Allowance for Expected Credit Losses (Details) - Changes in the Allowance for Expected Credit Losses on Contractholder Receivables (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Credit Loss [Abstract]
Contractholder receivables (net of the allowance for expected credit losses), balance, beginning of period	$ 3,598	$ 3,901	$ 3,579	$ 3,890
Contractholder receivables (net of the allowance for expected credit losses), balance, end of period	3,449	3,735	3,449	3,735
Contractholder receivables, allowance for expected credit losses [Roll Forward]
Contractholder receivables, allowance for expected credit losses, beginning balance	19	19	17	21
Current period change for expected credit losses	1	0	3	(2)
Write-offs of uncollectible contractholder receivables	0	1	0	1
Contractholder receivables, allowance for expected credit losses, ending balance	$ 20	$ 18	$ 20	$ 18