Separate Account Assets and Liabilities - Separate Account Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022		Dec. 31, 2021
Fair Value, Separate Account Asset
Separate account assets	$ 77,457	$ 73,962	[1]
Gain (loss) recognized on assets transferred to separate account	0	0		$ 0
Mutual funds
Fair Value, Separate Account Asset
Separate account assets	74,634	70,876
Property/real estate
Fair Value, Separate Account Asset
Separate account assets	1,784	1,876
Equity securities
Fair Value, Separate Account Asset
Separate account assets	553	679
Debt securities
Fair Value, Separate Account Asset
Separate account assets	285	279
Cash and cash equivalents
Fair Value, Separate Account Asset
Separate account assets	147	208
Other
Fair Value, Separate Account Asset
Separate account assets	$ 54	$ 44

[1] Certain prior period amounts have been restated. See Note 3 for more information.