Investments (Unconsolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Total Assets	$ 704,976	$ 687,584
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	75,886	70,461
Maximum Exposure to Loss	80,676	76,103
Variable Interest Entity, Not Primary Beneficiary | Fixed Maturity Securities
Variable Interest Entity [Line Items]
Total Assets	60,218	54,182
Maximum Exposure to Loss	60,218	54,182
Variable Interest Entity, Not Primary Beneficiary | Other limited partnership interests
Variable Interest Entity [Line Items]
Total Assets	13,300	14,034
Maximum Exposure to Loss	17,937	19,591
Variable Interest Entity, Not Primary Beneficiary | Other Investments
Variable Interest Entity [Line Items]
Total Assets	1,307	1,039
Maximum Exposure to Loss	1,324	1,055
Variable Interest Entity, Not Primary Beneficiary | Other invested assets
Variable Interest Entity [Line Items]
Total Assets	1,061	1,206
Maximum Exposure to Loss	$ 1,197	$ 1,275