Investments - Schedule of Changes in Allowance for Expected Credit Losses on Mortgage Loans (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Financing Receivable, Allowance for Credit Loss | ||
| Beginning Balance | $ (86) | $ (70) |
| Provision (expense) benefit for loan losses | (11) | (3) |
| Ending Balance | (97) | (73) |
| Residential Mortgage | ||
| Financing Receivable, Allowance for Credit Loss | ||
| Beginning Balance | (68) | (53) |
| Provision (expense) benefit for loan losses | (6) | (3) |
| Ending Balance | (74) | (56) |
| Commercial Mortgage | ||
| Financing Receivable, Allowance for Credit Loss | ||
| Beginning Balance | (18) | (17) |
| Provision (expense) benefit for loan losses | (5) | 0 |
| Ending Balance | $ (23) | $ (17) |