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Investments (Fixed Maturity Securities Pledged And Received As Collateral) (Details) - USD ($)
$ in Millions

Mar. 31, 2025

Dec. 31, 2024

Debt Securities, Available-for-sale [Line Items]

Available for Sale at Fair value - Amortized cost

$ 89,709

$ 82,907

Fixed maturity securities, available-for-sale

84,507

^[1]

77,617

^[2]

Collateral Fixed Maturity Securities [Member]

Debt Securities, Available-for-sale [Line Items]

Available for Sale at Fair value - Amortized cost

1,307

1,200

Fixed maturity securities, available-for-sale

1,095

1,046

Collateral Received Fixed Maturity Securities [Member]

Debt Securities, Available-for-sale [Line Items]

Fixed maturity securities, available-for-sale

2,319

2,233

Reported Value Measurement [Member]

Debt Securities, Available-for-sale [Line Items]

Assets Held-in-trust

54,053

47,162

Estimate of Fair Value Measurement [Member]

Debt Securities, Available-for-sale [Line Items]

Assets Held-in-trust

51,343

44,473

Deposits

Debt Securities, Available-for-sale [Line Items]

Available for Sale at Fair value - Amortized cost

10

10

Fixed maturity securities, available-for-sale

9

8

Federal Home Loan Bank Certificates and Obligations (FHLB)

Debt Securities, Available-for-sale [Line Items]

Available for Sale at Fair value - Amortized cost

71

71

Fixed maturity securities, available-for-sale

$ 71

$ 71

[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

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