Investments - Net Investment Income (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Net Investment Income [Line Items]
Other investments	$ (30)	$ (33)	$ 79
Gross Investment Income, Operating, Net	5,841	6,203	5,723
Investment expense	(316)	(324)	(208)
Net Investment Income, Total	5,525	5,879	5,515
Fixed maturity AFS securities
Net Investment Income [Line Items]
Gross investment income	4,222	4,819	4,469
Trading securities
Net Investment Income [Line Items]
Gross investment income	118	161	182
Equity securities
Net Investment Income [Line Items]
Gross investment income	21	13	11
Mortgage loans on real estate
Net Investment Income [Line Items]
Gross investment income	887	755	689
Policy loans
Net Investment Income [Line Items]
Gross investment income	95	103	101
Cash and invested cash
Net Investment Income [Line Items]
Gross investment income	194	129	13
Commercial mortgage loan prepayment and bond makewhole premiums
Net Investment Income [Line Items]
Gross investment income	15	10	105
Alternative investments
Net Investment Income [Line Items]
Gross investment income	319	243	66
Consent fees
Net Investment Income [Line Items]
Gross investment income	$ 0	$ 3	$ 8

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Gross Investment Income, Operating, Net

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