Investments (Realized Investment Gains Losses, Net) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023		Dec. 31, 2022
Schedule of Gain (Loss) on Investments [Line Items]
Realized investment gains (losses), net	$ 451,417	$ (1,147,099)	[1]	$ 289,929	[1]
Fixed maturities
Schedule of Gain (Loss) on Investments [Line Items]
Realized investment gains (losses), net	(167,394)	(31,193)		(74,005)
Commercial mortgage and other loans
Schedule of Gain (Loss) on Investments [Line Items]
Realized investment gains (losses), net	(11,113)	(17,854)		(18,201)
LPs/LLCs
Schedule of Gain (Loss) on Investments [Line Items]
Realized investment gains (losses), net	576	(272)		(11,351)
Derivatives
Schedule of Gain (Loss) on Investments [Line Items]
Realized investment gains (losses), net	713,403	(1,136,331)		460,859
Short-term investments and cash equivalents
Schedule of Gain (Loss) on Investments [Line Items]
Realized investment gains (losses), net	974	2,033		(54)
Other
Schedule of Gain (Loss) on Investments [Line Items]
Realized investment gains (losses), net	$ (85,029)	$ 36,518		$ (67,319)

[1] Amounts reflect revision to prior period Financial Statements. See Note 17 for additional information.