INVESTMENTS - Effect of Loan Modifications (Details) - Transitional real estate loans $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($)		Sep. 30, 2024 USD ($)
Other-than-insignificant payment delays
Financing Receivable, Modified [Line Items]
Amortized cost of financing receivable modified	$ 123	[1]	$ 198	[1]
Percent of total financing receivables	2.30%		3.80%
Loan modification, payment deferral in months	24 months		29 months
Other-than-insignificant payment delays and interest rate reduction
Financing Receivable, Modified [Line Items]
Amortized cost of financing receivable modified	$ 216	[1]
Percent of total financing receivables	4.10%
Loan modification, payment deferral in months			47 months
Weighted-average interest rate before modification	7.90%		7.90%
Weighted-average interest rate after modification	6.60%		6.60%

[1] Net of allowance for credit losses