Investments (Unconsolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Variable Interest Entity [Line Items]
Total Assets	$ 702,470	$ 677,457
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	83,966	76,660
Maximum Exposure to Loss	88,709	81,320
Variable Interest Entity, Not Primary Beneficiary | Fixed Maturity Securities
Variable Interest Entity [Line Items]
Total Assets	67,298	60,386
Maximum Exposure to Loss	67,298	60,386
Variable Interest Entity, Not Primary Beneficiary | Other limited partnership interests
Variable Interest Entity [Line Items]
Total Assets	13,413	13,529
Maximum Exposure to Loss	17,947	17,991
Variable Interest Entity, Not Primary Beneficiary | Other Investments
Variable Interest Entity [Line Items]
Total Assets	2,189	1,660
Maximum Exposure to Loss	2,254	1,701
Variable Interest Entity, Not Primary Beneficiary | Other invested assets
Variable Interest Entity [Line Items]
Total Assets	1,066	1,085
Maximum Exposure to Loss	$ 1,210	$ 1,242