Investments (Unconsolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Variable Interest Entity [Line Items]
Total Assets	$ 688,316	$ 677,457
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	81,566	76,660
Maximum Exposure to Loss	86,043	81,320
Variable Interest Entity, Not Primary Beneficiary | Fixed Maturity Securities
Variable Interest Entity [Line Items]
Total Assets	65,608	60,386
Maximum Exposure to Loss	65,608	60,386
Variable Interest Entity, Not Primary Beneficiary | Other limited partnership interests
Variable Interest Entity [Line Items]
Total Assets	13,285	13,529
Maximum Exposure to Loss	17,572	17,991
Variable Interest Entity, Not Primary Beneficiary | Other Investments
Variable Interest Entity [Line Items]
Total Assets	1,645	1,660
Maximum Exposure to Loss	1,685	1,701
Variable Interest Entity, Not Primary Beneficiary | Other invested assets
Variable Interest Entity [Line Items]
Total Assets	1,028	1,085
Maximum Exposure to Loss	$ 1,178	$ 1,242