Investments - Allowance for Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Accrued interest receivables on available-for-sale fixed maturity securities	$ 401	$ 387	$ 401	$ 387	$ 369
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	5	45	18	40
Securities for which credit losses were not previously recorded				14
Available-for-sale securities accounted for as PCD assets	0	2	3	8
Securities sold during the period (realized)				6
Write-offs charged against the allowance	0	16	12	16
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period	(2)		(6)	(9)
Ending balance	3	31	3	31
Corporate and Other Bonds
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	0	24	11	23
Securities for which credit losses were not previously recorded				14
Available-for-sale securities accounted for as PCD assets		2		4
Securities sold during the period (realized)				6
Write-offs charged against the allowance		16	12	16
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period			1	(9)
Ending balance	0	10	0	10
Asset-backed
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	5	21	7	17
Securities for which credit losses were not previously recorded
Available-for-sale securities accounted for as PCD assets			3	4
Securities sold during the period (realized)
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	(2)		(7)
Ending balance	$ 3	$ 21	$ 3	$ 21