Employee Benefit Arrangements - Obligations in Excess of Plan Assets (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1,773	$ 1,831
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	1,912	1,999	$ 1,943
Fair value of plan assets	$ 1,773	$ 1,831	$ 1,770