Financing Receivables - Credit Quality - Commercial Mortgage Loans by LTV Ratio and Year of Origination (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
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	$ 1
Commercial Loans | Commercial mortgage loans
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	31		$ 77
Year 2	77		110
Year 3	109		188
Year 4	187		109
Year 5	108		203
Prior	1,325		1,145
Total	1,837		1,832
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		0
Year 4	0		0
Year 5	0		2
Prior	24		22
Total	24		24
Commercial Loans | Commercial mortgage loans | 80 to 100 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	0		0
Year 2	0		5
Year 3	5		0
Year 4	0		2
Year 5	0		11
Prior	60		50
Total	65		68
Commercial Loans | Commercial mortgage loans | 60 to 80 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	28		59
Year 2	59		26
Year 3	26		6
Year 4	6		14
Year 5	15		40
Prior	129		106
Total	263		251
Commercial Loans | Commercial mortgage loans | 40 to 60 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	3		8
Year 2	8		47
Year 3	46		133
Year 4	133		53
Year 5	42		70
Prior	386		348
Total	618		659
Commercial Loans | Commercial mortgage loans | Less than 40 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	0		10
Year 2	10		32
Year 3	32		49
Year 4	48		40
Year 5	51		80
Prior	726		619
Total	$ 867		$ 830