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, 2024 |
Sep. 30, 2023 |
Sep. 30, 2024 |
Sep. 30, 2023 |
|
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | ||||
| Beginning Balance | $ (64) | $ (64) | $ (66) | $ (42) |
| Provision (expense) benefit for loan losses | (5) | 0 | (3) | (22) |
| Ending Balance | (69) | (64) | (69) | (64) |
| Residential Mortgage Loans | ||||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | ||||
| Beginning Balance | (50) | (51) | (54) | (32) |
| Provision (expense) benefit for loan losses | (1) | 2 | 3 | (17) |
| Ending Balance | (51) | (49) | (51) | (49) |
| Commercial Mortgage Loans | ||||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | ||||
| Beginning Balance | (14) | (13) | (12) | (10) |
| Provision (expense) benefit for loan losses | (4) | (2) | (6) | (5) |
| Ending Balance | $ (18) | $ (15) | $ (18) | $ (15) |