Financing Receivables - Credit Quality - Commercial Mortgage Loans by LTV Ratio and Year of Origination (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Amortized cost basis by year of origination and loan-to-value ratio
Loan write-offs	$ 1
Commercial Loans
Amortized cost basis by year of origination and loan-to-value ratio
Loan write-offs	1
Commercial Loans | Commercial mortgage loans
Amortized cost basis by year of origination and loan-to-value ratio
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
Total amortized cost basis	1,861	1,882
Loan write-offs	0
Commercial Loans | Commercial mortgage loans | Greater than 100 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	0	0
Year 2	0	0
Year 3	0	2
Year 4	2	2
Year 5	2	3
Prior	41	39
Total amortized cost basis	45	46
Commercial Loans | Commercial mortgage loans | 80 to 100 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	0	7
Year 2	7	9
Year 3	6	2
Year 4	2	20
Year 5	19	8
Prior	38	29
Total amortized cost basis	72	75
Commercial Loans | Commercial mortgage loans | 60 to 80 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	12	39
Year 2	38	87
Year 3	61	17
Year 4	17	52
Year 5	41	9
Prior	101	107
Total amortized cost basis	270	311
Commercial Loans | Commercial mortgage loans | 40 to 60 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	3	48
Year 2	33	89
Year 3	101	69
Year 4	56	90
Year 5	89	57
Prior	464	435
Total amortized cost basis	746	788
Commercial Loans | Commercial mortgage loans | Less than 40 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	0	18
Year 2	33	12
Year 3	27	30
Year 4	35	46
Year 5	58	85
Prior	575	471
Total amortized cost basis	$ 728	$ 662