Financing Receivables - Credit Quality - Commercial Mortgage Loans by Region (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Financing receivables - credit quality information
Less: allowance for loan losses	$ 59	$ 59	$ 48	$ 50
Commercial Loans
Financing receivables - credit quality information
Less: allowance for loan losses	52	54	45	47
Commercial Loans | Commercial mortgage loans
Financing receivables - credit quality information
Loans	1,861	1,882
Less: allowance for loan losses	11	11
Total loans	1,850	1,871
Year 1	15	112
Year 2	111	197
Year 3	195	120
Year 4	112	210
Year 5	209	162
Prior	1,219	1,081
Commercial Loans | Commercial mortgage loans | Apartments
Financing receivables - credit quality information
Loans	489	495
Commercial Loans | Commercial mortgage loans | Hotel
Financing receivables - credit quality information
Loans	14	14
Commercial Loans | Commercial mortgage loans | Industrial
Financing receivables - credit quality information
Loans	310	321
Commercial Loans | Commercial mortgage loans | Mixed use
Financing receivables - credit quality information
Loans	68	66
Commercial Loans | Commercial mortgage loans | Office
Financing receivables - credit quality information
Loans	256	259
Commercial Loans | Commercial mortgage loans | Retail
Financing receivables - credit quality information
Loans	581	594
Commercial Loans | Commercial mortgage loans | Other
Financing receivables - credit quality information
Loans	143	133
Commercial Loans | Commercial mortgage loans | Greater than 100 Percent
Financing receivables - credit quality information
Loans	45	46
Year 1	0	0
Year 2	0	0
Year 3	0	2
Year 4	2	2
Year 5	2	3
Prior	41	39
Commercial Loans | Commercial mortgage loans | 80 to 100 Percent
Financing receivables - credit quality information
Loans	72	75
Year 1	0	7
Year 2	7	9
Year 3	6	2
Year 4	2	20
Year 5	19	8
Prior	38	29
Commercial Loans | Commercial mortgage loans | 60 to 80 Percent
Financing receivables - credit quality information
Loans	270	311
Year 1	12	39
Year 2	38	87
Year 3	61	17
Year 4	17	52
Year 5	41	9
Prior	101	107
Commercial Loans | Commercial mortgage loans | 40 to 60 Percent
Financing receivables - credit quality information
Loans	746	788
Year 1	3	48
Year 2	33	89
Year 3	101	69
Year 4	56	90
Year 5	89	57
Prior	464	435
Commercial Loans | Commercial mortgage loans | Less than 40 Percent
Financing receivables - credit quality information
Loans	728	662
Year 1	0	18
Year 2	33	12
Year 3	27	30
Year 4	35	46
Year 5	58	85
Prior	575	471
Commercial Loans | Commercial mortgage loans | East North Central
Financing receivables - credit quality information
Loans	199	201
Commercial Loans | Commercial mortgage loans | East South Central
Financing receivables - credit quality information
Loans	53	54
Commercial Loans | Commercial mortgage loans | Middle Atlantic
Financing receivables - credit quality information
Loans	114	114
Commercial Loans | Commercial mortgage loans | Mountain
Financing receivables - credit quality information
Loans	135	129
Commercial Loans | Commercial mortgage loans | New England
Financing receivables - credit quality information
Loans	23	23
Commercial Loans | Commercial mortgage loans | Pacific
Financing receivables - credit quality information
Loans	633	638
Commercial Loans | Commercial mortgage loans | South Atlantic
Financing receivables - credit quality information
Loans	465	479
Commercial Loans | Commercial mortgage loans | West North Central
Financing receivables - credit quality information
Loans	118	120
Commercial Loans | Commercial mortgage loans | West South Central
Financing receivables - credit quality information
Loans	121	124
Commercial Loans | Syndicated loans
Financing receivables - credit quality information
Loans	165	175
Year 1	1	15
Year 2	14	39
Year 3	38	12
Year 4	12	26
Year 5	25	23
Prior	75	60
Commercial Loans | Syndicated loans | Risk 5
Financing receivables - credit quality information
Loans	3	1
Year 1	0	1
Year 2	1	0
Year 3	0	0
Year 4	0	0
Year 5	0	0
Prior	2	0
Commercial Loans | Syndicated loans | Risk 4
Financing receivables - credit quality information
Loans	3	4
Year 1	0	0
Year 2	0	0
Year 3	0	0
Year 4	1	2
Year 5	2	0
Prior	0	2
Commercial Loans | Syndicated loans | Risk 3
Financing receivables - credit quality information
Loans	24	29
Year 1	0	0
Year 2	0	9
Year 3	8	1
Year 4	1	6
Year 5	3	5
Prior	12	8
Commercial Loans | Syndicated loans | Risk 2
Financing receivables - credit quality information
Loans	74	81
Year 1	0	8
Year 2	9	21
Year 3	21	7
Year 4	6	12
Year 5	11	5
Prior	27	28
Commercial Loans | Syndicated loans | Risk 1
Financing receivables - credit quality information
Loans	61	60
Year 1	1	6
Year 2	4	9
Year 3	9	4
Year 4	4	6
Year 5	9	13
Prior	34	22
Commercial Loans | Loans to financial advisors
Financing receivables - credit quality information
Loans	1,070	1,013
Year 1	108	359
Year 2	346	179
Year 3	171	134
Year 4	128	101
Year 5	98	77
Prior	219	163
Commercial Loans | Loans to financial advisors | Active
Financing receivables - credit quality information
Loans	1,059	1,003
Year 1	108	359
Year 2	346	178
Year 3	170	133
Year 4	127	99
Year 5	95	76
Prior	213	158
Commercial Loans | Loans to financial advisors | Terminated
Financing receivables - credit quality information
Loans	11	10
Less: allowance for loan losses	7	6
Year 1	0	0
Year 2	0	1
Year 3	1	1
Year 4	1	2
Year 5	3	1
Prior	6	5
Consumer Loans
Financing receivables - credit quality information
Less: allowance for loan losses	7	5	$ 3	$ 3
Consumer Loans | Credit card receivables
Financing receivables - credit quality information
Loans	104	110
Consumer Loans | Credit card receivables | FICO Score, Greater than 800
Financing receivables - credit quality information
Loans	28	32
Consumer Loans | Credit card receivables | FICO Score, 750-799
Financing receivables - credit quality information
Loans	26	27
Consumer Loans | Credit card receivables | FICO Score, 700-749
Financing receivables - credit quality information
Loans	27	28
Consumer Loans | Credit card receivables | FICO Score. 650 to 699
Financing receivables - credit quality information
Loans	17	17
Consumer Loans | Credit card receivables | FICO Score, Less than 650
Financing receivables - credit quality information
Loans	$ 6	$ 6
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans
Financing receivables - credit quality information
Percentage of total	100.00%	100.00%
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | Apartments
Financing receivables - credit quality information
Percentage of total	26.00%	26.00%
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | Hotel
Financing receivables - credit quality information
Percentage of total	1.00%	1.00%
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | Industrial
Financing receivables - credit quality information
Percentage of total	17.00%	17.00%
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | Mixed use
Financing receivables - credit quality information
Percentage of total	3.00%	4.00%
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | Office
Financing receivables - credit quality information
Percentage of total	14.00%	14.00%
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | Retail
Financing receivables - credit quality information
Percentage of total	31.00%	31.00%
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | Other
Financing receivables - credit quality information
Percentage of total	8.00%	7.00%
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | East North Central
Financing receivables - credit quality information
Percentage of total	11.00%	11.00%
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | East South Central
Financing receivables - credit quality information
Percentage of total	3.00%	3.00%
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | Middle Atlantic
Financing receivables - credit quality information
Percentage of total	6.00%	6.00%
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | Mountain
Financing receivables - credit quality information
Percentage of total	7.00%	7.00%
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | New England
Financing receivables - credit quality information
Percentage of total	1.00%	1.00%
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | Pacific
Financing receivables - credit quality information
Percentage of total	34.00%	34.00%
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | South Atlantic
Financing receivables - credit quality information
Percentage of total	25.00%	25.00%
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | West North Central
Financing receivables - credit quality information
Percentage of total	6.00%	6.00%
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | West South Central
Financing receivables - credit quality information
Percentage of total	7.00%	7.00%