Allowance for Expected Credit Losses (Details) - Changes in the Allowance for Expected Credit Losses on Contractholder Receivables (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Credit Loss [Abstract]
Contractholder receivables (net of the allowance for expected credit losses), balance, beginning of period	$ 3,249	$ 3,579
Contractholder receivables (net of the allowance for expected credit losses), balance, end of period	3,266	3,598
Contractholder receivables, allowance for expected credit losses [Roll Forward]
Contractholder receivables, allowance for expected credit losses, beginning balance	20	17
Current period change for expected credit losses	(1)	2
Write-offs of uncollectible contractholder receivables	0	0
Contractholder receivables, allowance for expected credit losses, ending balance	$ 19	$ 19