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 |