Investments (Amortized Cost and Fair Value of Fixed Maturities by Contractual Maturities) (Details) - USD ($) $ in Millions	Mar. 31, 2025		Dec. 31, 2024
Available For Sale Securities Debt Maturities Amortized Cost
Due in one year or less	$ 2,112
Due after one year through five years	12,720
Due after five year through ten years	14,833
Due after ten years	50,473
Asset and mortgage-backed securities	9,571
Total	89,709		$ 82,907
Available For Sale Securities Debt Maturities Fair Value
Due in one year or less	2,128
Due after one year through five years	12,694
Due after five year through ten years	14,610
Due after ten years	45,786
Asset and mortgage-backed securities	9,289
Total	$ 84,507	[1]	$ 77,617	[2]

[1] Excludes limited partnerships that are measured at estimated fair value using the NAV per share (or its equivalent) as a practical expedient. As of March 31, 2025, the fair value of such investments was $963 million.

[2] Excludes limited partnerships that are measured at estimated fair value using the NAV per share (or its equivalent) as a practical expedient. As of December 31, 2024, the fair value of such investments was $966 million