Investments (Fixed Maturity Proceeds) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Debt Securities [Line Items]
Proceeds from maturities/prepayments	$ 15,183	$ 10,959
Available for sale Securities Netting
Debt Securities [Line Items]
Non cash Or Part Non cash Divestitures Amount Of Consideration Received	(92)	286
Fixed maturities \| Available-for-sale
Debt Securities [Line Items]
Proceeds from sales	8,481	4,912
Proceeds from maturities/prepayments	6,794	5,761
Gross investment gains from sales and maturities	359	282
Gross investment losses from sales and maturities	(872)	(307)
Write-downs recognized in earnings	(165)	(119)
(Addition to) release of allowance for credit losses	$ (66)	$ 80

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