Variable Interest Entities (Narrative) (Details) - USD ($)	Jun. 30, 2025	Dec. 31, 2024
Variable Interest Entity [Line Items]
Total liabilities	$ 241,527,389,000	$ 233,752,749,000
Unconsolidated VIEs
Variable Interest Entity [Line Items]
Total liabilities	0
Other invested assets | Unconsolidated VIEs
Variable Interest Entity [Line Items]
Maximum exposure to loss on these investments	$ 78,000,000	$ 0