Investments (Unconsolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Total Assets	$ 666,611	$ 759,708
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	66,921	77,974
Maximum Exposure to Loss	72,663	85,614
Variable Interest Entity, Not Primary Beneficiary | Fixed Maturity Securities
Variable Interest Entity [Line Items]
Total Assets	51,422	62,654
Maximum Exposure to Loss	51,422	62,654
Variable Interest Entity, Not Primary Beneficiary | Other limited partnership interests
Variable Interest Entity [Line Items]
Total Assets	13,244	13,287
Maximum Exposure to Loss	18,906	20,720
Variable Interest Entity, Not Primary Beneficiary | Other invested assets
Variable Interest Entity [Line Items]
Total Assets	1,310	1,257
Maximum Exposure to Loss	1,387	1,314
Variable Interest Entity, Not Primary Beneficiary | Other Investments
Variable Interest Entity [Line Items]
Total Assets	945	776
Maximum Exposure to Loss	$ 948	$ 926