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INVESTMENTS - Commercial Mortgage and Other Loans by Portfolio Segment (Detail) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
Participating Mortgage Loans [Line Items] |  |  |  |
Total | $ 11,224 | $ 12,801 |  |
Percent of total commercial mortgage and other loans | 100.00% | 100.00% |  |
Allowance for credit losses | $ (355) | $ (274) |  |
Total net commercial mortgage and other loans | 10,869 | 12,527 |  |
Transitional real estate loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Total | $ 4,902 | $ 6,114 |  |
Percent of total commercial mortgage and other loans | 43.70% | 47.80% |  |
Allowance for credit losses | $ (199) | $ (112) | $ (54) | $ (68)
Transitional real estate loans | Office |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Total | $ 1,361 | $ 1,807 |  |
Percent of total commercial mortgage and other loans | 12.10% | 14.10% |  |
Transitional real estate loans | Retail |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Total | $ 349 | $ 473 |  |
Percent of total commercial mortgage and other loans | 3.10% | 3.70% |  |
Transitional real estate loans | Apartments/Multi-Family |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Total | $ 2,201 | $ 2,608 |  |
Percent of total commercial mortgage and other loans | 19.60% | 20.40% |  |
Transitional real estate loans | Industrial |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Total | $ 117 | $ 157 |  |
Percent of total commercial mortgage and other loans | 1.10% | 1.20% |  |
Transitional real estate loans | Hospitality |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Total | $ 556 | $ 814 |  |
Percent of total commercial mortgage and other loans | 5.00% | 6.40% |  |
Transitional real estate loans | Other |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Total | $ 318 | $ 255 |  |
Percent of total commercial mortgage and other loans | 2.80% | 2.00% |  |
Commercial mortgage loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Total | $ 1,537 | $ 1,709 |  |
Percent of total commercial mortgage and other loans | 13.70% | 13.40% |  |
Allowance for credit losses | $ (14) | $ (16) | (9) | (10)
Commercial mortgage loans | Office |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Total | $ 300 | $ 359 |  |
Percent of total commercial mortgage and other loans | 2.70% | 2.80% |  |
Commercial mortgage loans | Retail |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Total | $ 214 | $ 301 |  |
Percent of total commercial mortgage and other loans | 1.90% | 2.40% |  |
Commercial mortgage loans | Apartments/Multi-Family |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Total | $ 572 | $ 586 |  |
Percent of total commercial mortgage and other loans | 5.10% | 4.60% |  |
Commercial mortgage loans | Industrial |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Total | $ 436 | $ 463 |  |
Percent of total commercial mortgage and other loans | 3.90% | 3.60% |  |
Commercial mortgage loans | Other |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Total | $ 15 | $ 0 |  |
Percent of total commercial mortgage and other loans | 0.10% | 0.00% |  |
Middle market loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Total | $ 4,423 | $ 4,677 |  |
Percent of total commercial mortgage and other loans | 39.40% | 36.50% |  |
Allowance for credit losses | $ (140) | $ (146) | $ (129) | $ (96)
Other loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Total | $ 362 | $ 301 |  |
Percent of total commercial mortgage and other loans | 3.20% | 2.30% |  |

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