Financing Receivables - Credit Quality - Commercial Mortgage Loans by LTV Ratio and Year of Origination (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Amortized cost basis by year of origination and loan-to-value ratio
Loan write-offs	$ 3	$ 1
Commercial Loans
Amortized cost basis by year of origination and loan-to-value ratio
Loan write-offs	2	$ 0
Commercial Loans | Commercial mortgage loans
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	35		$ 112
Year 2	111		197
Year 3	190		120
Year 4	110		210
Year 5	204		162
Prior	1,173		1,081
Total amortized cost basis	1,823		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	25		39
Total amortized cost basis	27		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	50		29
Total amortized cost basis	68		75
Commercial Loans | Commercial mortgage loans | 60 to 80 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	19		39
Year 2	27		87
Year 3	6		17
Year 4	14		52
Year 5	40		9
Prior	117		107
Total amortized cost basis	223		311
Commercial Loans | Commercial mortgage loans | 40 to 60 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	7		48
Year 2	47		89
Year 3	134		69
Year 4	53		90
Year 5	70		57
Prior	372		435
Total amortized cost basis	683		788
Commercial Loans | Commercial mortgage loans | Less than 40 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	9		18
Year 2	32		12
Year 3	50		30
Year 4	41		46
Year 5	81		85
Prior	609		471
Total amortized cost basis	$ 822		$ 662