Employee Benefit Arrangements - Obligations and Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Change in plan assets:
Fair value of plan assets, beginning balance	$ 1,831
Fair value of plan assets, ending balance	1,773	$ 1,831
Pension Plan
Change in benefit obligation:
Benefits obligations, beginning balance	1,999	1,943
Service cost	30	24	$ 28
Interest cost	102	103	72
Net actuarial (gains) losses	(98)	44
Benefits paid	(121)	(115)
Benefits obligations, ending balance	$ 1,912	$ 1,999	1,943
Discount rate, benefit obligation	5.88%	5.28%
Interest credit rate	3.75%	3.75%
Change in plan assets:
Fair value of plan assets, beginning balance	$ 1,831	$ 1,770
Actual return on plan assets	36	149
Employer contributions	28	27
Benefits paid	(122)	(115)
Fair value of plan assets, ending balance	1,773	1,831	$ 1,770
Funded status at end of the year	(139)	(168)
Actuarial gain (loss) due to discount rate	$ 110	$ (37)
Increase in discount rate	0.60%
decrease in discount rate		0.19%
Amounts recognized in the Consolidated Balance Sheets consist of:
Prepaid benefit cost	$ 192	$ 182
Accrued benefit cost	(331)	(350)
Net amount recognized	(139)	(168)
Pension Plan | Qualified Plan
Change in benefit obligation:
Benefits obligations, beginning balance	1,649
Benefits obligations, ending balance	1,581	1,649
Pension Plan | Nonqualified pension plan
Change in benefit obligation:
Benefits obligations, beginning balance	350
Benefits obligations, ending balance	$ 331	$ 350