Investments (Unconsolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Variable Interest Entity [Line Items]
Total Assets	$ 674,266	$ 663,072
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	67,702	66,921
Maximum Exposure to Loss	73,989	72,663
Variable Interest Entity, Not Primary Beneficiary | Fixed Maturity Securities
Variable Interest Entity [Line Items]
Total Assets	51,998	51,422
Maximum Exposure to Loss	51,998	51,422
Variable Interest Entity, Not Primary Beneficiary | Other limited partnership interests
Variable Interest Entity [Line Items]
Total Assets	13,463	13,244
Maximum Exposure to Loss	19,678	18,906
Variable Interest Entity, Not Primary Beneficiary | Other invested assets
Variable Interest Entity [Line Items]
Total Assets	1,285	1,310
Maximum Exposure to Loss	1,355	1,387
Variable Interest Entity, Not Primary Beneficiary | Other Investments
Variable Interest Entity [Line Items]
Total Assets	956	945
Maximum Exposure to Loss	$ 958	$ 948