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Separate Accounts - Schedule of Fair Value of Separate Account Assets (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Fair Value, Separate Account Investment [Line Items]
Separate account assets	$ 165,199	$ 158,257
Mutual funds and collective investment trusts
Fair Value, Separate Account Investment [Line Items]
Separate account assets	164,537	157,578
Exchange-traded funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	345	350
Fixed maturity AFS securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	162	167
Cash and invested cash
Fair Value, Separate Account Investment [Line Items]
Separate account assets	4	25
Other investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	$ 151	$ 137

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Amount of asset at fair value held for benefit of separate account policyholder.

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