Investments (excluding Consolidated Investment Entities) - Allowance for Losses for Commercial Mortgage Loans (Details) - USD ($) $ in Millions |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2025 |
Dec. 31, 2024 |
|
| Allowance for Loan and Lease Losses [Roll Forward] | ||
| Beginning Balance | $ 24 | |
| Ending Balance | 19 | $ 24 |
| Commercial Portfolio Segment | ||
| Allowance for Loan and Lease Losses [Roll Forward] | ||
| Beginning Balance | 24 | 26 |
| Credit losses on mortgage loans for which credit losses were not previously recorded | 6 | 1 |
| Increase (decrease) on mortgage loans with an allowance recorded in a previous period | 0 | 0 |
| Provision for expected credit losses | 30 | 27 |
| Write-offs | (11) | (3) |
| Ending Balance | $ 19 | $ 24 |