Revenue from Contract with Customer Revenue from Contract with Customer (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Less: Banking and deposit interest expense										$ 89	$ 48	$ 39
Total segment net revenues										12,694	11,993	11,639
Total net revenues		$ 3,179	$ 3,292	$ 3,196	$ 3,168	$ 3,180	$ 3,014	$ 3,012	$ 2,926	12,835	12,132	11,800
Consolidation, Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues										1,431	1,426	1,440
Total before eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										9,336	8,845	8,310
Revenue from other sources	[1]									5,025	4,764	4,970
Total segment gross revenues										14,361	13,609	13,280
Less: Banking and deposit interest expense										95	51	40
Total segment net revenues										14,266	13,558	13,240
Total before eliminations [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										6,120	5,766	5,204
Total before eliminations [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										1,874	1,851	1,754
Total before eliminations [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										453	495	455
Total before eliminations [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										2,865	2,494	2,078
Total before eliminations [Member] | Management and financial advice fees [Member] | Financial Planning Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										318	297	275
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										610	629	642
Total before eliminations [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										3,041	2,913	2,946
Total before eliminations [Member] | Distribution fees [Member] | Mutual Fund [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										989	1,054	1,281
Total before eliminations [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										1,430	1,384	1,327
Total before eliminations [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										622	475	338
Total before eliminations [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										175	166	160
Total Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										9,336	8,845	8,310
Revenue from other sources	[1]									4,867	4,610	4,775
Total segment gross revenues										14,203	13,455	13,085
Less: Banking and deposit interest expense										95	51	40
Total segment net revenues										14,108	13,404	13,045
Total net revenues										12,694	11,993	11,639
Total Segment [Member] | Consolidation, Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues										1,414	1,411	1,406
Total Segment [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										6,120	5,766	5,204
Total Segment [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										1,874	1,851	1,754
Total Segment [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										453	495	455
Total Segment [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										2,865	2,494	2,078
Total Segment [Member] | Management and financial advice fees [Member] | Financial Planning Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										318	297	275
Total Segment [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										610	629	642
Total Segment [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										3,041	2,913	2,946
Total Segment [Member] | Distribution fees [Member] | Mutual Fund [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										989	1,054	1,281
Total Segment [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										1,430	1,384	1,327
Total Segment [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										622	475	338
Total Segment [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										175	166	160
Advice & Wealth Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										5,950	5,412	4,988
Revenue from other sources	[1]									328	252	195
Total segment gross revenues										6,278	5,664	5,183
Less: Banking and deposit interest expense										89	48	39
Total segment net revenues										6,189	5,616	5,144
Total net revenues										5,237	4,663	4,162
Advice & Wealth Management [Member] | Consolidation, Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues										952	953	982
Advice & Wealth Management [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										3,538	3,153	2,711
Advice & Wealth Management [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										2,865	2,494	2,078
Advice & Wealth Management [Member] | Management and financial advice fees [Member] | Financial Planning Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										318	297	275
Advice & Wealth Management [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										355	362	358
Advice & Wealth Management [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										2,241	2,095	2,119
Advice & Wealth Management [Member] | Distribution fees [Member] | Mutual Fund [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										729	765	954
Advice & Wealth Management [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										890	855	827
Advice & Wealth Management [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										622	475	338
Advice & Wealth Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										171	164	158
Asset Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										2,953	3,008	2,918
Revenue from other sources	[1]									58	64	42
Total segment gross revenues										3,011	3,072	2,960
Total segment net revenues										3,011	3,072	2,960
Total net revenues										2,961	3,025	2,916
Asset Management [Member] | Consolidation, Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues										50	47	44
Asset Management [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										2,517	2,548	2,429
Asset Management [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										1,874	1,851	1,754
Asset Management [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										453	495	455
Asset Management [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										190	202	220
Asset Management [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										433	458	487
Asset Management [Member] | Distribution fees [Member] | Mutual Fund [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										260	289	327
Asset Management [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										173	169	160
Asset Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										3	2	2
Annuities [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										389	384	366
Revenue from other sources	[1]									2,087	2,115	2,097
Total segment gross revenues										2,476	2,499	2,463
Total segment net revenues										2,476	2,499	2,463
Total net revenues										2,120	2,148	2,130
Annuities [Member] | Consolidation, Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues										356	351	333
Annuities [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										57	57	56
Annuities [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										57	57	56
Annuities [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										332	327	310
Annuities [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										332	327	310
Protection [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										44	41	38
Revenue from other sources	[1]									2,162	2,003	2,203
Total segment gross revenues										2,206	2,044	2,241
Total segment net revenues										2,206	2,044	2,241
Total net revenues										2,145	1,982	2,195
Protection [Member] | Consolidation, Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues										61	62	46
Protection [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										8	8	8
Protection [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										8	8	8
Protection [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										35	33	30
Protection [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										35	33	30
Protection [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers										1
Corporate Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue from other sources	[1]									232	176	238
Total segment gross revenues										232	176	238
Less: Banking and deposit interest expense										6	3	1
Total segment net revenues										226	173	237
Total net revenues										231	175	236
Corporate Segment [Member] | Consolidation, Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues										(5)	(2)	1
Non-Operating [Member]
Disaggregation of Revenue [Line Items]
Revenue from other sources	[1]									158	154	195
Total segment gross revenues										158	154	195
Total segment net revenues										158	154	195
Total net revenues										141	139	161
Non-Operating [Member] | Consolidation, Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues										$ 17	$ 15	$ 34

[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.