INVESTMENTS - Loan Performance After Modifications (Details) $ in Millions	Dec. 31, 2024 USD ($)
Current
Financing Receivable, Modified, Past Due [Line Items]
Loan modification, after 12 months	$ 418
Less Than 90 Days Past Due
Financing Receivable, Modified, Past Due [Line Items]
Loan modification, after 12 months	81
90 Days or More Past Due
Financing Receivable, Modified, Past Due [Line Items]
Loan modification, after 12 months	0
Transitional real estate loans | Current
Financing Receivable, Modified, Past Due [Line Items]
Loan modification, after 12 months	403
Transitional real estate loans | Less Than 90 Days Past Due
Financing Receivable, Modified, Past Due [Line Items]
Loan modification, after 12 months	81
Transitional real estate loans | 90 Days or More Past Due
Financing Receivable, Modified, Past Due [Line Items]
Loan modification, after 12 months	0
Middle market loans | Current
Financing Receivable, Modified, Past Due [Line Items]
Loan modification, after 12 months	15
Middle market loans | Less Than 90 Days Past Due
Financing Receivable, Modified, Past Due [Line Items]
Loan modification, after 12 months	0
Middle market loans | 90 Days or More Past Due
Financing Receivable, Modified, Past Due [Line Items]
Loan modification, after 12 months	$ 0