Investments (Fixed Maturity Proceeds) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Debt Securities [Line Items]
Proceeds from maturities/prepayments			$ 20,299	$ 24,901
Available for sale Securities Netting
Debt Securities [Line Items]
Non cash Or Part Non cash Divestitures Amount Of Consideration Received			183	(253)
Fixed maturities \| Available-for-sale
Debt Securities [Line Items]
Proceeds from sales	$ 4,191	$ 8,323	9,103	14,074
Proceeds from maturities/prepayments	5,252	6,147	11,013	11,080
Gross investment gains from sales and maturities	126	201	408	595
Gross investment losses from sales and maturities	(233)	(910)	(540)	(1,270)
Write-downs recognized in earnings	(57)	(4)	(176)	(9)
(Addition to) release of allowance for credit losses	$ 27	$ (22)	$ 107	$ (33)

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