Revenue from Contract with Customer (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Less: Banking and deposit interest expense		$ 25	$ 35
Total segment net revenues		2,951	3,118
Total net revenues		3,001	3,118
Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		340	336
Total before eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2,406	2,267
Revenue from other sources	[1]	961	1,224
Total segment gross revenues		3,367	3,491
Less: Banking and deposit interest expense		26	37
Total segment net revenues		3,341	3,454
Total before eliminations [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,618	1,472
Total before eliminations [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		447	429
Total before eliminations [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		85	104
Total before eliminations [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		854	725
Total before eliminations [Member] | Management and financial advice fees [Member] | Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		81	69
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		151	145
Total before eliminations [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		737	747
Total before eliminations [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		244	228
Total before eliminations [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		337	334
Total before eliminations [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		156	185
Total before eliminations [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		51	48
Total Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2,406	2,267
Revenue from other sources	[1]	909	1,221
Total segment gross revenues		3,315	3,488
Less: Banking and deposit interest expense		26	37
Total segment net revenues		3,289	3,451
Total net revenues		2,951	3,118
Total Segment [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		338	333
Total Segment [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,618	1,472
Total Segment [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		447	429
Total Segment [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		85	104
Total Segment [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		854	725
Total Segment [Member] | Management and financial advice fees [Member] | Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		81	69
Total Segment [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		151	145
Total Segment [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		737	747
Total Segment [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		244	228
Total Segment [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		337	334
Total Segment [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		156	185
Total Segment [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		51	48
Advice and Wealth Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,619	1,484
Revenue from other sources	[1]	101	105
Total segment gross revenues		1,720	1,589
Less: Banking and deposit interest expense		25	35
Total segment net revenues		1,695	1,554
Total net revenues		1,473	1,335
Advice and Wealth Management [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		222	219
Advice and Wealth Management [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,024	878
Advice and Wealth Management [Member] | Management and financial advice fees [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		854	725
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		81	69
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		89	84
Advice and Wealth Management [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		548	561
Advice and Wealth Management [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		184	171
Advice and Wealth Management [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		208	205
Advice and Wealth Management [Member] | Distribution fees [Member] | Other Investments [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		156	185
Advice and Wealth Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		47	45
Asset Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		683	678
Revenue from other sources	[1]	3	11
Total segment gross revenues		686	689
Total segment net revenues		686	689
Total net revenues		673	676
Asset Management [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		13	13
Asset Management [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		579	579
Asset Management [Member] | Management and financial advice fees [Member] | Asset Management: Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		447	429
Asset Management [Member] | Management and financial advice fees [Member] | Asset Management: Institutional [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		85	104
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	46
Asset Management [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		103	98
Asset Management [Member] | Distribution fees [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		60	57
Asset Management [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		43	41
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		92	94
Revenue from other sources	[1]	497	510
Total segment gross revenues		589	604
Total segment net revenues		589	604
Total net revenues		499	516
Annuities [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		90	88
Annuities [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		13	13
Annuities [Member] | Management and financial advice fees [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		13	13
Annuities [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		79	79
Annuities [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		79	79
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
Revenue from other sources	[1]	248	253
Total segment gross revenues		257	262
Total segment net revenues		257	262
Total net revenues		243	247
Protection [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		14	15
Protection [Member] | Management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2	2
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
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		3	2
Revenue from other sources	[1]	60	342
Total segment gross revenues		63	344
Less: Banking and deposit interest expense		1	2
Total segment net revenues		62	342
Total net revenues		63	344
Corporate Segment [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		(1)	(2)
Corporate Segment [Member] | Distribution fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			2
Corporate Segment [Member] | Distribution fees [Member] | Insurance and annuity products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			2
Corporate Segment [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		3
Non-operating Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from other sources	[1]	52	3
Total segment gross revenues		52	3
Total segment net revenues		52	3
Total net revenues		50	0
Non-operating Revenue [Member] | Consolidation, eliminations [Member]
Disaggregation of Revenue [Line Items]
Total segment net revenues		$ 2	$ 3

[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.