Investments - Rollforward of Changes in Allowance for Credit Losses on Available for Sale Fixed Maturity Securities by Major Investment Category (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	$ 38	$ 34	$ 37
Securities for which allowance for credit losses was not previously recorded	28	15	52
Securities sold during the period	(12)	(6)	(12)
Addition to (release of) the allowance for credit losses on securities that had an allowance recorded in a previous period, for which there was no intent to sell before recovery of amortized cost basis	4	10	(8)
Write-offs charged against the allowance	(20)	(24)	(37)
Other	(1)	9	2
Balance, end of year	37	38	34
Structured
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	10	13	20
Securities for which allowance for credit losses was not previously recorded	1	5	6
Securities sold during the period	0	(4)	(3)
Addition to (release of) the allowance for credit losses on securities that had an allowance recorded in a previous period, for which there was no intent to sell before recovery of amortized cost basis	(1)	(3)	(1)
Write-offs charged against the allowance	(5)	0	(11)
Other	0	(1)	2
Balance, end of year	5	10	13
Non- Structured
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	28	21	17
Securities for which allowance for credit losses was not previously recorded	27	10	46
Securities sold during the period	(12)	(2)	(9)
Addition to (release of) the allowance for credit losses on securities that had an allowance recorded in a previous period, for which there was no intent to sell before recovery of amortized cost basis	5	13	(7)
Write-offs charged against the allowance	(15)	(24)	(26)
Other	(1)	10	0
Balance, end of year	$ 32	$ 28	$ 21