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INVESTMENTS - Nonaccrual Loans (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | $ 12,592 |  | $ 12,801 |
Total, nonaccrual status | 910 |  | 718 |
Total, 90 days or more past due and still accruing | 0 |  | 0 |
Transitional real estate loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 6,078 |  | 6,114 |
Total, nonaccrual status | 829 |  | 633 |
Commercial mortgage loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 1,653 |  | 1,709 |
Total, nonaccrual status | 55 |  | 0 |
Middle market loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 4,586 |  | 4,677 |
Total, nonaccrual status | 26 |  | 85 |
Other loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 275 |  | 301 |
Total, nonaccrual status | 0 |  | 0 |
Current |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 11,585 |  | 12,050 |
Current | Transitional real estate loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 5,152 |  | 5,481 |
Current | Commercial mortgage loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 1,598 |  | 1,676 |
Current | Middle market loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 4,560 |  | 4,592 |
Current | Other loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 275 |  | 301 |
Less Than 90 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 97 |  | 141 |
Less Than 90 Days Past Due | Transitional real estate loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 97 |  | 108 |
Less Than 90 Days Past Due | Commercial mortgage loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 0 |  | 33 |
Less Than 90 Days Past Due | Middle market loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 0 |  | 0 |
Less Than 90 Days Past Due | Other loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 0 |  | 0 |
90 Days or More Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 910 | [1] | 610 | [2]
90 Days or More Past Due | Transitional real estate loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 829 | [1] | 525 | [2]
90 Days or More Past Due | Commercial mortgage loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 55 | [1] | 0 | [2]
90 Days or More Past Due | Middle market loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 26 | [1] | 85 | [2]
90 Days or More Past Due | Other loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 0 | [1] | 0 | [2]
Financial Asset, Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 1,007 |  | 751 |
Financial Asset, Past Due | Transitional real estate loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 926 |  | 633 |
Financial Asset, Past Due | Commercial mortgage loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 55 |  | 33 |
Financial Asset, Past Due | Middle market loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 26 |  | 85 |
Financial Asset, Past Due | Other loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | $ 0 |  | $ 0 |
[1] | As of March 31, 2024, there were no loans that were 90 days or more past due that continued to accrue interest.
[2] | As of December 31, 2023, there were no loans that were 90 days or more past due that continued to accrue interest.

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