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INVESTMENTS - Commercial Mortgage and Other Loans by Portfolio Segment (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Jun. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | --- | --- | --- | --- | ---
Participating Mortgage Loans [Line Items] |  |  |  |  |  |
Commercial mortgage and other loans, gross | $ 10,559 |  | $ 11,224 |  |  |
Percent of total commercial mortgage and other loans | 100.00% |  | 100.00% |  |  |
Allowance for credit losses | $ (422) |  | $ (355) |  |  |
Total net commercial mortgage and other loans | 10,137 |  | 10,869 |  |  |
Transitional real estate loans |  |  |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |  |  |
Commercial mortgage and other loans, gross | $ 4,317 |  | $ 4,902 |  |  |
Percent of total commercial mortgage and other loans | 41.00% |  | 43.70% |  |  |
Allowance for credit losses | $ (271) | $ (243) | $ (199) | $ (151) | $ (123) | $ (112)
Commercial mortgage loans |  |  |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |  |  |
Commercial mortgage and other loans, gross | $ 1,442 |  | $ 1,537 |  |  |
Percent of total commercial mortgage and other loans | 13.60% |  | 13.70% |  |  |
Allowance for credit losses | $ (10) | (12) | $ (14) | (30) | (17) | (16)
Middle market loans |  |  |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |  |  |
Commercial mortgage and other loans, gross | $ 4,387 |  | $ 4,423 |  |  |
Percent of total commercial mortgage and other loans | 41.50% |  | 39.40% |  |  |
Allowance for credit losses | $ (139) | $ (127) | $ (140) | $ (103) | $ (98) | $ (146)
Other loans |  |  |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |  |  |
Commercial mortgage and other loans, gross | $ 413 |  | $ 362 |  |  |
Percent of total commercial mortgage and other loans | 3.90% |  | 3.20% |  |  |
Office | Transitional real estate loans |  |  |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |  |  |
Commercial mortgage and other loans, gross | $ 1,226 |  | $ 1,361 |  |  |
Percent of total commercial mortgage and other loans | 11.60% |  | 12.10% |  |  |
Office | Commercial mortgage loans |  |  |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |  |  |
Commercial mortgage and other loans, gross | $ 266 |  | $ 300 |  |  |
Percent of total commercial mortgage and other loans | 2.50% |  | 2.70% |  |  |
Retail | Transitional real estate loans |  |  |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |  |  |
Commercial mortgage and other loans, gross | $ 314 |  | $ 349 |  |  |
Percent of total commercial mortgage and other loans | 3.00% |  | 3.10% |  |  |
Retail | Commercial mortgage loans |  |  |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |  |  |
Commercial mortgage and other loans, gross | $ 208 |  | $ 214 |  |  |
Percent of total commercial mortgage and other loans | 2.00% |  | 1.90% |  |  |
Apartment/Multi-Family | Transitional real estate loans |  |  |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |  |  |
Commercial mortgage and other loans, gross | $ 1,861 |  | $ 2,201 |  |  |
Percent of total commercial mortgage and other loans | 17.60% |  | 19.60% |  |  |
Apartment/Multi-Family | Commercial mortgage loans |  |  |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |  |  |
Commercial mortgage and other loans, gross | $ 544 |  | $ 572 |  |  |
Percent of total commercial mortgage and other loans | 5.10% |  | 5.10% |  |  |
Industrial | Transitional real estate loans |  |  |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |  |  |
Commercial mortgage and other loans, gross | $ 101 |  | $ 117 |  |  |
Percent of total commercial mortgage and other loans | 1.00% |  | 1.10% |  |  |
Industrial | Commercial mortgage loans |  |  |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |  |  |
Commercial mortgage and other loans, gross | $ 410 |  | $ 436 |  |  |
Percent of total commercial mortgage and other loans | 3.90% |  | 3.90% |  |  |
Hospitality | Transitional real estate loans |  |  |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |  |  |
Commercial mortgage and other loans, gross | $ 523 |  | $ 556 |  |  |
Percent of total commercial mortgage and other loans | 5.00% |  | 5.00% |  |  |
Other | Transitional real estate loans |  |  |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |  |  |
Commercial mortgage and other loans, gross | $ 292 |  | $ 318 |  |  |
Percent of total commercial mortgage and other loans | 2.80% |  | 2.80% |  |  |
Other | Commercial mortgage loans |  |  |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |  |  |
Commercial mortgage and other loans, gross | $ 14 |  | $ 15 |  |  |
Percent of total commercial mortgage and other loans | 0.10% |  | 0.10% |  |  |

X
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