Investments (Consolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Total Assets	$ 675,745	$ 687,584
Total Liabilities	648,205	657,331
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	686	346
Total Liabilities	141	1
Investment funds (primarily other invested assets and REJV) | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	625	282
Total Liabilities	141	1
Renewable energy partnership (primarily other invested assets) | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	61	64
Total Liabilities	$ 0	$ 0