Investments (Fixed Maturity Securities Pledged And Received As Collateral) (Details) - USD ($) $ in Millions	Dec. 31, 2024		Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Available for Sale at Fair value - Amortized cost	$ 82,907		$ 64,977
Fixed maturity securities available-for-sale at fair value (amortized cost of $82,907 and $64,977; allowance for credit losses of $98 and $75)	77,617	[1]	60,467	[2]
Estimate of Fair Value Measurement [Member]
Debt Securities, Available-for-sale [Line Items]
Assets Held-in-trust	44,473		30,359
Carrying Value [Member]
Debt Securities, Available-for-sale [Line Items]
Assets Held-in-trust	47,162		32,758
Collateral Fixed Maturity Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available for Sale at Fair value - Amortized cost	1,200		572
Fixed maturity securities available-for-sale at fair value (amortized cost of $82,907 and $64,977; allowance for credit losses of $98 and $75)	1,046		517
Collateral Received Fixed Maturity Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities available-for-sale at fair value (amortized cost of $82,907 and $64,977; allowance for credit losses of $98 and $75)	$ 2,233		$ 1,827

[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 December 31, 2024, the fair value of such investments was $966 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.