Investments - Schedule of Changes in Allowance for Expected Credit Losses on Mortgage Loans (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Financing Receivable, Allowance for Credit Loss | ||||
| Beginning Balance | $ (108) | $ (75) | $ (86) | $ (70) |
| Provision (expense) benefit for loan losses | (12) | (2) | (34) | (7) |
| Ending Balance | (120) | (77) | (120) | (77) |
| Residential Mortgages | ||||
| Financing Receivable, Allowance for Credit Loss | ||||
| Beginning Balance | (81) | (58) | (68) | (53) |
| Provision (expense) benefit for loan losses | (9) | 0 | (22) | (5) |
| Ending Balance | (90) | (58) | (90) | (58) |
| Commercial Mortgages | ||||
| Financing Receivable, Allowance for Credit Loss | ||||
| Beginning Balance | (27) | (17) | (18) | (17) |
| Provision (expense) benefit for loan losses | (3) | (2) | (12) | (2) |
| Ending Balance | $ (30) | $ (19) | $ (30) | $ (19) |