INVESTMENTS - Transitional Real Estate Loans by Key Credit Quality Indicators (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 12,033	$ 12,801
Transitional real estate loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	128
2022	2,042
2021	2,212
2020	217
Prior	1,070
Total	5,669	$ 6,114
2024	0
2023	0
2022	0
2021	5
2020	0
Prior	10
Total	15
Transitional real estate loans | Loan to Value Ratio, 0.00% to 59.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	0
2022	615
2021	513
2020	36
Prior	143
Total	1,307
Transitional real estate loans | Loan to Value Ratio, 60.00% to 69.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	114
2022	394
2021	673
2020	18
Prior	605
Total	1,804
Transitional real estate loans | Loan to Value Ratio, 70.00% to 79.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	14
2022	814
2021	812
2020	83
Prior	173
Total	1,896
Transitional real estate loans | Loan-to-Value Ratio, 80.00% or greater
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	0
2022	219
2021	214
2020	80
Prior	149
Total	$ 662