Investments (Unconsolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Total Assets	$ 677,457	$ 687,584
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	76,660	70,461
Maximum Exposure to Loss	81,320	76,103
Variable Interest Entity, Not Primary Beneficiary | Fixed Maturity Securities
Variable Interest Entity [Line Items]
Total Assets	60,386	54,182
Maximum Exposure to Loss	60,386	54,182
Variable Interest Entity, Not Primary Beneficiary | Other limited partnership interests
Variable Interest Entity [Line Items]
Total Assets	13,529	14,034
Maximum Exposure to Loss	17,991	19,591
Variable Interest Entity, Not Primary Beneficiary | Other invested assets
Variable Interest Entity [Line Items]
Total Assets	1,085	1,206
Maximum Exposure to Loss	1,242	1,275
Variable Interest Entity, Not Primary Beneficiary | Other Investments
Variable Interest Entity [Line Items]
Total Assets	1,660	1,039
Maximum Exposure to Loss	$ 1,701	$ 1,055