Financing Receivables - Credit Quality - Commercial Mortgage Loans by LTV Ratio and Year of Origination (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Amortized cost basis by year of origination and loan-to-value ratio
Loan write-offs	$ 2	$ 1
Commercial Loans
Amortized cost basis by year of origination and loan-to-value ratio
Loan write-offs	1	$ 0
Commercial Loans | Commercial mortgage loans
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	27		$ 112
Year 2	111		197
Year 3	192		120
Year 4	111		210
Year 5	206		162
Prior	1,196		1,081
Total amortized cost basis	1,843		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	0		2
Year 5	2		3
Prior	23		39
Total amortized cost basis	25		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	5		9
Year 3	0		2
Year 4	2		20
Year 5	11		8
Prior	53		29
Total amortized cost basis	71		75
Commercial Loans | Commercial mortgage loans | 60 to 80 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	16		39
Year 2	27		87
Year 3	8		17
Year 4	14		52
Year 5	41		9
Prior	122		107
Total amortized cost basis	228		311
Commercial Loans | Commercial mortgage loans | 40 to 60 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	4		48
Year 2	47		89
Year 3	133		69
Year 4	54		90
Year 5	70		57
Prior	395		435
Total amortized cost basis	703		788
Commercial Loans | Commercial mortgage loans | Less than 40 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	7		18
Year 2	32		12
Year 3	51		30
Year 4	41		46
Year 5	82		85
Prior	603		471
Total amortized cost basis	$ 816		$ 662