INVESTMENTS - Effect of Loan Modifications (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024
Transitional real estate loans | Term extension
Financing Receivable, Modified [Line Items]
Loan modification, amortized cost	[1]	$ 159
Loan modification, percent of total amortized cost		4.40%
Loan modification, term extension		20 months
Transitional real estate loans | Term extension and interest rate reduction
Financing Receivable, Modified [Line Items]
Loan modification, amortized cost	[1]	$ 178
Loan modification, percent of total amortized cost		4.90%
Loan modification, term extension		26 months
Weighted-average interest rate before modification, duration		5.20%
Weighted-average interest rate after modification, duration		4.10%
Transitional real estate loans | Other-than-insignificant payment delays
Financing Receivable, Modified [Line Items]
Loan modification, amortized cost	[1]		$ 125
Loan modification, percent of total amortized cost			2.70%
Loan modification, term extension			24 months
Transitional real estate loans | Other-than-insignificant payment delays and interest rate reduction
Financing Receivable, Modified [Line Items]
Loan modification, amortized cost	[1]		$ 278
Loan modification, percent of total amortized cost			5.90%
Loan modification, term extension			44 months
Weighted-average interest rate before modification, duration			8.00%
Weighted-average interest rate after modification, duration			6.60%
Transitional real estate loans | Other-than-insignificant payment delays, principal forgiveness and interest rate reduction
Financing Receivable, Modified [Line Items]
Loan modification, amortized cost	[1]		$ 81
Loan modification, percent of total amortized cost			1.70%
Loan modification, term extension			33 months
Loan modification, principal forgiven			$ 1
Weighted-average interest rate before modification, duration			8.20%
Weighted-average interest rate after modification, duration			7.30%
Middle market loans | Term extension
Financing Receivable, Modified [Line Items]
Loan modification, amortized cost	[1]	$ 45
Loan modification, percent of total amortized cost		1.10%
Loan modification, term extension		9 months
Middle market loans | Term extension and interest rate reduction
Financing Receivable, Modified [Line Items]
Loan modification, amortized cost			$ 15
Middle market loans | Principal Forgiveness
Financing Receivable, Modified [Line Items]
Loan modification, amortized cost	[1]	$ 15
Loan modification, percent of total amortized cost		0.30%
Loan modification, principal forgiven		$ 9
Middle market loans | Other-than-insignificant payment delays
Financing Receivable, Modified [Line Items]
Loan modification, amortized cost	[1]	$ 33
Loan modification, percent of total amortized cost		0.80%
Loan modification, deferral period, duration		36 months
Middle market loans | Principal forgiveness and term extension
Financing Receivable, Modified [Line Items]
Loan modification, amortized cost	[1]	$ 35
Loan modification, percent of total amortized cost		0.80%
Loan modification, term extension		33 months
Loan modification, principal forgiven		$ 40
Middle market loans | Principal forgiveness, term extension and interest rate reduction
Financing Receivable, Modified [Line Items]
Loan modification, amortized cost	[1]	$ 13
Loan modification, percent of total amortized cost		0.30%
Loan modification, term extension		45 months
Loan modification, principal forgiven		$ 5
Weighted-average interest rate before modification, duration		10.50%
Weighted-average interest rate after modification, duration		9.50%

[1] Net of allowance for credit losses