Investments (Rollforward of the Allowance for Credit Losses for Fixed Maturity Securities by Sector) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Fixed maturity securities, allowance for credit losses, beginning of year	$ 79	$ 21
Allowance on securities where credit losses were not previously recorded	4	56
Reductions for securities sold	(5)	0
Change in allowance on securities with an allowance recorded in a previous period	11	2
Write-offs charged against allowance	(27)	0
Fixed maturity securities, allowance for credit losses, end of year	62	79
U.S. corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Fixed maturity securities, allowance for credit losses, beginning of year	47	15
Allowance on securities where credit losses were not previously recorded	4	29
Reductions for securities sold	(4)	0
Change in allowance on securities with an allowance recorded in a previous period	7	3
Write-offs charged against allowance	(27)	0
Fixed maturity securities, allowance for credit losses, end of year	27	47
Foreign corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Fixed maturity securities, allowance for credit losses, beginning of year	26	0
Allowance on securities where credit losses were not previously recorded	0	26
Reductions for securities sold	0	0
Change in allowance on securities with an allowance recorded in a previous period	5	0
Write-offs charged against allowance	0	0
Fixed maturity securities, allowance for credit losses, end of year	31	26
RMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Fixed maturity securities, allowance for credit losses, beginning of year	4	4
Allowance on securities where credit losses were not previously recorded	0	1
Reductions for securities sold	0	0
Change in allowance on securities with an allowance recorded in a previous period	(1)	(1)
Write-offs charged against allowance	0	0
Fixed maturity securities, allowance for credit losses, end of year	3	4
CMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Fixed maturity securities, allowance for credit losses, beginning of year	2	2
Allowance on securities where credit losses were not previously recorded	0	0
Reductions for securities sold	(1)	0
Change in allowance on securities with an allowance recorded in a previous period	0
Write-offs charged against allowance	0	0
Fixed maturity securities, allowance for credit losses, end of year	$ 1	$ 2