Investments (excluding Consolidated Investment Entities) - Net Investment Income (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	$ 2,407	$ 2,150	$ 2,230
Less: Investment expenses	89	76	71
Net investment income	2,318	2,074	2,159
Fixed maturities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	1,855	1,678	1,766
Equity securities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	17	19	21
Mortgage loans on real estate
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	274	234	249
Policy loans
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	19	20	20
Short-term investments and cash equivalents
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	40	40	39
Other
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	$ 202	$ 159	$ 135

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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