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, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	$ 136	$ 191	$ 186	$ 98
Securities for which allowance for credit losses were not previously recorded	56	30	80	207
Securities sold during the period	(18)	(41)	(29)	(42)
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	18	(6)	(66)
Write-offs charged against the allowance	(47)	(22)	(97)	(22)
Other	(4)	(1)	(9)	0
Balance, end of period	125	175	125	175
Structured
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	45	15	46	8
Securities for which allowance for credit losses were not previously recorded	16	2	18	51
Securities sold during the period	(2)	(1)	(3)	(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	0	10	(4)	(32)
Write-offs charged against the allowance	(10)	0	(10)	0
Other	(2)	0	0	0
Balance, end of period	47	26	47	26
Non- Structured
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	91	176	140	90
Securities for which allowance for credit losses were not previously recorded	40	28	62	156
Securities sold during the period	(16)	(40)	(26)	(41)
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	8	(2)	(34)
Write-offs charged against the allowance	(37)	(22)	(87)	(22)
Other	(2)	(1)	(9)	0
Balance, end of period	$ 78	$ 149	$ 78	$ 149