INVESTMENTS - Loan Performance After Modifications (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Financing Receivable, Modified, Past Due [Line Items]
Loan modification after 12 months, nonaccrual	$ 43	$ 0
Current
Financing Receivable, Modified, Past Due [Line Items]
Loan modification, after 12 months	472	418
Less Than 90 Days Past Due
Financing Receivable, Modified, Past Due [Line Items]
Loan modification, after 12 months	6	81
90 Days or More Past Due
Financing Receivable, Modified, Past Due [Line Items]
Loan modification, after 12 months	0	0
Transitional real estate loans
Financing Receivable, Modified, Past Due [Line Items]
Loan modification after 12 months, nonaccrual	43	0
Transitional real estate loans | Current
Financing Receivable, Modified, Past Due [Line Items]
Loan modification, after 12 months	337	403
Transitional real estate loans | Less Than 90 Days Past Due
Financing Receivable, Modified, Past Due [Line Items]
Loan modification, after 12 months	0	81
Transitional real estate loans | 90 Days or More Past Due
Financing Receivable, Modified, Past Due [Line Items]
Loan modification, after 12 months	0	0
Middle market loans
Financing Receivable, Modified, Past Due [Line Items]
Loan modification after 12 months, nonaccrual	0	0
Middle market loans | Current
Financing Receivable, Modified, Past Due [Line Items]
Loan modification, after 12 months	135	15
Middle market loans | Less Than 90 Days Past Due
Financing Receivable, Modified, Past Due [Line Items]
Loan modification, after 12 months	6	0
Middle market loans | 90 Days or More Past Due
Financing Receivable, Modified, Past Due [Line Items]
Loan modification, after 12 months	$ 0	$ 0