Financing Receivables - Credit Quality - Commercial Mortgage Loans by LTV Ratio and Year of Origination (Details) - Commercial Loans - Commercial mortgage loans - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	$ 42	$ 204
Year 2	203	123
Year 3	122	223
Year 4	174	115
Year 5	168	176
Prior	1,225	1,075
Total amortized cost basis	1,934	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	0	20
Year 4	11	10
Year 5	10	0
Prior	15	29
Total amortized cost basis	36	59
80 to 100 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	0	9
Year 2	9	2
Year 3	0	9
Year 4	26	2
Year 5	2	0
Prior	39	29
Total amortized cost basis	76	51
60 to 80 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	21	142
Year 2	99	80
Year 3	66	60
Year 4	48	23
Year 5	22	61
Prior	164	138
Total amortized cost basis	420	504
40 to 60 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	17	42
Year 2	81	33
Year 3	30	86
Year 4	87	74
Year 5	63	57
Prior	478	401
Total amortized cost basis	756	693
Less than 40 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	4	11
Year 2	14	8
Year 3	26	48
Year 4	2	6
Year 5	71	58
Prior	529	478
Total amortized cost basis	$ 646	$ 609