Financing Receivables - Credit Quality - Commercial Mortgage Loans by LTV Ratio and Year of Origination (Details) - Commercial Loans - Commercial mortgage loans - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	$ 93	$ 204
Year 2	199	123
Year 3	120	223
Year 4	212	115
Year 5	164	176
Prior	1,132	1,075
Total amortized cost basis	1,920	1,916
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	2	20
Year 4	2	10
Year 5	3	0
Prior	40	29
Total amortized cost basis	47	59
80 to 100 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	2	9
Year 2	9	2
Year 3	2	9
Year 4	20	2
Year 5	7	0
Prior	47	29
Total amortized cost basis	87	51
60 to 80 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	35	142
Year 2	89	80
Year 3	17	60
Year 4	52	23
Year 5	10	61
Prior	98	138
Total amortized cost basis	301	504
40 to 60 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	40	42
Year 2	89	33
Year 3	69	86
Year 4	91	74
Year 5	58	57
Prior	445	401
Total amortized cost basis	792	693
Less than 40 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	16	11
Year 2	12	8
Year 3	30	48
Year 4	47	6
Year 5	86	58
Prior	502	478
Total amortized cost basis	$ 693	$ 609