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
	Mar. 31, 2024	Mar. 31, 2023
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	$ 162	$ 186
Securities for which allowance for credit losses were not previously recorded	33	24
Securities sold during the period	(23)	(11)
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	35	(8)
Write-offs charged against the allowance	(83)	(50)
Other	1	(5)
Balance, end of period	125	136
Structured
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	69	46
Securities for which allowance for credit losses were not previously recorded	13	2
Securities sold during the period	(15)	(1)
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	(4)
Write-offs charged against the allowance	(39)	0
Other	1	2
Balance, end of period	41	45
Non- Structured
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	93	140
Securities for which allowance for credit losses were not previously recorded	20	22
Securities sold during the period	(8)	(10)
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	23	(4)
Write-offs charged against the allowance	(44)	(50)
Other	0	(7)
Balance, end of period	$ 84	$ 91