Investments - Rollforward of Changes in Allowance for Credit Losses on Available for Sale Fixed Maturity Securities by Major Investment Category (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	$ 28	$ 28	$ 34	$ 37
Securities for which allowance for credit losses were not previously recorded	6	24	10	30
Securities sold during the period	(1)	(3)	0	(5)
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	12	6	9	(6)
Write-offs charged against the allowance	(14)	(21)	(22)	(21)
Other	2	0	2	(1)
Balance, end of period	33	34	33	34
Structured
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	3	16	13	20
Securities for which allowance for credit losses were not previously recorded	1	1	1	2
Securities sold during the period	0	(2)	0	(2)
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	2	1	(8)	(3)
Write-offs charged against the allowance	0	(10)	0	(10)
Other	0	1	0	0
Balance, end of period	6	7	6	7
Non- Structured
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	25	12	21	17
Securities for which allowance for credit losses were not previously recorded	5	23	9	28
Securities sold during the period	(1)	(1)	0	(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	10	5	17	(3)
Write-offs charged against the allowance	(14)	(11)	(22)	(11)
Other	2	(1)	2	(1)
Balance, end of period	$ 27	$ 27	$ 27	$ 27