Allowance for Expected Credit Losses (Details) - Changes in the Allowance for Expected Credit Losses on Contractholder Receivables (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Credit Loss [Abstract] | ||||
| Contractholder receivables (net of the allowance for expected credit losses), balance, beginning of period | $ 3,076 | $ 3,095 | $ 3,010 | $ 3,171 |
| Contractholder receivables (net of the allowance for expected credit losses), balance, end of period | 3,041 | 3,098 | 3,041 | 3,098 |
| Contractholder receivables, allowance for expected credit losses [Roll Forward] | ||||
| Contractholder receivables, allowance for expected credit losses, beginning balance | 13 | 17 | 16 | 18 |
| Current period change for expected credit losses | 0 | 0 | (3) | (1) |
| Write-offs of uncollectible contractholder receivables | 0 | 0 | 0 | 0 |
| Contractholder receivables, allowance for expected credit losses, ending balance | $ 13 | $ 17 | $ 13 | $ 17 |