Allowance for Expected Credit Losses (Details) - Changes in the Allowance for Expected Credit Losses on Contractholder Receivables - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 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	3,171	3,249
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	(2)	3
Write-offs of uncollectible contractholder receivables	0	0
Contractholder receivables, allowance for expected credit losses, ending balance	$ 18	$ 20