Investments (Amortized Cost and Fair Value of Fixed Maturities by Contractual Maturities) (Details) - USD ($) $ in Millions	Jun. 30, 2024		Dec. 31, 2023
Available For Sale Securities Debt Maturities Amortized Cost
Due in one year or less	$ 1,347
Due after one year through five years	11,719
Due after five year through ten years	12,784
Due after ten years	41,460
Asset and mortgage-backed securities	8,851
Total	76,161		$ 64,977
Available For Sale Securities Debt Maturities Fair Value
Due in one year or less	1,351
Due after one year through five years	11,557
Due after five year through ten years	12,221
Due after ten years	36,887
Asset and mortgage-backed securities	8,475
Total	$ 70,491	[1]	$ 60,467	[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 June 30, 2024, the fair value of such investments was $911 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, 2023, the fair value of such investments was $856 million