Revenue from Contract with Customer (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Less: Banking and deposit interest expense		$ 35	$ 16
Total segment net revenues		3,118	3,111
Total net revenues		3,118	3,168
Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		336	361
Total before eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2,267	2,308
Revenue from other sources	[1]	1,224	1,238
Total segment gross revenues		3,491	3,546
Less: Banking and deposit interest expense		37	17
Total segment net revenues		3,454	3,529
Total before eliminations [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,472	1,503
Total before eliminations [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		429	480
Total before eliminations [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		104	111
Total before eliminations [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		725	691
Total before eliminations [Member] | Management and financial advice fees [Member] | Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		69	68
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		145	153
Total before eliminations [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		747	763
Total before eliminations [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		228	259
Total before eliminations [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		334	359
Total before eliminations [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		185	145
Total before eliminations [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		48	42
Total Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2,267	2,308
Revenue from other sources	[1]	1,221	1,177
Total segment gross revenues		3,488	3,485
Less: Banking and deposit interest expense		37	17
Total segment net revenues		3,451	3,468
Total net revenues		3,118	3,111
Total Segment [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		333	357
Total Segment [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,472	1,503
Total Segment [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		429	480
Total Segment [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		104	111
Total Segment [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		725	691
Total Segment [Member] | Management and financial advice fees [Member] | Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		69	68
Total Segment [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		145	153
Total Segment [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		747	763
Total Segment [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		228	259
Total Segment [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		334	359
Total Segment [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		185	145
Total Segment [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		48	42
Advice and Wealth Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,484	1,446
Revenue from other sources	[1]	105	71
Total segment gross revenues		1,589	1,517
Less: Banking and deposit interest expense		35	16
Total segment net revenues		1,554	1,501
Total net revenues		1,335	1,261
Advice and Wealth Management [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		219	240
Advice and Wealth Management [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		878	848
Advice and Wealth Management [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		725	691
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		69	68
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		84	89
Advice and Wealth Management [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		561	557
Advice and Wealth Management [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		171	190
Advice and Wealth Management [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		205	222
Advice and Wealth Management [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		185	145
Advice and Wealth Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		45	41
Asset Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		678	754
Revenue from other sources	[1]	11	24
Total segment gross revenues		689	778
Total segment net revenues		689	778
Total net revenues		676	766
Asset Management [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		13	12
Asset Management [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		579	639
Asset Management [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		429	480
Asset Management [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		104	111
Asset Management [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		46	48
Asset Management [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		98	114
Asset Management [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		57	69
Asset Management [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		41	45
Asset Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1	1
Annuities [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		94	98
Revenue from other sources	[1]	510	515
Total segment gross revenues		604	613
Total segment net revenues		604	613
Total net revenues		516	523
Annuities [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		88	90
Annuities [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		13	14
Annuities [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		13	14
Annuities [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		79	84
Annuities [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		79	84
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	8
Revenue from other sources	[1]	253	245
Total segment gross revenues		262	253
Total segment net revenues		262	253
Total net revenues		247	237
Protection [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		15	16
Protection [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2	1
Protection [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2	1
Protection [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		7	7
Protection [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		7	7
Corporate Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2	2
Revenue from other sources	[1]	342	322
Total segment gross revenues		344	324
Less: Banking and deposit interest expense		2	1
Total segment net revenues		342	323
Total net revenues		344	324
Corporate Segment [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		(2)	(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	1
Corporate Segment [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2	1
Non-operating Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from other sources	[1]	3	61
Total segment gross revenues		3	61
Total segment net revenues		3	61
Total net revenues		0	57
Non-operating Revenue [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		$ 3	$ 4

[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.