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, 2026 |
Mar. 31, 2025 |
|
| Credit Loss [Abstract] | ||
| Contractholder receivables (net of the allowance for expected credit losses), balance, beginning of period | $ 3,010 | $ 3,171 |
| Contractholder receivables (net of the allowance for expected credit losses), balance, end of period | 3,051 | 3,193 |
| Contractholder receivables, allowance for expected credit losses [Roll Forward] | ||
| Contractholder receivables, allowance for expected credit losses, beginning balance | 16 | 18 |
| Current period change for expected credit losses | (2) | (1) |
| Write-offs of uncollectible contractholder receivables | 0 | 0 |
| Contractholder receivables, allowance for expected credit losses, ending balance | $ 14 | $ 17 |