Separate Accounts - Schedule of Fair Value of Separate Account Assets (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Fair Value, Separate Account Investment [Line Items]
Separate account assets	$ 179,860	$ 168,438
Equity funds: | Domestic
Fair Value, Separate Account Investment [Line Items]
Separate account assets	84,324	77,740
Equity funds: | International
Fair Value, Separate Account Investment [Line Items]
Separate account assets	17,986	16,282
Equity funds: | Other equity funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,498	1,403
Balanced funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	46,769	45,683
Bond funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	24,046	23,399
Money market funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,053	1,931
Other funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,474	1,321
Exchange-traded funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	330	336
Fixed maturity AFS securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	168	161
Cash and invested cash
Fair Value, Separate Account Investment [Line Items]
Separate account assets	6	12
Other investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	$ 1,206	$ 170