Investments (excluding Consolidated Investment Entities) - Net Investment Income (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Net Investment Income [Line Items]
Gross investment income	$ 590	$ 582
Less: Investment expenses	21	22
Net investment income	569	560
Fixed maturities
Net Investment Income [Line Items]
Gross investment income	467	465
Equity securities
Net Investment Income [Line Items]
Gross investment income	2	3
Mortgage loans on real estate
Net Investment Income [Line Items]
Gross investment income	69	67
Policy loans
Net Investment Income [Line Items]
Gross investment income	5	5
Short-term investments and cash equivalents
Net Investment Income [Line Items]
Gross investment income	9	10
Limited partnerships and other
Net Investment Income [Line Items]
Gross investment income	$ 38	$ 32

Amount, before investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.

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Amount of expenses related to the generation of investment income.

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