Investments (Unconsolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Total Assets	$ 675,745	$ 687,584
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	73,289	70,461
Maximum Exposure to Loss	78,225	76,103
Variable Interest Entity, Not Primary Beneficiary | Fixed Maturity Securities
Variable Interest Entity [Line Items]
Total Assets	57,716	54,182
Maximum Exposure to Loss	57,716	54,182
Variable Interest Entity, Not Primary Beneficiary | Other limited partnership interests
Variable Interest Entity [Line Items]
Total Assets	13,398	14,034
Maximum Exposure to Loss	18,197	19,591
Variable Interest Entity, Not Primary Beneficiary | Other Investments
Variable Interest Entity [Line Items]
Total Assets	1,096	1,039
Maximum Exposure to Loss	1,097	1,055
Variable Interest Entity, Not Primary Beneficiary | Other invested assets
Variable Interest Entity [Line Items]
Total Assets	1,079	1,206
Maximum Exposure to Loss	$ 1,215	$ 1,275