Separate Account Assets and Liabilities - Aggregate Fair Value of Assets, by Major Investment Asset Category (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Fair Value, Separate Account Investment [Line Items]
Separate account assets	$ 212,719	$ 195,906	[1]
Equity
Fair Value, Separate Account Investment [Line Items]
Separate account assets	147,040	132,547
Bond
Fair Value, Separate Account Investment [Line Items]
Separate account assets	19,503	19,155
Balanced
Fair Value, Separate Account Investment [Line Items]
Separate account assets	42,953	40,797
Money Market
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,832	3,051
Total Variable Annuities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	212,328	195,550
Other Product Lines
Fair Value, Separate Account Investment [Line Items]
Separate account assets	$ 391	$ 356

[1] (1) Recast for the adoption of ASU 2018-12. See Notes 1 and 2 to the Condensed Consolidated Financial Statements.