Financing Receivables - Credit Quality - Commercial Mortgage Loans by LTV Ratio and Year of Origination (Details) - Commercial Loans - Commercial mortgage loans - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	$ 78	$ 204
Year 2	201	123
Year 3	121	223
Year 4	171	115
Year 5	166	176
Prior	1,201	1,075
Total amortized cost basis	1,938	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	41	29
Total amortized cost basis	48	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	9	0
Prior	48	29
Total amortized cost basis	90	51
60 to 80 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	34	142
Year 2	94	80
Year 3	17	60
Year 4	58	23
Year 5	8	61
Prior	100	138
Total amortized cost basis	311	504
40 to 60 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	34	42
Year 2	85	33
Year 3	70	86
Year 4	87	74
Year 5	63	57
Prior	460	401
Total amortized cost basis	799	693
Less than 40 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	8	11
Year 2	13	8
Year 3	30	48
Year 4	4	6
Year 5	83	58
Prior	552	478
Total amortized cost basis	$ 690	$ 609