Other Contract Holder Funds - Account Balances by Guaranteed Minimum Interest Rates (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Variable Annuities
Policyholder Account Balance [Line Items]
Account values with crediting rates	$ 6,540	$ 7,206
Variable Annuities \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	$ 0	$ 10
Variable Annuities \| 0.00%-1.50% \| Minimum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	0.00%	0.00%
Variable Annuities \| 0.00%-1.50% \| Maximum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	1.50%	1.50%
Variable Annuities \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	$ 141	$ 153
Variable Annuities \| 1.51%-2.50% \| Minimum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	1.51%	1.51%
Variable Annuities \| 1.51%-2.50% \| Maximum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	2.50%	2.50%
Variable Annuities \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	2.50%	2.50%
Account values with crediting rates	$ 6,399	$ 7,043
Variable Annuities \| At Guaranteed Minimum
Policyholder Account Balance [Line Items]
Account values with crediting rates	6,456	7,196
Variable Annuities \| At Guaranteed Minimum \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Variable Annuities \| At Guaranteed Minimum \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	140	153
Variable Annuities \| At Guaranteed Minimum \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	6,316	7,043
Variable Annuities \| 1 Basis Point-50 Basis Points Above
Policyholder Account Balance [Line Items]
Account values with crediting rates	83	10
Variable Annuities \| 1 Basis Point-50 Basis Points Above \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	10
Variable Annuities \| 1 Basis Point-50 Basis Points Above \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Variable Annuities \| 1 Basis Point-50 Basis Points Above \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	83	0
Variable Annuities \| 51 Basis Points-150 Basis Points Above
Policyholder Account Balance [Line Items]
Account values with crediting rates	1	0
Variable Annuities \| 51 Basis Points-150 Basis Points Above \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Variable Annuities \| 51 Basis Points-150 Basis Points Above \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	1	0
Variable Annuities \| 51 Basis Points-150 Basis Points Above \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Variable Annuities \| Greater Than 150 Basis Points Above
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Variable Annuities \| Greater Than 150 Basis Points Above \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Variable Annuities \| Greater Than 150 Basis Points Above \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Variable Annuities \| Greater Than 150 Basis Points Above \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
RILA
Policyholder Account Balance [Line Items]
Account values with crediting rates	156	112
RILA \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	$ 12	$ 13
RILA \| 0.00%-1.50% \| Minimum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	0.00%	0.00%
RILA \| 0.00%-1.50% \| Maximum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	1.50%	1.50%
RILA \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	$ 0	$ 0
RILA \| 1.51%-2.50% \| Minimum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	1.51%	1.51%
RILA \| 1.51%-2.50% \| Maximum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	2.50%	2.50%
RILA \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	2.50%	2.50%
Account values with crediting rates	$ 144	$ 99
RILA \| At Guaranteed Minimum
Policyholder Account Balance [Line Items]
Account values with crediting rates	91	95
RILA \| At Guaranteed Minimum \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	5	6
RILA \| At Guaranteed Minimum \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
RILA \| At Guaranteed Minimum \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	86	89
RILA \| 1 Basis Point-50 Basis Points Above
Policyholder Account Balance [Line Items]
Account values with crediting rates	58	10
RILA \| 1 Basis Point-50 Basis Points Above \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
RILA \| 1 Basis Point-50 Basis Points Above \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
RILA \| 1 Basis Point-50 Basis Points Above \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	58	10
RILA \| 51 Basis Points-150 Basis Points Above
Policyholder Account Balance [Line Items]
Account values with crediting rates	3	3
RILA \| 51 Basis Points-150 Basis Points Above \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	3	3
RILA \| 51 Basis Points-150 Basis Points Above \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
RILA \| 51 Basis Points-150 Basis Points Above \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
RILA \| Greater Than 150 Basis Points Above
Policyholder Account Balance [Line Items]
Account values with crediting rates	4	4
RILA \| Greater Than 150 Basis Points Above \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	4	4
RILA \| Greater Than 150 Basis Points Above \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
RILA \| Greater Than 150 Basis Points Above \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Fixed Index Annuities
Policyholder Account Balance [Line Items]
Account values with crediting rates	197	190
Fixed Index Annuities \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	$ 46	$ 51
Fixed Index Annuities \| 0.00%-1.50% \| Minimum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	0.00%	0.00%
Fixed Index Annuities \| 0.00%-1.50% \| Maximum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	1.50%	1.50%
Fixed Index Annuities \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	$ 0	$ 0
Fixed Index Annuities \| 1.51%-2.50% \| Minimum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	1.51%	1.51%
Fixed Index Annuities \| 1.51%-2.50% \| Maximum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	2.50%	2.50%
Fixed Index Annuities \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	2.50%	2.50%
Account values with crediting rates	$ 151	$ 139
Fixed Index Annuities \| At Guaranteed Minimum
Policyholder Account Balance [Line Items]
Account values with crediting rates	20	20
Fixed Index Annuities \| At Guaranteed Minimum \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	3	3
Fixed Index Annuities \| At Guaranteed Minimum \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Fixed Index Annuities \| At Guaranteed Minimum \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	17	17
Fixed Index Annuities \| 1 Basis Point-50 Basis Points Above
Policyholder Account Balance [Line Items]
Account values with crediting rates	12	8
Fixed Index Annuities \| 1 Basis Point-50 Basis Points Above \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	12	8
Fixed Index Annuities \| 1 Basis Point-50 Basis Points Above \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Fixed Index Annuities \| 1 Basis Point-50 Basis Points Above \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Fixed Index Annuities \| 51 Basis Points-150 Basis Points Above
Policyholder Account Balance [Line Items]
Account values with crediting rates	91	96
Fixed Index Annuities \| 51 Basis Points-150 Basis Points Above \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	2	2
Fixed Index Annuities \| 51 Basis Points-150 Basis Points Above \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Fixed Index Annuities \| 51 Basis Points-150 Basis Points Above \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	89	94
Fixed Index Annuities \| Greater Than 150 Basis Points Above
Policyholder Account Balance [Line Items]
Account values with crediting rates	74	66
Fixed Index Annuities \| Greater Than 150 Basis Points Above \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	29	38
Fixed Index Annuities \| Greater Than 150 Basis Points Above \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Fixed Index Annuities \| Greater Than 150 Basis Points Above \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	45	28
Fixed Annuities
Policyholder Account Balance [Line Items]
Account values with crediting rates	3,349	2,515
Fixed Annuities \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	$ 104	$ 107
Fixed Annuities \| 0.00%-1.50% \| Minimum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	0.00%	0.00%
Fixed Annuities \| 0.00%-1.50% \| Maximum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	1.50%	1.50%
Fixed Annuities \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	$ 18	$ 26
Fixed Annuities \| 1.51%-2.50% \| Minimum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	1.51%	1.51%
Fixed Annuities \| 1.51%-2.50% \| Maximum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	2.50%	2.50%
Fixed Annuities \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	2.50%	2.50%
Account values with crediting rates	$ 3,227	$ 2,382
Fixed Annuities \| At Guaranteed Minimum
Policyholder Account Balance [Line Items]
Account values with crediting rates	2,958	2,133
Fixed Annuities \| At Guaranteed Minimum \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	27	34
Fixed Annuities \| At Guaranteed Minimum \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	16	24
Fixed Annuities \| At Guaranteed Minimum \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	2,915	2,075
Fixed Annuities \| 1 Basis Point-50 Basis Points Above
Policyholder Account Balance [Line Items]
Account values with crediting rates	76	86
Fixed Annuities \| 1 Basis Point-50 Basis Points Above \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	40	44
Fixed Annuities \| 1 Basis Point-50 Basis Points Above \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	1	1
Fixed Annuities \| 1 Basis Point-50 Basis Points Above \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	35	41
Fixed Annuities \| 51 Basis Points-150 Basis Points Above
Policyholder Account Balance [Line Items]
Account values with crediting rates	15	30
Fixed Annuities \| 51 Basis Points-150 Basis Points Above \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	14	28
Fixed Annuities \| 51 Basis Points-150 Basis Points Above \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	1	1
Fixed Annuities \| 51 Basis Points-150 Basis Points Above \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	1
Fixed Annuities \| Greater Than 150 Basis Points Above
Policyholder Account Balance [Line Items]
Account values with crediting rates	300	266
Fixed Annuities \| Greater Than 150 Basis Points Above \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	23	1
Fixed Annuities \| Greater Than 150 Basis Points Above \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Fixed Annuities \| Greater Than 150 Basis Points Above \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	277	265
Closed Block Life
Policyholder Account Balance [Line Items]
Account values with crediting rates	6,438	6,627
Closed Block Life \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	$ 0	$ 0
Closed Block Life \| 0.00%-1.50% \| Minimum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	0.00%	0.00%
Closed Block Life \| 0.00%-1.50% \| Maximum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	1.50%	1.50%
Closed Block Life \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	$ 11	$ 12
Closed Block Life \| 1.51%-2.50% \| Minimum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	1.51%	1.51%
Closed Block Life \| 1.51%-2.50% \| Maximum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	2.50%	2.50%
Closed Block Life \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	2.50%	2.50%
Account values with crediting rates	$ 6,427	$ 6,615
Closed Block Life \| At Guaranteed Minimum
Policyholder Account Balance [Line Items]
Account values with crediting rates	5,303	5,462
Closed Block Life \| At Guaranteed Minimum \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Closed Block Life \| At Guaranteed Minimum \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	1	1
Closed Block Life \| At Guaranteed Minimum \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	5,302	5,461
Closed Block Life \| 1 Basis Point-50 Basis Points Above
Policyholder Account Balance [Line Items]
Account values with crediting rates	402	414
Closed Block Life \| 1 Basis Point-50 Basis Points Above \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Closed Block Life \| 1 Basis Point-50 Basis Points Above \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	10	11
Closed Block Life \| 1 Basis Point-50 Basis Points Above \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	392	403
Closed Block Life \| 51 Basis Points-150 Basis Points Above
Policyholder Account Balance [Line Items]
Account values with crediting rates	728	746
Closed Block Life \| 51 Basis Points-150 Basis Points Above \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Closed Block Life \| 51 Basis Points-150 Basis Points Above \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Closed Block Life \| 51 Basis Points-150 Basis Points Above \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	728	746
Closed Block Life \| Greater Than 150 Basis Points Above
Policyholder Account Balance [Line Items]
Account values with crediting rates	5	5
Closed Block Life \| Greater Than 150 Basis Points Above \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Closed Block Life \| Greater Than 150 Basis Points Above \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Closed Block Life \| Greater Than 150 Basis Points Above \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	5	5
Closed Block Annuity
Policyholder Account Balance [Line Items]
Account values with crediting rates	945	1,006
Closed Block Annuity \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	$ 0	$ 0
Closed Block Annuity \| 0.00%-1.50% \| Minimum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	0.00%	0.00%
Closed Block Annuity \| 0.00%-1.50% \| Maximum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	1.50%	1.50%
Closed Block Annuity \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	$ 12	$ 12
Closed Block Annuity \| 1.51%-2.50% \| Minimum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	1.51%	1.51%
Closed Block Annuity \| 1.51%-2.50% \| Maximum
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	2.50%	2.50%
Closed Block Annuity \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Range of Guaranteed Minimum Crediting Rate	2.50%	2.50%
Account values with crediting rates	$ 933	$ 994
Closed Block Annuity \| At Guaranteed Minimum
Policyholder Account Balance [Line Items]
Account values with crediting rates	891	950
Closed Block Annuity \| At Guaranteed Minimum \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Closed Block Annuity \| At Guaranteed Minimum \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Closed Block Annuity \| At Guaranteed Minimum \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	891	950
Closed Block Annuity \| 1 Basis Point-50 Basis Points Above
Policyholder Account Balance [Line Items]
Account values with crediting rates	18	19
Closed Block Annuity \| 1 Basis Point-50 Basis Points Above \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Closed Block Annuity \| 1 Basis Point-50 Basis Points Above \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Closed Block Annuity \| 1 Basis Point-50 Basis Points Above \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	18	19
Closed Block Annuity \| 51 Basis Points-150 Basis Points Above
Policyholder Account Balance [Line Items]
Account values with crediting rates	25	26
Closed Block Annuity \| 51 Basis Points-150 Basis Points Above \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Closed Block Annuity \| 51 Basis Points-150 Basis Points Above \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	1	1
Closed Block Annuity \| 51 Basis Points-150 Basis Points Above \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	24	25
Closed Block Annuity \| Greater Than 150 Basis Points Above
Policyholder Account Balance [Line Items]
Account values with crediting rates	11	11
Closed Block Annuity \| Greater Than 150 Basis Points Above \| 0.00%-1.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	0	0
Closed Block Annuity \| Greater Than 150 Basis Points Above \| 1.51%-2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	11	11
Closed Block Annuity \| Greater Than 150 Basis Points Above \| Greater than 2.50%
Policyholder Account Balance [Line Items]
Account values with crediting rates	$ 0	$ 0

Jackson Financial Inc. 10-Q