Revenue from Contracts with Customers Revenue from Contract with Customer (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		$ 2,338	$ 2,163	$ 4,646	$ 4,254
Revenue from other sources	[1]	1,247	1,211	2,485	2,407
Total segment gross revenues		3,585	3,374	7,131	6,661
Less: Banking and deposit interest expense		21	13	38	23
Total segment net revenues before eliminations		3,564	3,361	7,093	6,638
Total net revenues		3,196	3,012	6,364	5,938
Intersegment revenues, eliminations [Member]
Disaggregation of Revenue [Line Items]
Eliminations		368	349	729	700
Total management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,524	1,409	3,027	2,739
Asset management fees - Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		472	460	952	900
Asset management fees - Institutional [Member] [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		109	106	220	207
Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		706	606	1,397	1,176
Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		80	75	148	139
Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		157	162	310	317
Total Distribution Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		766	708	1,529	1,431
Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		252	249	511	537
Insurance and annuity [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		367	340	726	666
Other products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		147	119	292	228
Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		48	46	90	84
Total Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2,338	2,163	4,646	4,254
Revenue from other sources	[1]	1,192	1,172	2,369	2,323
Total segment gross revenues		3,530	3,335	7,015	6,577
Less: Banking and deposit interest expense		21	13	38	23
Total segment net revenues before eliminations		3,509	3,322	6,977	6,554
Eliminations		362	345	719	692
Total net revenues		3,147	2,977	6,258	5,862
Total Segment [Member] | Total management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,524	1,409	3,027	2,739
Total Segment [Member] | Asset management fees - Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		472	460	952	900
Total Segment [Member] | Asset management fees - Institutional [Member] [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		109	106	220	207
Total Segment [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		706	606	1,397	1,176
Total Segment [Member] | Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		80	75	148	139
Total Segment [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		157	162	310	317
Total Segment [Member] | Total Distribution Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		766	708	1,529	1,431
Total Segment [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		252	249	511	537
Total Segment [Member] | Insurance and annuity [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		367	340	726	666
Total Segment [Member] | Other products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		147	119	292	228
Total Segment [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		48	46	90	84
Advice and Wealth Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,487	1,327	2,933	2,603
Revenue from other sources	[1]	76	61	147	116
Total segment gross revenues		1,563	1,388	3,080	2,719
Less: Banking and deposit interest expense		20	12	36	22
Total segment net revenues before eliminations		1,543	1,376	3,044	2,697
Total net revenues		1,296	1,145	2,557	2,229
Advice and Wealth Management [Member] | Intersegment revenues, eliminations [Member]
Disaggregation of Revenue [Line Items]
Eliminations		247	231	487	468
Advice and Wealth Management [Member] | Total management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		878	774	1,726	1,497
Advice and Wealth Management [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		706	606	1,397	1,176
Advice and Wealth Management [Member] | Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		80	75	148	139
Advice and Wealth Management [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		92	93	181	182
Advice and Wealth Management [Member] | Total Distribution Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		562	507	1,119	1,023
Advice and Wealth Management [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		184	178	374	386
Advice and Wealth Management [Member] | Insurance and annuity [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		231	210	453	409
Advice and Wealth Management [Member] | Other products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		147	119	292	228
Advice and Wealth Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		47	46	88	83
Asset Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		740	731	1,494	1,445
Revenue from other sources	[1]	15	16	39	27
Total segment gross revenues		755	747	1,533	1,472
Total segment net revenues before eliminations		755	747	1,533	1,472
Total net revenues		743	735	1,509	1,449
Asset Management [Member] | Intersegment revenues, eliminations [Member]
Disaggregation of Revenue [Line Items]
Eliminations		12	12	24	23
Asset Management [Member] | Total management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		629	619	1,268	1,211
Asset Management [Member] | Asset management fees - Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		472	460	952	900
Asset Management [Member] | Asset management fees - Institutional [Member] [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		109	106	220	207
Asset Management [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		48	53	96	104
Asset Management [Member] | Total Distribution Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		110	112	224	233
Asset Management [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		68	71	137	151
Asset Management [Member] | Insurance and annuity [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		42	41	87	82
Asset Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1		2	1
Annuities [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		99	97	197	188
Revenue from other sources	[1]	523	530	1,038	1,047
Total segment gross revenues		622	627	1,235	1,235
Total segment net revenues before eliminations		622	627	1,235	1,235
Total net revenues		532	540	1,055	1,064
Annuities [Member] | Intersegment revenues, eliminations [Member]
Disaggregation of Revenue [Line Items]
Eliminations		90	87	180	171
Annuities [Member] | Total management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		15	15	29	28
Annuities [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		15	15	29	28
Annuities [Member] | Total Distribution Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		84	82	168	160
Annuities [Member] | Insurance and annuity [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		84	82	168	160
Protection [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		12	8	22	18
Revenue from other sources	[1]	521	509	1,030	1,020
Total segment gross revenues		533	517	1,052	1,038
Total segment net revenues before eliminations		533	517	1,052	1,038
Total net revenues		520	502	1,023	1,008
Protection [Member] | Intersegment revenues, eliminations [Member]
Disaggregation of Revenue [Line Items]
Eliminations		13	15	29	30
Protection [Member] | Total management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2	1	4	3
Protection [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2	1	4	3
Protection [Member] | Total Distribution Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		10	7	18	15
Protection [Member] | Insurance and annuity [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		10	7	18	15
Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			0		0
Revenue from other sources	[1]	57	56	115	113
Total segment gross revenues		57	56	115	113
Less: Banking and deposit interest expense		1	1	2	1
Total segment net revenues before eliminations		56	55	113	112
Total net revenues		56	55	114	112
Corporate and Other [Member] | Intersegment revenues, eliminations [Member]
Disaggregation of Revenue [Line Items]
Eliminations				(1)
Corporate and Other [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			0		0
Non-operating Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from other sources	[1]	55	39	116	84
Total segment gross revenues		55	39	116	84
Total segment net revenues before eliminations		55	39	116	84
Total net revenues		49	35	106	76
Non-operating Revenue [Member] | Intersegment revenues, eliminations [Member]
Disaggregation of Revenue [Line Items]
Eliminations		$ 6	$ 4	$ 10	$ 8

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