revenues		620	622	1,224	1,235
Total segment net revenues		620	622	1,224	1,235
Total net revenues		529	532	1,045	1,055
Annuities [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		91	90	179	180
Annuities [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		14	15	27	29
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	27	29
Annuities [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		81	84	160	168
Annuities [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		81	84	160	168
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		9	9	18	17
Revenue from other sources	[1]	250	246	503	491
Total segment gross revenues		259	255	521	508
Total segment net revenues		259	255	521	508
Total net revenues		244	242	491	479
Protection [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		15	13	30	29
Protection [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2	2	4	3
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	3
Protection [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		7	7	14	14
Protection [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		7	7	14	14
Corporate Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2	3	4	5
Revenue from other sources	[1]	352	332	694	654
Total segment gross revenues		354	335	698	659
Less: Banking and deposit interest expense		2	1	4	2
Total segment net revenues		352	334	694	657
Total net revenues		353	334	697	658
Corporate Segment [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		(1)		(3)	(1)
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		2	3	4	4
Corporate Segment [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2	3	4	4
Non-operating Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from other sources	[1]	(1)	55	2	116
Total segment gross revenues		(1)	55	2	116
Total segment net revenues		(1)	55	2	116
Total net revenues		(2)	49	(2)	106
Non-operating Revenue [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		$ 1	$ 6	$ 4	$ 10

[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.