Investments - Allowance for Credit Losses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Accrued interest receivables on available-for-sale fixed maturity securities	$ 394	$ 369
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Receivables	Receivables
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 18	$ 40
Securities for which credit losses were not previously recorded	0	14
Available-for-sale securities accounted for as PCD assets	3	11
Securities sold during the period (realized)	0	24
Write-offs charged against the allowance	12	16
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period	(8)	(7)
Ending balance	1	18
Corporate bonds and other
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Beginning balance	11	23
Securities for which credit losses were not previously recorded		14
Available-for-sale securities accounted for as PCD assets		5
Securities sold during the period (realized)		7
Write-offs charged against the allowance	12	16
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period	1	(8)
Ending balance	0	11
Asset-backed
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Beginning balance	7	17
Securities for which credit losses were not previously recorded
Available-for-sale securities accounted for as PCD assets	3	6
Securities sold during the period (realized)		17
Write-offs charged against the allowance
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period	(9)	1
Ending balance	$ 1	$ 7