Employee Benefit Arrangements - Pension, Other Postretirement Benefit Plans and Other Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Annual credit earned by participants, percentage of eligible compensation	4.00%
Deferred compensation commitment	$ 330	$ 302
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	1,912	1,999	$ 1,943
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(1)	23	(14)
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	8	9
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 1	$ (1)	$ (2)