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INVESTMENTS - Commercial Mortgage and Other Loans by Portfolio Segment (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
Participating Mortgage Loans [Line Items] |  |  |  |
Commercial mortgage and other loans, gross | $ 12,592 | $ 12,801 |  |
Percent of total commercial mortgage and other loans | 100.00% | 100.00% |  |
Allowance for credit losses | $ (232) | $ (274) |  |
Total net commercial mortgage and other loans | 12,360 | 12,527 |  |
Transitional real estate loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Commercial mortgage and other loans, gross | $ 6,078 | $ 6,114 |  |
Percent of total commercial mortgage and other loans | 48.40% | 47.80% |  |
Allowance for credit losses | $ (114) | $ (112) | $ (65) | $ (54)
Commercial mortgage loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Commercial mortgage and other loans, gross | $ 1,653 | $ 1,709 |  |
Percent of total commercial mortgage and other loans | 13.00% | 13.40% |  |
Allowance for credit losses | $ (19) | $ (16) | (9) | (9)
Middle market loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Commercial mortgage and other loans, gross | $ 4,586 | $ 4,677 |  |
Percent of total commercial mortgage and other loans | 36.40% | 36.50% |  |
Allowance for credit losses | $ (99) | $ (146) | $ (149) | $ (129)
Other loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Commercial mortgage and other loans, gross | $ 275 | $ 301 |  |
Percent of total commercial mortgage and other loans | 2.20% | 2.30% |  |
Office | Transitional real estate loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Commercial mortgage and other loans, gross | $ 1,768 | $ 1,807 |  |
Percent of total commercial mortgage and other loans | 14.00% | 14.10% |  |
Office | Commercial mortgage loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Commercial mortgage and other loans, gross | $ 356 | $ 359 |  |
Percent of total commercial mortgage and other loans | 2.80% | 2.80% |  |
Retail | Transitional real estate loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Commercial mortgage and other loans, gross | $ 335 | $ 473 |  |
Percent of total commercial mortgage and other loans | 2.70% | 3.70% |  |
Retail | Commercial mortgage loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Commercial mortgage and other loans, gross | $ 254 | $ 301 |  |
Percent of total commercial mortgage and other loans | 2.00% | 2.40% |  |
Apartment/Multi-Family | Transitional real estate loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Commercial mortgage and other loans, gross | $ 2,550 | $ 2,608 |  |
Percent of total commercial mortgage and other loans | 20.30% | 20.40% |  |
Apartment/Multi-Family | Commercial mortgage loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Commercial mortgage and other loans, gross | $ 583 | $ 586 |  |
Percent of total commercial mortgage and other loans | 4.60% | 4.60% |  |
Industrial | Transitional real estate loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Commercial mortgage and other loans, gross | $ 152 | $ 157 |  |
Percent of total commercial mortgage and other loans | 1.20% | 1.20% |  |
Industrial | Commercial mortgage loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Commercial mortgage and other loans, gross | $ 445 | $ 463 |  |
Percent of total commercial mortgage and other loans | 3.50% | 3.60% |  |
Hospitality | Transitional real estate loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Commercial mortgage and other loans, gross | $ 818 | $ 814 |  |
Percent of total commercial mortgage and other loans | 6.50% | 6.40% |  |
Other | Transitional real estate loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Commercial mortgage and other loans, gross | $ 455 | $ 255 |  |
Percent of total commercial mortgage and other loans | 3.70% | 2.00% |  |
Other | Commercial mortgage loans |  |  |  |
Participating Mortgage Loans [Line Items] |  |  |  |
Commercial mortgage and other loans, gross | $ 15 | $ 0 |  |
Percent of total commercial mortgage and other loans | 0.10% | 0.00% |  |

X
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