Variable Interest Entities (Narrative) (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Variable Interest Entity [Line Items]
Total liabilities	$ 654,307,000,000	$ 657,481,000,000
Unconsolidated VIEs
Variable Interest Entity [Line Items]
Total liabilities	0
Fixed maturities, available-for-sale, Fixed maturities, trading, Equity securities and Other invested assets | Unconsolidated VIEs
Variable Interest Entity [Line Items]
Maximum exposure to loss on these investments	844,000,000	950,000,000
Other invested assets | Unconsolidated VIEs
Variable Interest Entity [Line Items]
Maximum exposure to loss on these investments	$ 17,978,000,000	$ 16,917,000,000