Investments (excluding Consolidated Investment Entities) - Net Investment Income (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Net Investment Income [Line Items]
Gross investment income	$ (561)	$ (606)	$ (1,151)	$ (1,188)
Less: Investment expenses	24	22	45	44
Net investment income	537	584	1,106	1,144
Fixed maturities
Net Investment Income [Line Items]
Gross investment income	(476)	(462)	(943)	(927)
Equity securities
Net Investment Income [Line Items]
Gross investment income	(8)	(5)	(10)	(8)
Mortgage loans on real estate
Net Investment Income [Line Items]
Gross investment income	(71)	(69)	(140)	(136)
Policy loans
Net Investment Income [Line Items]
Gross investment income	(4)	(5)	(9)	(10)
Short-term investments and cash equivalents
Net Investment Income [Line Items]
Gross investment income	(7)	(10)	(16)	(20)
Limited partnerships and other
Net Investment Income [Line Items]
Gross investment income	$ (5)	$ (55)	$ (33)	$ (87)

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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