Variable Interest Entities (Narrative) (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Total liabilities	$ 862,777,000,000	$ 872,512,000,000
Fixed maturities, available-for-sale, Fixed maturities, trading, Equity securities and Other invested assets
Variable Interest Entity [Line Items]
Maximum exposure to loss on these investments	954,000,000	935,000,000
LPs/LLCs | Other invested assets
Variable Interest Entity [Line Items]
Maximum exposure to loss on these investments	14,672,000,000	$ 12,883,000,000
Unconsolidated VIEs
Variable Interest Entity [Line Items]
Total liabilities	$ 0